VibraTec, experts in structural dynamics,
acoustics and vibration
  • 19/11/2018
    IAViC – Kuala Lumpur, Nov 21st and 22nd, 2018...
  • 15/11/2018
    Why wait to schedule your 2019 training programs ?...
  • 13/11/2018
    Rail Safety Seminar – Singapore, Nov 19th, 2018...
  • 05/11/2018
    Jessica Neufond will represent VibraTec in Le Mans on 1...
  • 08/10/2018
    SIA CTTM Automotive NVH congress – Le Mans, October 1...
  • 01/10/2018
    Automotive Noise and Vibration Congress India 9-10 Octo...
  • 24/09/2018
    Hybrid aero/vibro-acoustics modeling to deal with turbu...
  • 11/09/2018
    CM 2018 in Delft, Netherlands: Rail joint dynamic force...
  • 31/08/2018
    September 2018 International Railway Conference : ̵...
  • 23/08/2018
    Dealing with gear noise of real industrial systems: an ...
  • 14/08/2018
    ShareLab – invite yourself to VibraTec !...
  • 31/07/2018
    VibraTec – European partner for tomorrow’s cities...
  • 17/07/2018
    Acoustic design of Trains and Tracks...
  • 28/06/2018
    ASME Pressure Vessels and Piping (PVP2018) Conference ...
  • 15/06/2018
    Bayesian focalisation applied to wind tunnels – AIAA/...
  • 13/06/2018
    ISNVH Congress in Graz Austria: June 20th – 22nd, 201...
  • 29/05/2018
    Customized asset management and monitoring solutions: l...
  • 21/05/2018
    2018 Vibratec China Activities...
  • 09/05/2018
    VibraTec at the ENOVA Toulouse event on the 30th and 31...
  • 02/05/2018
    Vibratec awarded by the CLEANSKY 2 to develop an instru...
  • 27/04/2018
    LUG2 project at NOVEM 2018...
  • 17/04/2018
    Ignorance is bliss ?...
  • 06/04/2018
    Come and meet VibraTec at TRA 2018...
  • 30/03/2018
    VibraTec, Matelys and RJP modelage present SILENCE MAKE...
  • 20/03/2018
    Comprehensive innovative monitoring solutions to be pre...
  • 14/03/2018
    VibraTec very first railway seminar in Malaysia !...
  • 13/03/2018
    Innovate with VibraTec ! We will be at the Smart Indust...
  • 06/03/2018
    MicrodB and Siemens Industry Software will present a pa...
  • 01/03/2018
    The JASA (Journal of the Acoustical Society of America)...
  • 22/02/2018
    Non-intrusive pipe pressure measurements – a dream co...
  • 13/02/2018
    MicrodB will be at the 7th Berlin Beamforming conferenc...
  • 22/01/2018
    Small company or multinational ? Come talk to VibraTec ...
  • 20/12/2017
    The VibraTec Group – actively involved in training to...
  • 28/11/2017
    VibraTec – preparing students for the real world...
  • 15/11/2017
    Fatigue Design 2017: Innovative numerical fatigue metho...
  • 26/10/2017
    At VibraTec, working together means having each other...
  • 10/10/2017
    VibraTec participates at JAAN on the 26th and 27th of O...
  • 05/10/2017
    AIV – FIV: VibraTec’s your one-stop piping expert !...
  • 20/09/2017
    VibraTec E-Noise Training in Shanghai China...
  • 18/09/2017
    Why wait to schedule your 2018 training programs ?...
  • 07/09/2017
    VibraTec will be at SERMA’s Technology Days on Septem...
  • 22/08/2017
    Presentation of two publications at the VDI – Int...
  • 08/08/2017
    VibraTec’s R&D is in the pipeline !...
  • 18/07/2017
    VibraTec’s training programs referenced by DataDo...
  • 13/07/2017
    Dynamic and vibroacoustic behavior of planetary gear tr...
  • 04/07/2017
    VibraTec – tackling railway measurement & simulat...
  • 29/06/2017
    Presentation of a publication at the ATZ Automotive Aco...
  • 20/06/2017
    Using Particle Image Velocimetry to address piping FIV ...
  • 15/06/2017
    We will be at the 8th VDI conference on wind turbine vi...
  • 07/06/2017
    Controlling joints to improve railway infrastructure re...
  • 01/06/2017
    Dynamic response: a pertinent indication of structural ...
  • 24/05/2017
    The Global Innovative Automotive Acoustics (NVH) summit...
  • 12/05/2017
    Presentation of a publication at Surveillance 9 Confere...
  • 03/05/2017
    VibraTec Asia Pacific to be part of Rail Solutions Asia...
  • 18/04/2017
    VIBRATEC among top NVH Specialists at the ChongQing Aut...
  • 04/04/2017
    COnnected MAintenance using VIbration measurements...
  • 10/01/2017
    We will be at SIAT India on Jan 21st...
  • 02/11/2016
    MicrodB to present R&D work at the Aachen Acoustic...
  • 27/10/2016
    VibraTec joins the CleanSky program with CANOBLE for in...
News

19/11/2018

IAViC – Kuala Lumpur, Nov 21st and 22nd, 2018

The International Applied Vibration Conference is organized by the IMM vibration committee, the largest technical committee that represents the Vibration community in Malaysia. The IMM vibration committee consist of industry leaders as well as senior technical specialists from leading organization such as Petronas, Shell, Woodgroup, VibraTec, Serba Dinamik, RZF Engineering, Baytech and AFCM as well as renowned academicians from UTM, UiTM, UM, UTAR, USM and UNIKL. In addition to that, senior engineers from government agencies such as SIRIM, the R&D arm of the Ministry of Defence and the Royal Malaysian Navy are also active members of the organizing committee.

As part of the Vibration Committee member, VibraTec is invited as key speaker and exhibitor at the conference. Our co-founder Nicolas Vincent will be delivering a topic on “A Methodology for Railway Ground Borne Noise and Vibration Prediction”. Come to meet our technical team at our exhibition stand which we will showcase our latest technologies and methodologies used in vibration control, survey and maintenance.

