11:25 AM - 11:40 AM
[22007-12-06] Influence of modeling of spatial variation of surface profile on simulated dynamic response of railway track (Proceedings of Symposium on Applied Mechanics)
Keywords:rail surface profile, stochastic FEM, stochastic collocation method, spatial variation, covariance kernel
The variation of wheel-rail contact force induced by the spatial variation of surface profile of rails is simulated with the stochastic FEM (SFEM) and the stochastic collocation method. The spatial variation of rail surface profile is prescribed with Karhunen-Loeve expansion. The covariance kernel of the surface profile is modeled with 6-type functions. The influence of modeling of the spatial variation of the surface profile on the simulated force is isvestigated through numerical tests.