Simulation models based on the state-of-the-art computational tools will be developed for showing how incipient and abrupt faults will change the dynamic responses. Holistic models on the macro and micro scales will give insights into stress, deformation (strain) and accelerations experienced by the various parts of S&Cs during train passage with a high level of fidelity. After experimental validation such computer models will be used to advance our understanding of the complex interaction among all subsystems under nominal and critical operation conditions. The calculated responses will be functions of the overall condition of the S&C, and of its individual components and geometrical properties, as well as train mass and passage velocity. When components become worn out and plastically deformed, the calculations will in principle show how incipient and abrupt faults will change the dynamic responses during train passage. The modelling is expected yield the following results:
- Development of a holistic mathematical model that can describe soil-ballast-sleeper-pad-rail-wheel dynamic interactions.
- Identify parameters which are signs of degradation.
- Provide guidelines on how to best avoid faults from developing.