动态接触在高速铁路轮轨接触动力仿真中的运用

Wheel /rail contact dynamic simulation application based on dynamic contact in high speed railway

针对高速铁路轮轨动态接触问题,根据Lagrangian增量法建立轮轨的非线性运动方程,应用动态接触算法中的对称罚函数法建立了轮对与钢轨接触的三维仿真计算模型,分析不同的接触位置的轮轨接触,得出了轮轨法向接触力和切向接触力的变化规律。结果表明,显式积分法求解非线性系统瞬态响应时不用考虑切线刚度和收敛控制问题,比隐式积分更为优势,运用动态接触算法计算的法向接触力比Hertz理论与实际更相符。

Concerning the high speed railway wheel/rail dynamic contact problems, the wheel/rail nonlinear equation of motion was established based on Lagrangian incremental method, meanwhile the wheel and rail contact 3D simulation model was also established according to the dynamic contact algorithm of symmetric penalty function method. Wheel/rail contact in the different contact position was analyzed, the variation of nomal contact force and tangent contact force for the wheel/rail were obtained. The results show that, explicit integral calculation is better than implicit integration method to solve nonlinear system transient response, because it needs not consider tangent stiffness and convergence control problem, and the nomal contact force calculated with dynamic contact method is more close to reality.