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城轨车辆以其方便、快捷的优点在大型城市的公共交通领域发挥着越来越大的作用.但是,在给人们带来方便的同时,城轨车辆的噪声问题也给沿线居民增添了很多烦恼.实际运行经验表明,当车轮踏面损伤后,轮轨噪声会不可避免地增大,良好的轮轨关系是降低城轨车辆噪声的根本途径.本文针对国内某城轨车辆在实际运行中出现的车轮踏面损伤问题进行研究,发现该车辆的轮对在运行一段时间后,在轮对踏面与轮缘的交接处就会有大量鱼鳞状剥离出现,并同时伴有车体的垂向振动加大的现象.结构分析发现,车体与构架间的牵引杆长度较小,当轮对受到较大的垂向冲击时,会导致车体与构架形成刚性连接.仿真分析发现将牵引杆两端改为大的橡胶关节连接后,可显著改善车辆的垂向动力学性能,同时,这也有利于缓解车轮的损伤情况.
Because of its convenience and speed, urban rail vehicles play an increasingly important role in the public transport in large cities, however, while bringing convenience to people, the noise of urban rail vehicles also adds a lot of noise Troubles.The actual operation experience shows that when the wheel tread damage, the wheel and rail noise will inevitably increase the good wheel-rail relationship is to reduce the urban rail vehicle noise fundamental way.In this paper, a domestic urban rail vehicles in the actual operation of the emergence of Of the wheel tread damage study and found that the wheel of the vehicle after running for some time, the wheel tread and the rim of the junction there will be a large number of fish scale-like stripping occurs, accompanied by the vertical vibration of the body plus Large structure.It is found from the analysis of the structure that the length of the tow bar between the body and the frame is small and when the wheelset is subjected to a large vertical impact, it will result in a rigid connection between the body and the frame.From the simulation analysis, Changing to a large rubber articulation significantly improves the vertical dynamics of the vehicle and, at the same time, helps to alleviate the wheel’s damage.