Adaptive meshing scheme for prediction of high-speed moving loads induced ground vibrations

This article proposes an advanced modeling of the vibrations induced by high speed time-variant moving loads. The model considers the complex mutual dynamic coupling between the track components and the subgrade layer, thus a high realistic simulation of force transmission from rail interface to soil is involved. An adaptive meshing scheme is proposed to simulate the moving loads effect. The spatiotemporal mesh parameters are investigated within the frame of adaptive meshing. Numerical experiments carried out in the sub-Rayleigh and super-Rayleigh velocity ranges show an important capacity of the proposed scheme to model the impact of moving loads on ground response.