CRH3A型动车组异常振动分析及解决方法研究

Study on Abnormal Vibration and Solution for CRH3A EMU

摘要: 针对CRH3A型动车组在运行过程中在特定地点出现异常抖动的情况，调查了异常抖动车组的车辆状态，分析了车辆与实际钢轨匹配的等效锥度和轮轨接触关系。通过对CRH3A型动车组等效锥度进行分析，结果表明：CRH3A型动车组镟修周期内踏面凹型磨耗严重，在与实际磨耗轨匹配时，接触点存在跳跃情况，以至于轮轨实际匹配等效锥度过大，轮轨匹配关系不佳，通过合理制定钢轨打磨方案，及时安排车组镟修，可有效改善轮轨匹配关系。

Abstract: The abnormal vibration of CRH3A EMU at some specific locations is investigated, and the equivalent conicity of wheelset and wheel-rail contact relationship for the actual rail and wheel were analyzed. Through the analysis of the equivalent conicity of CRH3A, the results show that the wheel wear of CRH3A is serious during the turning repair cycle. The wheel matching with the actual rail, there is a jump at the contact point, so that the equivalent conicity of the actual wheel-rail matching is too large, and the wheel-rail matching relationship unreasonable. Through the reasonable formulation of the rail grinding and the timely arrangement of the wheelsets repair, the wheel-rail matching relationship can be effectively improved.