Vibratec

Software for Railway Ground Borne Vibration Prediction

GroundVib is a dedicated software package for predicting ground borne noise and vibration levels for railway systems. Its user friendly interface enables the computation of sources of vibration excitation that is then transmitted to the ground. The train and track models are coupled to the excitation. The excitation could be a roughness spectra (which represents the quality of the rail and wheel rolling surface), a singularity (such as a rail joint, or a wheel flat) or a parametric excitation (related to the discontinuous supports of the rail). GroundVib software is part of the global methodology developed and validated by VibraTec to work with, and understand ground borne and structure borne noise and vibration issues.

INPUT :

• Roughness
• Train speed
• Building distances
• Soil decay rate or soil type

Database (evolutive) :

• Wheel – rail roughness
• Soil decay rates
• Building transfer functions

OUTPUT :

Vibration level (Lv, eVDV, …) :

• Track component
• Building threshold
• Inside building

References: London (Crossrail), Firenze, Paris, Constantine, Alger, Lyon, Orléans, Toulouse, Bordeaux, Grenoble, Grand Paris Express,…