论文部分内容阅读
为研究裙板安装对高速列车气动阻力及侧风安全稳定性的影响,用计算流体力学(Computational Fluid Dynamics,CFD)方法分析国外某高速列车转向架及其周边裙板结构对整车气动性能的影响.在无侧风且列车行驶速度为350km/h时,模拟分析不安装裙板及在不同位置安装裙板情况下列车的气动性能;在有强侧风情况下,模拟分析列车在50～350km/h之间不同行驶速度工况时的气动性能.结果表明,列车底部安装裙板可有效降低列车气动阻力,在头尾第1对转向架处安装裙板对列车气动阻力的降低最有效;在强侧风下,列车底部安装裙板会造成列车的侧向力和侧翻力矩加大,降低列车行驶安全性.
In order to study the influence of apron installation on the aerodynamic drag and safety of high speed trains, Computational Fluid Dynamics (CFD) method was used to analyze the aerodynamic performance of a high speed train bogie and its peripheral skirts on the whole vehicle In the absence of crosswind and train speed of 350km / h, the aerodynamic performance of the train without the apron installed and the apron installed at different positions was simulated and analyzed. In the case of strong crosswind, 350km / h.The results show that the installation of apron on the train bottom can effectively reduce the aerodynamic drag of the train, and it is most effective to reduce the aerodynamic drag on the first pair of bogies In strong crosswind, the installation of apron on the train bottom will increase the lateral force and rollover moment of the train, reducing the safety of the train.