Experimental and numerical study on carbody hunting of electric locomotive induced by low wheel?rail contact conicity
Experimental and numerical study on carbody hunting of electric locomotive induced by low wheel?rail contact conicity
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低轮轨接触锥度引起电力机车车体摆动的实验与数值研究
DOI：
10.1080/00423114.2019.1674344
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发表时间：
2019
影响因子：
3.6
通讯作者：
Li Wei
中科院分区：
文献类型：
--
作者：
Sun Jianfeng;Chi Maoru;Jin Xuesong;Liang Shulin;Wang Jian;Li Wei
在铁路轨道的特定位置，内拐角处的过度抛光的钢轨和大的钢轨倾斜将导致极低的轮轨接触锥度。因此，车体蛇行不稳定性增加，并降低了乘客的乘坐舒适性。本文对电力机车车体蛇行不稳定性进行了观测和试验。结合轮轨接触和轨道状态分析，对列车的平顺性和运行稳定性指标进行了评价。建立了机车的动力学模型。将实测的轮轨型线、曲线半径和超高等参数融入仿真模型中，再现了车体蛇行在直线段剧烈，而在曲线段异常振动消失的现象。为解决车体蛇行不稳定问题，对悬挂参数的优化进行了线性化和非线性研究。最后，提出了减小偏航阻尼器串联刚度、阻尼和一系纵向刚度的优化措施，并通过实车试验进行了验证。本文的研究丰富了车体蛇行失稳的研究，为解决车体异常振动问题提供了思路。
In particular locations of the railway track, the excessively polished rail in the inner corner and the large rail cant will lead to an extremely low wheel–rail contact conicity. Consequently, the carbody hunting instability arises and deteriorates the ride comfort of passengers. In this paper, the carbody hunting instability of an electric locomotive is observed and tested. Combined with the analysis of wheel–rail contact and track condition, the ride comfort and running stability indices are evaluated. The dynamic model for the locomotive is established. The measured wheel and rail profiles as well as the curve radius and superelevation are integrated into the simulation model to reproduce the phenomenon that the carbody hunting displayed violent in the straight line while the abnormal vibration disappeared in the curve segment. The linearised and non-linear study on the optimisation of suspension parameters are carried out to solve the carbody hunting instability. Finally, the optimised measures that decreasing the series stiffness and damping of the yaw damper as well as the primary longitudinal stiffness are put forward, and verified by the on-track test. The investigation enriches the study of carbody hunting instability and gives some ideas to probably solve the abnormal vibration.