| Abstract: | With the vehicle speed increase, wheel-rail dynamic coupling becomes stronger and shows more prominent. It may lead to derailment of the vehicle. Based on an improved three-dimensional wheel-rail contact trace algorithm and a new model of wheel-rail contact force, wheel-rail derailment dynamical model is established on CRH vehicle and developed in MATLAB software, which is called dynamical derailment system for CRH (DDSCRH). Analyzed on dynamical derailment process of high speed vehicle by DDSCRH, the critical position on climb wheel and influence factors on lateral force for derailment is obtained. Finally, high-speed vehicle dynamical simulation is verified on DDSCRH by comparing with the results of line test. |