Venue: Park Royal Hotel, Kuala Lumpur
Date: 21st & 22nd Nov 2018 
Time: 9am to 6pm (registration starts at 8:30am)
Delegate single pass: RM 1000
Delegate group pass: RM 2500 (3 pax)
Student pass: RM 200 (please provide student ID)

15/11/2018

Why wait to schedule your 2019 training programs ?

NEW this year !  Courses dedicated to Finite Element Model Updating, Railway Maintenance & Dynamics and also Noise from Gear Systems. The first sessions are at the end of January.

The specific web pages give the schedule for our Open programs held in France. We also organize all of our courses on demand on-site for clients worldwide who wish to train groups of employees together, focusing on their specific field / job.

Referenced as an official training center and registered on the DataDock platform to enable public funding for our course attendees (from French companies), VibraTec offers courses centered around industrial vibration, acoustics, signal processing and related fields targeting engineers and technicians.

Feel free to contact our training department for more information.

 

qualified professional training
13/11/2018

Rail Safety Seminar – Singapore, Nov 19th, 2018

Rail systems are complex and long loved with many stakeholders. From early design, right through to commissioning / operation, it is important to have the ongoing assurance that they can operate safely. In collaboration with DNV GL, VibraTec is organising complimentary seminar where we cover the different aspects from Vibration Design and Diagnosis to 3rd Party testing (concrete sleepers, bridge bearing, rail track, etc.), advisory services and software to mitigate risk for your rail projects. VibraTec Railway Expert, Nicolas Vincent will be covering several technical topics, plus many case studies to share during the networking lunch and coffee breaks.

Date: 19.11.2018

Time: from 11:45am – 6:00pm

Venue: DNV GL Singapore Laboratory, 158A Gul Circle, Singapore 629616

Please contact us for more information.

05/11/2018

Jessica Neufond will represent VibraTec in Le Mans on 15-16 Nov at the Young Researchers’ Days in vibrations, Acoustics and Noise

She will present results of a study of the vibroacoustic behavior of planetary gears, from the determination of internal excitation to the vibration state of the housing.

The method developed reduces computation time (under an hour for a complete simulation) while using the real gearbox geometry.

This study focuses on planetary gear whining noise by determining internal excitation by simultaneously taking into account all meshings to include coupled interactions. The dynamic response is then calculated at any point in the housing via the resolution of the coupled equations of motion in the spectral domain and via an iterative process. Finally, experimental testing was performed to compare calculation and measurement results.

This is the subject of Jessica’s CIFRE thesis, in partnership with the Laboratory of Tribology and Systems Dynamics (LTDS, Ecole Centrale de Lyon) resulting from the common Ladage laboratory. VibraTec‘s expertise on the topic of gears is thus extended to the case of planetary gears.

Finite Element Model
08/10/2018

SIA CTTM Automotive NVH congress – Le Mans, October 17th & 18th, 2018

« Quietness mobility of the Future »

Exterior noise or interior acoustic comfort, Vibratec is on every field.

Concerning Pass-by-noise, Pascal Bouvet will show new methodologies, tools and practical solutions from the funded R&D project EcOBEx

Aurélien Cloix will present a common work with PSA on multi physics modelling for the integration of loudspeakers into automotive doors.

Plus many other subjects to share at the coffee break. Eager to see you there.

 

01/10/2018

Automotive Noise and Vibration Congress India 9-10 October 2018

Two technical papers will be delivered by our Head of Transport Department Dr Pascal BOUVET on the second day of the ANV Congress (10th October 2018). We invite you to join him at there and learn more on these topics!

Paper title: Noise radiated by electric motors: simulation process and overview of the optimization approaches. Session 6: Electric Vehicles, Time: 11:40-12:10

Paper title: Pass-by noise simulation and optimization of acoustic shielding package. Session 7: Vehicle Noise II, Time: 14:00-14:30

 

24/09/2018

Hybrid aero/vibro-acoustics modeling to deal with turbulent boundary layer noise & vibration

Presented by RomainLENEVEU, VIBRATEC, 2018 FFT Acoustic Simulation Conference (October 09-11, 2018 – Toulouse, France)

Turbulent boundary layer is known to be one dominant noise source in aircraft. In the frame of the CANOBLE Cleansky2 program, a hybrid aero/vibro-acoustics method has been developed to load the structural components of the fuselage within a heterogeneous turbulent wall pressure fluctuations field. Implementation will be detailed and validation with experimental data done at the ECL LMFA wind tunnel will be presented.

11/09/2018

CM 2018 in Delft, Netherlands: Rail joint dynamic forces computations, including rail plasticity

Vibratec will present a publication which is divided in two subjects:

  • Benchmark of 3D FE model compared to simplified model, to compute wheel-rail contact forces at rail joints: the objective is to validate the simplified approach in order to perform fast parametric variations
  • Computations of contact force including rail plasticity using 3D FEM: the objective is to assess the influence of plasticity on the contact force amplitude.

The subject started with SNCF, for which 3D FE models were developed to compute dynamic force for fatigue assessment.

VIBRATEC then decided to enhance the model by including rail plasticity (Chaboche model) and compared it to other numerical model, in collaboration with IFSTTAR, who developed the VOCO software which is used for parametric variations

31/08/2018

September 2018 International Railway Conference : ‘Rad-Schiene’ in Dresden

The French collaborative railway research project CERVIFER aims at accelerating Virtual Certification of Railway Systems. In this framework, computer models are used to compute the train-track interaction during the passage of switches.

From a geometrical description of a VOSSLOH switch and dynamic contact forces from measurements performed on an RATP commuter train, VIBRATEC built a multi-body model with the software VOCO, developed by IFSTTAR.

At the 16th International Railway Conference “Rad-Schiene” in Dresden, VIBRATEC specialist Martin Rissmann will present the difficulties and challenges of such models and the need of high quality measurement data.

23/08/2018

Dealing with gear noise of real industrial systems: an overview of the difficulties and the achievements

Alexandre CARBONELLI will present the philosophy of the research led by VibraTec in the gear dynamics field at the International Gear Conference in Lyon-Villeurbanne from August 27th to 29th.

 The presentation gives general feedback on the latest studies and on the position of a research engineer working in the gear dynamics field.

