高速列车空气动力制动会车动力学性能

Dynamics Performance of High-speed Train with Aerodynamic Brake Under Crossing

采用流体力学模拟两列高速列车以400km·h-1速度交会时工况,计算列车气动载荷,并结合高速列车动力学模型研究会车工况下制动风翼板开启对列车动力学性能及运行安全性影响.结果表明:交会时列车横向及垂向位移及振动加速度均增大;与未采用空气动力制动相比,制动风翼板开启后车体振动加速度、列车最大脱轨系数、轮重减载率等均发生变化,但其运行安全性指标均在合格范围内.

Based on the aerodynamic loads calculated by fluid dynamics and the high-speed dynamic model, the influence of braking panels on vehicle vibrations and running safety were studied on the condition that two trains crossed each other both at the speed of 400 km · h -1, which meant the relative velocity was 800 km · h -1. The results show that the displacement and vibration acceleration of car bodies increase a lot when the two trains cross each other. In comparison with the model without opening braking panels, the safety coefficients, such as derailment coefficients, wheel load reduction rates, are different. However, all the results satisfy the safety standards.