Numerical investigation of the effects of rail vibration absorbers on wear behaviour of rail surface
Numerical investigation of the effects of rail vibration absorbers on wear behaviour of rail surface
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DOI：
10.1177/1350650118785061
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发表时间：
2018-06
期刊：
影响因子：
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通讯作者：
W. Qian;Zhiqiang Huang;Huajiang Ouyang;Guangxiong Chen;Hj Yang
中科院分区：
文献类型：
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作者：
W. Qian;Zhiqiang Huang;Huajiang Ouyang;Guangxiong Chen;Hj Yang
钢轨磨耗是指钢轨顶部工作面的周期性磨损。这个问题困扰了铁路行业一百多年。本文研究了钢轨减振器对钢轨表面磨损特性的影响。建立了轮轨-减振器系统的动力学模型。该模型充分考虑了轮轨间的摩擦接触耦合作用。建立了轮轨接触区单位面积质量损失与轮轨单位面积摩擦功成正比的磨损模型，用于分析钢轨表面的磨损行为。数值结果表明，饱和蠕滑力引起的轮轨系统自激振动会导致钢轨表面出现短节距钢轨弯曲。最大磨耗深度出现在各枕间跨中附近。安装钢轨减振器后，可有效抑制短节距钢轨伤损的形成，使钢轨表面磨损均匀，伤损增长速度明显降低。增大减振器与轨腹之间的连接阻尼有利于防止短节距钢轨振动的形成。
Rail corrugation refers to the periodic wear of the top working surfaces of rails. This problem has plagued the railway industry over a hundred years. In the present paper, the effects of rail vibration absorbers on wear behaviour of the rail surface have been studied. The dynamic model of a wheel–rail–absorber system is established. The friction contact coupling between the wheel and the rail are fully considered in this model. A wear model, in which the mass loss of unit area in contact patch is proportional to frictional work per unit area between the wheel and the rail, is developed to analyse the wear behaviour of the rail surface. Numerical results show that the saturated creep force-induced self-excited vibration of the wheel–rail system can result in short pitch rail corrugation on the rail surface. The maximum wear depth occurs at the positions close to mid-span of each sleeper bay. After the installation of rail vibration absorbers, the formation of short pitch rail corrugation can be suppressed effectively, and the wear on the rail surface becomes uniform and the growth rate of rail corrugation reduces considerably. Increasing the connection damping between the absorber and the rail web is beneficial to preventing the formation of short pitch rail corrugation.