摘要
为了解决地铁车辆踏面过度磨耗、剥离、失圆及产生的车体垂向动力学性能超标问题,通过车辆结构理论分析及动力学仿真,研究了牵引杆的附加刚度效应.结果表明:车辆制动系统不是导致上述问题发生的主要原因,短牵引杆及其两端大的连接刚度引起的附加刚度效应是导致车体对垂向振动冲击敏感的根源;在车辆制动或通过曲线轨道时,牵引杆装置的附加刚度效应可降低二系悬挂系统的隔振能力;考虑牵引杆的附加刚度效应时,车辆对垂向振动的冲击响应显著增大;将牵引杆的连接刚度减小到现有刚度的25%时,可以降低车体对垂向冲击的响应,改善车辆的垂向动力学性能.
To solve the wheel wear problems of the subway vehicles such as wheel tread wear, spalling, wheel out of round, and the problem that the vertical vibration of car body and the vertical ride index exceed the standard values, the additional stiffness function of the traction bar was studied through theoretical structure analysis and dynamic simulation. The results show that the vehicle braking system was not the main cause of the above problems, and that the additional stiffness function caused by the short length of the traction bar and the bigger connection stiffness on the ends are the main reason why the car body is sensitive to vertical impact. For the vehicle in braking condition or running on curve, the damping function of the secondary suspension decreases due to the additional stiffness of the traction bar system. The response of the car body to the vertical impact increases significantly if the additional stiffness function of the traction bar system is taken into account. The vertical dynamic response and vertical dynamic performance of the subway vehicle can be improved efficiently by decreasing the connection stiffness of the traction bar to 25 %.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2011年第6期979-983,995,共6页
Journal of Southwest Jiaotong University
基金
国家自然科学基金青年科学基金资助项目(51005190)
霍英东教育基金资助项目(122014)
教育部博士点新教师基金资助项目(20090184120006)
中国博士后基金资助项目(20100471655)
关键词
地铁
轮对
牵引杆
垂向动力学
subway
wheel set
traction bar
vertical dynamics
