钢轨异常磨耗对构架横向加速度影响研究

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摘要针对某型高速动车运行过程中转向架构架横向加速度报警的问题，构建了车辆多体动力学模型，结合实测磨耗钢轨外形，研究了异常磨耗钢轨与构架横向加速度报警间的关系。仿真分析发现当动车高速运行于实测的轨道不平顺线路上时，长期未打磨钢轨区段对应的轮对、构架横向加速度明显要大于一次打磨和二次打磨钢轨。随着钢轨磨耗加剧，轮轨接触等效锥度也呈上升的趋势，降低了车辆稳定性。并且通过现场实验验证长期未打磨钢轨对应构架横向加速度明显大于新打磨钢轨。研究结果表明：钢轨轨面长期未打磨而出现不正常的宽光带磨耗与轨距角磨耗增大了轮轨间等效锥度，是导致轮轨接触不良主要原因，而轮轨接触不良是造成动车组构架横向稳定性变差的重要因素。

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	王晨1
	邬平波1
	罗世辉1
	许自强2
	马卫华1
	董孝卿2

关键词 ：高速动车组, 构架, 钢轨异常磨耗, 加速度报警, 实验

Abstract：For exploring the causes of altered bogie lateral accelerations of certain high speed trains, this paper aims at analyzing the relationship between the profile of worn rails and the dynamic behaviors of such high speed trains.A dynamic model was developed with actual measured wheel and rail profiles.The effect of the worn wheel/rail relationship on transverse vibration of the bogie frame was investigated.Simulation results indicated that the lateral acceleration of wheelsets and the bogie frame running on long-term unpolished rails was remarkably higher than those on rails with once and twice polishment.During the testing process, the equivalent conicity would increase with running distance for unpolished rails.The main reason for poor contact between wheel and rail was found to be gauge angle worn and the camber worn rail has not been polished for a long time.

Key words： High-Speed train Bogie frame Abnormal worn rail Acceleration alarm Field test

收稿日期: 2018-05-29 出版日期: 2019-10-15

引用本文:

王晨1，邬平波1，罗世辉1，许自强2，马卫华1，董孝卿2. 钢轨异常磨耗对构架横向加速度影响研究[J]. 振动与冲击, 2019, 38(20): 244-251.
WANG Chen1，WU Pingbo1，LUO Shihui1，XU Ziqiang2，MA Weihua1，DONG Xiaoqing2. A study on the effect of an abnormal worn rail on the lateral acceleration of a bogie frame. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(20): 244-251.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I20/244

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