 Between academic science and the pragmatic constraints of the engineer’s job, it is important to have a strong expertise in order to work with the correct assumptions and the appropriate tools.

The close collaboration with the Laboratory of Tribology and System Dynamics (LTDS) of the Ecole Centrale de Lyon makes it possible to invest research efforts to answer real industrial concerns.

 

dynamic gear studies
14/08/2018

ShareLab – invite yourself to VibraTec !

Do you wonder about the vibration or acoustic behavior of your products and think that measurements would clarify things ?

VibraTec welcomes you to our lab and gives you free access to our sensors, data acquisition systems and facilities.

One day a month, you can set up shop at one of our test benches (with or without gantry crane) or in our semi-anechoic chamber and use our large stock of equipment (microphones, accelerometers, acoustic arrays, multi-channel analyzers, recorders, etc.) An in-house expert will be on hand to get you started.

Take advantage of this opportunity: schedule the date, then just come and install your equipment, do your testing and leave with results that you can analyze back in the office.

Sign up now: our dates this fall:

  • September 28th
  • October 26th
  • November 30th

sharing measurement equipment
31/07/2018

VibraTec – European partner for tomorrow’s cities

Horizon 2020, the European Research & Innovation Framework Program, plays an important role in local scientific and socio-economic development. Regional information sessions are organized in order to:

  • Motivate the various research and innovation actors with feedback from local experience from current Horizon 2020 participants.
  • Enable discussion and networking among these actors to facilitate the development of European projects.

VibraTec has participated in collaborative projects for more than 2 decades and is well-known in the Auvergne-Rhone-Alps R&D community. At a recent information session, our Scientific Director, Christian CLERC, presented one of our current European projects: MAVICO – COnnected MAintenance using VIbration measurements.

MAVICO uses dynamic response to monitor asset condition. Its original application is for tramways.

Using “expert” algorithms, the connected autonomous sensor can optimize maintenance and prevent incidents. Tomorrow, associated digital tweens will play an important role in managing both rolling stock and infrastructure lifetime.

More information on our railway activity herecontact us for other applications

17/07/2018

Acoustic design of Trains and Tracks

Proper acoustic design of rolling stock and track requires you to assign qualitative and quantitative targets to each piece of equipment, validate your choices, and identify problematic noise sources.

The railway experts of Vibratec can help you all along this process: from the characterization of acoustic sources and airborne and structure-borne transfer paths to the simulation and measurement of interior and exterior noise as well as ground borne vibration, troubleshooting, and optimization of equipment.

Using cutting edge simulation technology and measurement methods, Vibratec has accumulated an extensive experience working to the benefit of the world leading manufacturers and most significant projects.

Don’t hesitate to vist us at Innotrans, Hall 3-2, stand 301 C6 to see how we can help you.

28/06/2018

ASME Pressure Vessels and Piping (PVP2018) Conference – VibraTec to publish our technical developments

VibraTec will publish 3 papers at the PVP Conference in Prague next month. The articles will present an innovative method to model fluid-structure interaction in industrial piping, and also non-intrusive diagnosis.

Heavy fluid flow within industrial piping interacts with structure walls, applying an asymmetric, unsteady load. Vibrations provoked by this flow are an important phenomenon that is hard to model accurately. VibraTec is proud to present our innovative findings; a new simplified approach to modelling turbulent sources. Our progress in non-intrusive characterization of fluid loads will also be published.

Rémi SALANON and André BARAMILI will be on hand on the 17th and 18th of July to discuss your piping issues and answer questions.

More information available on the conference website.

piping excitation model
15/06/2018

Bayesian focalisation applied to wind tunnels – AIAA/CEAS conference Atlanta

Between 25th and 29th June 2018 will be held the 24th AIAA/CEAS Aeroacoustics Conference in Atlanta.

It is certainly one of the most famous scientific conferences in the field of flow induced acoustics. MicrodB is proudly contributing to a research paper, together with Ecole Centrale de Lyon, University of Sherbrooke and Safran Aircraft Engines. The work, entitled ‘Broadband Airfoil-Noise Source Localization by Microphone Arrays and Modeling of a Swept Free-Tip Blade’ will be presented by Gyuzel Yakhina.

It is the occasion to apply advanced microphone array techniques in complex wind tunnel configurations.

13/06/2018

ISNVH Congress in Graz Austria: June 20th – 22nd, 2018

VibraTec will attend the 10th ISNVH Congress in Graz Austria, June 20-22. Jean-Luc Wojtowicki will be on stage to present two papers on our core expertise:

  • The characterization and simulation using super element of structure borne noise sources and transfer paths in partnership with Renault and Valeo
  • The optimization of the noise of e-machines and their supply (PWM)

Henri Saucy will be in the room to encourage him and to gather your comments and questions.

Eager to see you there.

29/05/2018

Customized asset management and monitoring solutions: learn about at Achema, from 11th to 15th of June 2018

Surveillance or maintenance: ignorance is bliss?

Do not stay in the dark! Have better nights: discover our Smart Solutions to plan your maintenance and ensure the quality of your activity.

To find out more, come see us at the ACHEMA trade show in Frankfurt, 11th to 15th of June 2018, hall 11.0 booth A58. We will answer your questions, especially in the production, process and energy industries.

If you want free invitation, contact us.

21/05/2018

2018 Vibratec China Activities

Started off with the NVH symposium held in Suzhou on 10 &11th May. Vibratec Head of Automotive Department Pascal Bouvet was invited by the SAE-China NVH Committee to deliver a speech at the NVH symposium. The events allow us to meet and discuss in group around the topics about vehicle NVH control technology. Hereby, we would like to extend our heartfelt gratitude to the SEA-China NVH Committee for the invitation to speak for such a large scale event.

Alongside with our Chinese partner Yiduo Technologies, we organised and delivered a training on E-noise and Gearbox noise in Shanghai from 14-16th May. It was very encouraging to see more than 50 attendees from major automotive players in China. Thank you Yiduo Technologies for your support in hosting the training and made it a huge success.

Stay tuned for upcoming events !

