侧风环境下列车高速交会流固耦合振动安全性分析

为了防止侧风环境下列车高速交会压力波对车体结构造成破坏，以及气动载荷冲击对运行安全性的影响，综合计算流体动力学的有限体积法和列车多体系统动力学仿真方法，从流固耦合关系出发，同时对侧风环境下列车高速交会的外流场和列车系统动力响应进行分析，从而考察会车压力波、气动冲击、车体响应和列车运行安全性。计算结果表明：背风侧列车会车压力波头波大于迎风侧列车，而尾波则小于迎风侧列车，最大压力波动出现在背风侧列车。侧风环境下列车高速交会时，彼此具有挡风作用，安全性指标出现波动，列车运行安全性短时间内有所改善。

Analysis of Fluid-Solid Coupling Vibration Safety of Train Passing by each other at High-Speed in Side Wind

In order to avoid structural deterioration caused by pressure wave and running safety effected by aerodynamic force impulse when trains passing by each other at high-speed in side wind, from Fluid-Solid Coupling friendship, the flow field equations and dynamics equations of multi-body systems were solved at the same time by integrating the Finite Volume Method of Computational Fluid Dynamics and numerical simulation method of Multi-Body Systems Dynamics. And the pressure wave, aerodynamic impulse, carbody response and running safety were studied. The results show that, the bow wave of pressure wave on upwind train is bigger than that on leeward train, and the tail wave on upwind train is smaller than that on leeward train, maximum pressure wave appears on upwind train. A train screens the other against the wind and safety indices change, the running safety get better in a short time when trains passing by each other at high-speed in side wind.