Full-Scale 3D Heavy Haul Train-Track Dynamics Modelling Method

Full-scale 3D train-track dynamics simulations for long heavy haul trains have not been reported. Successful implementations of such simulations can unlock a series of research topics such as vehicle derailments in train operational environment and track dynamics behaviour under train forces. This paper introduces a method that can be used to develop 3D train-track dynamics models for long heavy haul trains. The method uses parallel computing for 3D train dynamics simulations, in which one computer core is used to compute each vehicle of the train. Rails are modelled using the Finite Element Method and then decomposed into shorter sections by using the Domain Decomposition Method. Parallel computing is then used to simulate individual track sections by using one computer core per track section. Individual computer cores exchange information about coupler forces, vehicle statuses, wheel-rail contact forces and track domain boundary conditions. Hundreds of computer cores are required, therefore, a High Performance Computer or cluster is required to perform such modelling and simulation.