09/05/2018

VibraTec at the ENOVA Toulouse event on the 30th and 31st of May 2018

Come and meet us on booth B10 and discuss your needs for optimizing the design of your equipment in noise, vibration, and reliability. We will also present innovative instrumentation solutions, embedded or not, for the diagnosis and control of the life cycle of your products. Among the presented solutions: the SoundCam solution developed by our subsidiary MicrodB to perform a rapid acoustic diagnosis of a complex mechanical system; and an original solution for diagnosing the components of a transmission chain.

02/05/2018

Vibratec awarded by the CLEANSKY 2 to develop an instrumented engine cradle for the turboprop demonstrator ground test with SAFRAN Helicopters Engines

In the framework of the development of a new turboprop engine demonstrator (ENGine ITD JTP CLEANSKY 2) for the 1800-2000 thermal hp class, a full Integrated Power plant System (IPPS) will be ground tested. Derived from the ARDIDEN 3 Turboshaft engine, the engine will be equipped with new propeller and power gear box including air intake and nacelle.

VibraTec will be in charge to design, to manufacture and to qualify an instrumented engine cradle with two major objectives: the monitoring of the engine loads in operational conditions and the reduction of the vibration path to optimize the crew and passenger comfort.

27/04/2018

LUG2 project at NOVEM 2018

MicrodB, INSA Lyon and CNRS will present a paper entitled « SENSITIVITY ANALYSIS OF ACOUSTIC INVERSE PROBLEMS » at NOVEM 2018 Ibiza from 7th to the 9th May

The characterisation of an acoustic source is achieved by retro-propagating the acoustic field measured with a microphone array to a mesh of the surface of interest. This latter step is performed by solving an inverse problem. Such inverse problems are built on the basis of a forward model prone to uncertainties arising from the physics of the experiment.

Assessing the effects of these uncertainties on the resolution of the inverse problem represents a challenge. This paper introduces a practical solution to measure these effects by conducting a sensitivity analysis. The sensitivity analysis method applied here provides a mean to identify and rank the main sources of uncertainty through the estimation of sensitivity indices. Two inverse methods are investigated for the reconstruction of a monopole source: Beamforming and Bayesian focusing. The propagation of uncertainties is carried on numerically. The consistency between the real experiment and its numerical approximation is assessed by means of a small batch of measurements performed in a semi-anechoic chamber.

LUG2
17/04/2018

Ignorance is bliss ?

Why would you monitor your production line, when it’s so much simpler to just wait for it to break down and bring your entire activity to a full stop?

If “Ignorance is bliss” isn’t your motto, if you sleep better with your maintenance well-scheduled and a rigorous quality control, you may be interested by our Smart Solutions.

Combining multi-physics sensing with state of the art modelling and Digital Twin technology, VibraTec offers customized asset management and monitoring solutions independent of any specific hardware or software.

To learn more, come and see us at ACHEMA in Frankfurt, Germany, from 11th to 15th of June 2018, hall 11.0 booth A58, where we can introduce you to our experience with the manufacturing, process, and energy industry.

06/04/2018

Come and meet VibraTec at TRA 2018

If you are interested in meeting VibraTec at TRA 2018 in Vienna on the 17th and 18th of April, Lucille LAMOTTE  will participate in the oral presentations and bilateral meetings organized in parallel by ETNA2020 Transport Networking and Brokerage Event focusing on the Horizon H2020 ‘Smart green and integrated Transport’ calls 2018-2020.

As an SME used to working on R&D projects on both national and international levels, we know the importance of finding the right partners for each project. ETNA is the perfect opportunity to broaden our network and increase visibility for potential European partners.

Transportation network
30/03/2018

VibraTec, Matelys and RJP modelage present SILENCE MAKERS

Discover our global offer to design, optimize and manufacture of your customized acoustic package (industrial machinery and vehicles). We will also present our successful experience within the Ecobex project aiming to control the pass-by noise in the automotive field.

Place: Novotel at Massy (91300), France

Date: Wednesday April 11th, 2018 – 9:30 am – 5:00 pm

Contact

Register

20/03/2018

Comprehensive innovative monitoring solutions to be presented at ACHEMA

Looking for a comprehensive, innovative solution to monitor your production process or characterize your products and raw materials?

VibraTec will participate in the ACHEMA trade show in Frankfurt from June 11th to 15th. We will present our SmartSolutions applied to a variety of industries and processes: energy, transportation, pumps, medical devices, test benches, safety and quality control.

Come and visit us to see how we can help you boost productivity and manage your assets the smart way!

Henri, Nicolas, and Katja will be waiting for you at booth A58, Hall 11.0.

SmartSolutions
14/03/2018

VibraTec very first railway seminar in Malaysia !

With over 30 years of involvement in the rail industry, VibraTec has a proven track record of experience and knowledge of physical phenomena on both rolling stock and infrastructures working with some of the world’s leading main line operators, urban operators, rolling stock manufacturers, equipment manufacturers and engineering companies at all stages of project development from concept and early design right through to commissioning.

In an attempt to make inroads into Asia, VibraTec is proud present its very first railway event in Malaysia this coming 26th March which will be held at Aloft Hotel Kuala Lumpur. Amongst many with a view to showcase some of its research and technological advancement made in Europe for clientele in Malaysia. This seminar will be delivered by Brice NELAIN, our Railway specialist from France. During the seminar we will discuss subject matters related to:

  • Track Studies and Maintenance
  • Ground Vibration Studies
  • Interior and Exterior Acoustics
  • Wheel Rail Interaction
  • Durability and Residual Life study

We are proud to announce that we have almost registered participants namely from Bombardier, MMC-Gamuda, Gamuda, Prasarana, Rapid Rail, Malaysia Rail Link, Scomi, Thales Group, Jacobs (CH2M), Consolis, Strand, Sepakat Setia Perundingan, MML Universal Testing & Engineering, PCE Engineering Services and etc.  

13/03/2018

Innovate with VibraTec ! We will be at the Smart Industries event during the Global Industrie fair in Paris from 27 to 30 March

VibraTec was chosen to represent the Auvergne-Rhone-Alpes region as an SME with innovative products & services (predictive maintenance, innovative sensors, digital twins, etc).

