Cross-acceptance of track tests in Railway Dynamics

The goal of the DynoTRAIN is to limit the costs of the certification by improving cross-acceptance, through the following innovations:

• The characterisation of the irregularities of the track;
• The characterisation of contact geometry of wheel and rail;
• The determination of the friction coefficient;
• The use of simulation to facilitate the cross-acceptance.

Instrumented Wheelset which will be used to perform the measurement campaign
 

Track geometry quality
The expected main innovation shall be a new description of track geometry quality with a good correlation to the vehicle’s response.

Contact geometry
The expected main innovation shall be a new description of track geometry quality with a good correlation to the vehicle’s response.

Modelisation of non-hertzian Wheel/rail contact
 

Wheel/rail analysis: contact points and contact patches
 

Virtual Certification in Railway Dynamics
This now mature use in the design process of simulation of the dynamic behaviour of rail vehicles make possible the following:

• It is envisaged, through further validation of their prediction capacity within this project, to use multi-body vehicle models for the certification of a vehicle, once submitted to a first series of tests, to extrapolate the tests results to other conditions, as required for certification. For the cases in which the latter conditions would have been difficult to meet, if the running test were actually to be organised, time and money can be saved in the vehicle certification process;
• It is also envisaged to use the simulated behaviour of a new or modified vehicle “close” to a vehicle already certified by test, to avoid repeating certification tests on the new or modified vehicle.

 
Multi-body Simulation of Bogies which could be used for virtual certification