Moving mesh domain adaptation technique - application to train induced wave propagation

TL;DRAbstract

Railways are an important part of the infrastructure in the society and the cost for their construction and maintenance is significant. Hence, understanding, predication andimprovement of their performance is vital to utilize the resources in the best possible manner. Mathematical modeling and simulation of the railway mechanics provides a methodology to achieve this goal.In previous work, see e.g. [1]-[2], an integrated dynamic model of the entire 3D vehicle - track - underground system has been developed. The train has been modelled by rigid bodies, springs and dampers. The track and the underground have been modelled as elastic solids by FEM. This model has been successfully used to simulate and study the train induced wave propagation, see [1]-[2]. However, the size of the FE domain of the track and underground hasbeen limited to approximately 200 m due to high computational cost (time). Hence, it has onlybeen possible to follow the train running for about 200 metres.To be able to

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