Agnès Gerphagnon and Lucille Lamotte will present the group’s latest innovations, including the LMS SoundCamera developed by MicrodB and our predictive maintenance SmartSolutions connected, autonomous sensors.

The Global Industrie fair focuses on the Industry of the Future and brings together stakeholders from the entire manufacturing ecosystem and all industry sectors. It is backed by President Macron, the French government and the Industry of the Future Alliance (AIF). From March 27th to the 30th, almost 3 thousand exhibitors will welcome over 50 thousand visitors.

connected sensors
06/03/2018

MicrodB and Siemens Industry Software will present a paper at DAGA2018

MicrodB and Siemens Industry Software will present a paper entitled “Sound Source Localization Analysis in the Combustion Cycle of ICE Powertrains” at DAGA 2018 in Munich from the 19th to the 22nd of March

In order to help engine manufacturers optimize powertrain noise, MicrodB and Siemens Industry Software NV propose Sound source localization techniques supported by advanced processing.

The application of a cyclic Wiener filter relying on reference cylinder pressure sensors effectively separates microphone array data into combustion and mechanical components. Sound source localization of these separated components makes it possible to identify the main sources related to combustion and mechanical noise.

The powertrain noise – mechanical and/or combustion – can also be analyzed in segments of the combustion cycle itself. This requires pre-processing in the angle domain, after which sound source localization is applied on angular ranges.

During the presentation those two processes will be described and applied to engine test bench experimental data.

01/03/2018

The JASA (Journal of the Acoustical Society of America) chooses MicrodB as the latest Technical Area Pick in Signal Processing

The article, entitled “Instantaneous Bayesian regularization applied to real-time near-field acoustic holography”, was published on August 16th 2017. It has been chosen among all articles related to signal processing published throughout 2017.

MicrodB’s technological developments make it possible to reconstruct non-stationary acoustic sources (closing doors, rotating sources, transitory phenomena) using acoustic imagery.

The main scientific development is to have solved the inverse problem by using a Bayesian approach that significantly increases the method’s stability. The method is also enhanced to allow the reconstruction of long signals.

We are proud to see that Thibaut LE MAGUERESSE’s PhD thesis, fully integrated in the VibraTec group’s R&D program, has achieved such professional recognition.

sound-pressure-fields
22/02/2018

Non-intrusive pipe pressure measurements – a dream come true !

VibraTec is proud to present results of our work in developing a non-intrusive method to measure pressure in pipes using PVDF (PolyVinlyDiene Fluoride) sensors.

Having developed a dedicated calibrator to determine the fluid / structure coupling coefficient, VibraTec is able to assess PVDF sensor sensitivity according to specific installation characteristics at each client site.

This method avoids problems linked to pressure taps that are not positioned conveniently for these measurements. It is accurate regarding phenomenon amplitude & frequency location.

The paper will be presented at OTC Asia 2018 in Kuala Lumpur from 20th to 23rd of March.

PVDF sensor
13/02/2018

MicrodB will be at the 7th Berlin Beamforming conference – BeBeC

March 5-6, 2018 – Berlin – Germany

This will be an opportunity to present our recent work on the evaluation of a method:  functional beamforming.

This method of source localization is in vogue in the field of aeroacoustics because it presents good results in spatial resolution.

But what about its ability to quantify the power of acoustic sources? This is what we evaluated by means of a theoretical, numerical and experimental study. The aim is to rigorously identify the strengths of this method for possible integration into our products.

This work was conducted in collaboration with Creatis as part of the ABYSSOUND research project.

Functional beamforming
22/01/2018

Small company or multinational ? Come talk to VibraTec personnel at the INSA’s Professions Day on January 31st

VibraTec is a regular participant at this annual event organized by the INSA Lyon’s Mechanical Engineering Dept.

Four VibraTec experts will be participating this year :

  • Hervé GOUTAGNY, Project Manager, will share his career experience;
  • Emmanuel REYNAUD, Sales & Project Manager, will compare work in an SME and work in a multinational ;
  • Cyril GAUMAIN, Head of Department, will explain how R&D is integrated in SMEs ;
  • Fanny QUERVILLE will be at our stand to present current openings (internships & jobs) and review student resumés.

Choose the right direction
20/12/2017

The VibraTec Group – actively involved in training tomorrow’s technicians and engineers

“Our continuous presence at the heart of higher education creates connections with our future clients and partners.” Christian Clerc, Scientific Director.

A few employees are on Engineering & Master’s program steering committees. Some complete Engineering school’s theory classes with concrete applications implicating state-of-the-art technology.

Others teach in technical schools throughout their 2- or 3-year programs. In this context, VibraTec opened its lab to a class of 1st-year students from the IUT in St Etienne on December 14th. The students shared the daily life of technicians and talked with alums who now work at VibraTec.

These diverse contacts with the reality of industrial life are an important element of each one’s career choices.

découverte matériel mesure
28/11/2017

VibraTec – preparing students for the real world

This year as usual, VibraTec visited the IUT of Saint Etienne’s Applied Physics Department, helping to bridge the gap between academic theory and the reality of the working world.

VibraTec offers students the possibility to discover various examples of what a vibration – acoustics techician’s job is: concrete case studies, measurement methods & material, professional profiles, the pertinence of knowing English, etc. This helps clarify student orientation – and gives some the desire to work at VibraTec during their training and/or afterwards !

A group of students will also visit our headquarters in December to discover our lab and exchange with our teams on their day-to-day lives.

IUT St Etienne
15/11/2017

Fatigue Design 2017: Innovative numerical fatigue methodology for piping systems: qualifying Acoustic Induced Vibration (AIV)

Fatigue Design 2017 Conference in Senlis (France) from the 29th to the 30th of November will be the occasion for VibraTec to present its work on AIV fatigue methodology.

Acoustic Induced Vibration (AIV) refers to the high acoustic energy generated by pressure-reducing devices that excite pipe shell vibration modes, producing excessive dynamic stress. Analysis of this risk is an important part of Asset Integrity Management systems as AIV can cause catastrophic piping failure. Existing guidelines address this risk through an analytical assessment. However, these methodologies are limited.

