气动力作用下高速车辆横向稳定性分析  

Lateral stability of a high-speed train under aerodynamic force

作　　者：李鹏[1] 杨翊仁[2] 鲁丽[2] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610031 [2]西南交通大学力学与工程学院,成都610031

出　　处：《振动与冲击》2010年第11期135-138,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金(10972185);中央高校基本科研业务费专项资金(2010Z707);高等学校博士点基金新教师基金(20070613032)~~

摘　　要：从气动弹性力学角度出发,以17个自由度的高速列车车辆模型为研究对象,基于准定常气动力的假设,建立了气动力作用下的车辆横向运动微分方程。采用特征值分析理论确定了线性系统的临界蛇行速度,分析了气动力对车辆蛇行临界速度及曲线通过性能的影响;采用数值积分方法研究了车辆在气动力和轮缘力联合作用下的极限环响应。结果表明:气动力对高速列车车辆横向稳定性、曲线通过性能及极限环振动有着较为明显的影响。Based on the theory of aero-elasticity,the governing differential equations of a high-speed train model with seventeen degrees of freedom were derived under the supposition of quasi-steady aerodynamic force.Eigenvalue theory was used to investigate the critical hunting velocity.The influence of aerodynamic force on the critical hunting velocity and the curve negotiation performance was analyzed.The limit cycle responses of the nonlinear system with flange forces and aerodynamic forces were studied using the numerical integration method.The results showed that the effects of aerodynamic forces on the lateral stability,the curve negotiation performance and the limit cycle oscillation of the high-speed train are quite obvious.

关 键 词：高速车辆 轮缘力 准定常气动力 蛇形速度 极限环响应 

分 类 号：U270.11[机械工程—车辆工程]