Numerical Simulation of High-Speed Maglev Vehicle-Guideway-Tunnel-Soil System

摘要

In order to study the dynamic problem due to the high-speed EMS maglev vehicle travelling through a tunnel, this paper presents a large-scale 3D model of the maglev vehicle-guideway-tunnel-soil coupling system. The 3D finite element is used for modeling the guideway-tunnel-soil system, and the heterogeneous soil conditions, detailed geometry features of guideway and tunnel, and soil-tunnel interaction are all considered. The high-speed EMS maglev vehicle is modeled as rigid bodies and coupled to the guideway through the equivalent spring/damping magnetic force model. The initial stress of the guideway-tunnel-soil is also considered in the model by the stress reduction method. The computing is accomplished on a Dawning 5000A supercomputer using the finite-element code LS-DYNA 971 MPP. The dynamic factor of the guideway is estimated in comparison with the German design guideline. The result provides a comprehensive insight into the tunnel and guideway, as well as the ground vibration.