The proposed approach for identifying AIV damage is based on a dynamic stress evaluation at pipe discontinuities (welded connections and supports). This evaluation is performed through a fluid-structure coupling Finite Element Analysis. Pressure fluctuations inside the pipe are predicted and coupled with a pipe structural analysis. This methodology is provided with its validation through measurement on an actual AIV field case, corresponding to a crack initiation due to AIV.

AIV_Fatigue Design
26/10/2017

At VibraTec, working together means having each other’s backs

In addition to specific training programs to work safely and efficiently in high-security environments, VibraTec Group employees follow improvement programs defined each year by personnel representatives (CHSCT – Hygiene, Safety and Work Conditions Committee). A large part of the program is dedicated to preventive and remedial actions based on past experience / incidents.

This year, all of VibraTec personnel was given basic first aid training: to improve workplace security and also simply become more able, responsible citizens.

10/10/2017

VibraTec participates at JAAN on the 26th and 27th of October 2017 in Toulon

VibraTec contribution to JAAN 2017 (Ollioules, France, 26th and 27th of October 2017): « Acoustic transparency of Alberich coatings under high water pressure: coupled simulation methodology »

VibraTec will present a coupled simulation methodology for the estimation of the acoustic transparency (as well as reflection) of rubber coatings with periodic air inclusions (as Alberich coatings) under high water pressure. These panels are made for being implemented on underwater structures. Many challenges must be addressed: the large strain of the coating under static water pressure, the highly non-linear behavior of the hyperviscolastic material, the influence of the static deformation on the acoustic behavior. The possibilities offered by this method are of utmost interest: optimizing the design of the coating and the properties of the material to improve the acoustic performance of the coating under given pressure and temperature conditions.

05/10/2017

AIV – FIV: VibraTec’s your one-stop piping expert !

Piping vibration can lead to severe damage to main lines & auxiliary systems (small bore, thermowells etc.): vibration can induce cracks & leaks, leading to heavy maintenance and even installation shutdown. Proper understanding of the phenomena at stake is essential to prevent and mitigate these risks. VibraTec is a world-class expert that can help you keep your major piping vibration issues under control.

This year’s SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition in Jakarta (and not Bali as initally planned) from the 17th to the 19th of October will be the occasion for VibraTec Asia Pacific’s Hafiz KARIM to present two papers based on case studies respectively in AIV diagnosis & mitigation (a cracked FPSO flare network tail pipe), as well as in discontinuity-related FIV issues in pipe system design.

The perfect time to come learn more !

20/09/2017

VibraTec E-Noise Training in Shanghai China

VibraTec, through its partner YiDuo is organizing its very first customized E-Noise training in China comprising a 3-day session on “Noise from Electromagnetic Origin” to be delivered in Shanghai from 25th – 27th September 2017. This training targets management, engineers and technicians working in the field of design and application of electric machines or vibroacoustics. The intended program will cover the following topics:

  • Day 1: Electrical machines (architecture, operating principle and control) with their associated power converter and control strategies;
  • Day 2: Noise from electrical machines and power converters (magnetic excitations, vibrational behavior, radiated noise, important parameters);
  • Day 3: Examples and questions / answers.

Practical cases including illustrations from VibraTec’s own Research & Development projects in the automotive field (powertrain, power converters and electric motor) are also part of the itinerary.

The training will be delivered by one of VibraTec’s E-Noise specialists, Sylvestre LECURU.

18/09/2017

Why wait to schedule your 2018 training programs ?

Referenced as an official training center and registered on the DataDock platform to enable public funding for our course attendees (from French companies), VibraTec offers courses centered around industrial vibration, acoustics, signal processing and related fields targeting engineers and technicians.

The 2018 catalogue gives the schedule for our Open programs given in France.

We also organize all of our courses on demand on-site for clients worldwide who wish to train groups of employees together, focusing on their specific field / job.

Feel free to contact our training department for more information.

07/09/2017

VibraTec will be at SERMA’s Technology Days on September 21st and 22nd near Bordeaux

VibraTec and Serma will present the fruit of their collaboration regarding the reliability of mechatronic equipment. Very different, electronic and mechanical reliability are rarely studied together. The work carried out by VibraTec and Serma aimed to couple the two approaches in order to produce reliable mechatronic equipment. The resistance/stress reliability approach and specific mechatronic applications will be presented.

22/08/2017

Presentation of two publications at the VDI – International Conference on Gears in Munich, Germany, September 14th, 2017

The VDI – International Conference on Gears – is a congress gathering the main actors in the field of gears. VibraTec has taken part in this event since 2008, with the first studies engaged through the MABCA project, focusing on the vibroacoustic characterization of cylindrical gears. This year, VibraTec will present two papers on whining noise:

  • an industrial application on a train bogie with cylindrical gears,
  • the adaptation of a simulation method in order to deal with planetary gears.

08/08/2017

VibraTec’s R&D is in the pipeline !

Singularities in industrial pipelines (such as section or direction changes) are often responsible for vibrations caused by continuous internal flow. To understand and model the complex fluid source, VibraTec has been conducting innovative research combining experimental methods, instationary fluid mechanic computations and statistic tools applied to reduced-scale models.

We are proud to be sharing an overview of current results at the « Congrès Français de Mécanique » in Lille from August 28th through September 1st. 2 presentations – a great occasion to meet you and discuss these issues.

18/07/2017

VibraTec’s training programs referenced by DataDock

VibraTec has been referenced as an official French training center for many years: we are now also registered on the DataDock platform, which centralizes information concerning French training centers to facilitate funding by “OPCA” (accredited fund-collecting / funding agencies), associations in charge of funding professional training throughout workers’ careers.

Yet another sign of VibraTec’s commitment to quality in all aspects of our activity.

13/07/2017

Dynamic and vibroacoustic behavior of planetary gear trains – VibraTec is on the job

Manufacturers are more and more demanding when it comes to dynamic and vibroacoustic characterization of gear transmissions; this strong interest impacts several sectors, such as renewable energies (wind turbines, etc) or the automotive industry where specifications impose radiated sound levels, where clean transport implicates compact transmissions with moving axes such as planetary gear trains that require characterization.

If the vibroacoustic aspects of cylindrical gears are well understood, minimization of acoustic noise generated by planetary gear transmissions requires complementary studies.

With the aim of developing and validating efficient tools to predict the dynamic behavior of planetary gear trains, VibraTec, in collaboration with the Tribology and Dynamic Systems Laboratory (LTDS) within the framework of LabCom (common laboratory) LADAGE, is both proud and pleased to welcome Jessica NEUFOND in her CIFRE thesis addressing “Dynamic and vibroacoustic behavior of planetary gear trains”.

04/07/2017

VibraTec – tackling railway measurement & simulation issues for more than 30 years !

VibraTec has been working in the railway field for more than 30 years and has capabilities in measurements and simulations. Two issues are growing inside the scientific community in the railway fields: maintenance with cost reduction at stake, and the environmental impact due to increasing demand in urban areas.

VibraTec is taking part in the state-of-the-art advance in these two subjects, and will present 3 papers at the upcoming ICRT Conference in ChengDu, China.

The first paper is related to maintenance. In a study performed for the SNCF (French national railway institution), a comprehensive finite element model has been set up to compute the time domain contact force due to a rail joint. Predicting the contact force will help to control the stress in the track and hence help to reduce maintenance. Both the difficulties encountered and the final results will be presented.

The two other papers are dedicated to ground-borne noise and vibration issues. First, a benchmark of soil-building numerical models has been performed with the CSTB (French national building institute of research) to compare and highlight the differences between a 2.5D FEM-BEM approach and a 3D FEM approach. Several application cases are developed to present the pros and cons of each model.

Secondly, VibraTec and Acouphen are presenting their practical methodology to characterize soil by measurements. Measurement quality is evaluated on-site by a step-by-step process. The excitation must be chosen according to preliminary results and adapted if necessary.

If you want to know more, join us in ChengDu from the 10th to 12th of July !

 

29/06/2017

Presentation of a publication at the ATZ Automotive Acoustics Conference in Zurich, Switzerland, July 11th, 2017

VibraTec will be giving a presentation on noise from electric vehicles at the ATZ Automotive Acoustics Conference in Zurich on July 11th.

The emergence of high frequency pure tones and an overall low noise level characterizes the drivetrain of e-vehicles. This sets specific challenges for the NVH automotive engineer.

Over the last decade, VibraTec has accumulated a vast experience in this field, and developed specific tools to calculate the dynamic response of e-machine, and sound and vibration propagation in and out of the vehicle, and help OEMs and equipment suppliers optimize their products.

Real-life examples from industrial cases will be presented illustrating different ways to mitigate sound generation, working on the power supply strategy, active electromagnetic parts, or machine structure.

20/06/2017

Using Particle Image Velocimetry to address piping FIV issues

VibraTec is reaching a new level of innovation in the study of Flow-Induced Vibrations in piping systems: we are the first to perform coupled vibration and fluid dynamics measurements in confined flow configurations, using advanced Particle Image Velocimetry (PIV) techniques. We are proud that our work on tackling the challenges of this coupled measurement campaign will be presented at the 12th International Symposium on Particle Image Velocimetry in Busan, South Korea from June 18th through 22nd.

15/06/2017

We will be at the 8th VDI conference on wind turbine vibration in Bremen/Germany on June 27th-28th, 2017

VibraTec will be at the 8th VDI conference on wind turbine vibration in Bremen on June 27th-28th, 2017. We will present our expertise on experimental and numerical vibratory diagnosis techniques in this context.

 After a wind turbine was retrofitted with a new generator, much higher noise levels recorded at the foot of the tower raised concerns about its reliability. VibraTec was called to perform a thorough on-site diagnosis to determine the origin of the noise and assess the risks on the fatigue behavior of the structure. To take all possible vibration sources into account, a multi-physics approach was applied, covering electromagnetic excitation, torque pulsation, cogging torque, unbalance and bearing condition. Advanced experimental techniques such as simultaneous recording of sound pressure, current signals and accelerations were applied to assess the vibrational behavior of the wind turbine.

The results of the diagnosis gave conclusive arguments on the safety of the operation in the new conditions.

 

07/06/2017

Controlling joints to improve railway infrastructure reliability

This challenge was accepted by VibraTec, who’s Brice NELAIN will be publishing study results entitled “Computation of dynamic forces generated by rail joints” at the Railway Engineering Congress in Edinburgh from June 20th to 22nd. He will explain how Finite Element modelling simulation was used to analyze the impact of various rail geometries on rail and rolling stock wear.

01/06/2017

Dynamic response: a pertinent indication of structural mechanical reliability

Christian Clerc, VibraTec’s Scientific Director, will participate in a roundtable regarding “The importance of infrastructures: resilient, dynamic urban ecosystems serving connected mobility” during the « Revue annuelle des nouveaux usages consacrée à la mobilité » organized by the ANRT (National Association for Research & Technology) on June 15th in Bezos (Paris), France.

Anticipating failures, preventing passenger discomfort and noise pollution, optimizing maintenance at reduced cost are essential elements of railway infrastructure management.

  • Goal: take advantage of new IT and communication technologies to capitalize on 30 years of experience in acoustics and dynamics in the transportation field.
  • Digital technology contribution: vibratory and acoustic signatures provide information regarding the condition of both rolling stock and track and can therefore be analyzed to monitor wear and prevent failure. What used to require costly and fastidious measurement campaigns can now be integrated in an autonomous connected object thanks to new technology: MEMS captors, integrated processors & wireless communication.
  • Application: in the transportation field, on-board objects can be compact and intelligent, capable of measuring, analyzing and communicating in real-time the mechanical evolution of the structure or system to which they are applied. They will function on recovered vibration energy.
  • The railway application addressed by the MaViCo project aims to identify, localize and monitor various defects. The final product will serve to optimize mid-term maintenance (slow wear) as well as to prevent breakdowns (broken track, leaves/deposits on the track) and to avoid noise pollution (from screeching for instance).

24/05/2017

The Global Innovative Automotive Acoustics (NVH) summit will take place in Berlin, June 13-14, 2017.

VibraTec will participate to this event and Dr. Pascal Bouvet will present VibraTec’s innovations in the field of noise from Electric powertrain. The capabilities of VibraVolt and VibraGear softwares, respectively dedicated to the computation of noise of electric machine and noise of gearbox, will be presented as well as several industrial applications.

This premier B2B event will bring together NVH experts to ensure maximum knowledge transfer and professional exchange; elaborate on the best practices within the automotive acoustics industry, and academia to discuss, hear and learn about their experiences on automotive acoustics, to network and enjoy excellent mix of case studies, interactive panel discussions, speed networking and workshops.

vibroacoustique electrique moteur
12/05/2017

Presentation of a publication at Surveillance 9 Conference in Fes, Morocco, May 22nd to 24th, 2017

The noise from “Root” type vacuum pumps is a major disadvantage to wider use. The noise sources and the mechanisms involved in these pumps are complex, strongly coupled and their modeling is delicate (3D fluid calculations in a cavity of changing geometry, coupled with a nonlinear meshing dynamic).

The collaborative project FUI ARPE (Acoustics and vibration of vacuum pumps) aims to significantly improve the multi-physical modeling of these pumps. In this context, a measurement campaign was set up, on the one hand, to recalibrate the models and, on the other hand, to establish a vibro-acoustic diagnosis of the pumps.

VibraTec will be at the Surveillance 9 Conference in Fes, Morocco, from May 22nd to 24th May, 2017, to present the measurements performed and their uses (shock detection, psycho acoustic criteria, etc.)

03/05/2017

VibraTec Asia Pacific to be part of Rail Solutions Asia 2017

VibraTec Asia Pacific Project & Business Manager Ravindran KALIDAS will be presenting a paper addressing “Robustness and Reliability of Railway Equipment” at the Rail Solutions Asia Event in Kuala Lumpur on May 25th.

Railway equipment – both rolling stock & infrastructures – is subjected to high mechanical stress that must be integrated from the design stage. Standards have been established, but do not always guarantee reliability. This paper details the in-house methodologies (using calculation and testing) that provide more relevant input data for conception and use; realistic loads for models, realistic conditions for experimental validation, implementation of a loading database, feedback on the use of different materials and material residual life duration study results.

diagnosis expertise study
18/04/2017

VIBRATEC among top NVH Specialists at the ChongQing Automotive Acoustic Summit on 27-28 April

The 2017 Chongqing Automotive Acoustic Summit is hosted by the China Automotive Engineering Research Institute Co., Ltd (CAERI), Chongqing University, and the French Society of Automotive Engineers. It is organized by the State Key Laboratory of Vehicle NVH and Safety Technology and will be held on 27-28 April 2017 in Chongqing, China.

Top NVH experts from Europe, Japan, USA and China will address the summit on the latest achievements and innovative technologies in sensitive areas such as new energy vehicle NVH, light-weight conception, new power train technologies and the future trends of global market and technology evolution.

VIBRATEC will participate in this event: Dr. Pascal Bouvet will present VIBRATEC’s innovations in the field of Electric powertrain noise. The capabilities of VibraVolt and VibraGear software, respectively dedicated to the computation of electric machine noise and gearbox noise, will be presented as well as several industrial applications.

Emachine acoustic radiation
04/04/2017

COnnected MAintenance using VIbration measurements

MaViCO aims to develop a new generation of conditioned maintenance tool for the railway industry, using an energy-autonomous defect detector based on vibration analysis that will be capable of acquiring, processing and transmitting data in view of facilitating conditioned / predictive rail / rolling stock maintenance.

Mounted on the track, it will detect wear in specific sensitive zones of the infrastructure (switch and crossing area or transition area) and/or detect rolling stock defects (influence of the rolling stock). Mounted on the rolling stock, it will detect track wear defaults (corrugation, defective rail joints, squats, etc). 

This collaborative project, co-financed by the ADEME (French Environment & Energy Management Agency) and implicating the VapéRail and Kéolis companies as well as the LaMCoS (INSA Lyon) lab, started at the beginning of this year: the technical scope is currently being tuned to meet customer expectations.

10/01/2017

We will be at SIAT India on Jan 21st

In the context of the upcoming reduction of Pass-By-Noise limits in EU regulations, VibraTec has participated in research programs focusing on a new procedure for the optimization of the shielding package, based on a precise 3D localization and quantification of the acoustic sources of the powertrain and on their implementation in an Energy Boundary Element model, computing acoustic propagation.

Join the Head of our Automotive Department, Mr Pascal Bouvet, who will be presenting a technical paper on this topic at the upcoming SIAT conference in India on the 21st January 2017.

3D automotive holography
02/11/2016

MicrodB to present R&D work at the Aachen Acoustics Colloquium later this month

MicrodB will be presenting the results of a common research work with Renault on using 3D acoustic holography to reduce vehicle pass-by noise at the Automotive Acoustics Colloquium in Aachen on November 22nd-23rd.

In the framework of the ECOBEX research program, a new precise and efficient procedure for the 3D localization and quantification of sound sources in space has been devised and tested to help feed acoustic BEM models and design optimum acoustic shielding for vehicle powertrain.

To localize sound sources with better accuracy in space, MicrodB has developed a method based on synchronizing distinct patch measurements with standard microphone arrays located around the source and reconstructing the 3D sound field using acoustic holography and an innovative Bayesian approach. The resulting sound map is presented on a 3D model of the car engine. Alternatively, the same method can be used in engine test benches to conveniently and efficiently localize and quantify sound sources: The synchronization of patch measurements greatly simplify the lab work in an environment with limited space and accessibility while guaranteeing precise localization.

3D automotive holography
27/10/2016

VibraTec joins the CleanSky program with CANOBLE for interior cabin noise, the sky’s the limit !

VibraTec together with the École Centrale de Lyon and GIE S2A join the CLEANSKY 2 program and the Large Passenger Aircraft platform to study wall-pressure fluctuations beneath turbulent boundary layers, for the benefit of the aeronautic industry.

CANOBLE R&D partners

The CANOBLE project (CAbin NOise from Boundary Layer Excitation) aims to develop and validate innovative engineering methods and technologies to study interior noise caused by TBL.

More information

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