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混运模式下钢轨打磨廓形对客货车车轮磨耗的影响研究
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Influence of Rail Grinding Profile under Mixed Transportation Mode on Passenger and Freight Car Wheels Wear
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    摘要:

    针对当前铁路既有线通常采用客货混运模式的现状,以LM踏面客货车车轮分别与CHN60钢轨和打磨后钢轨进行匹配,分析不同匹配下的轮轨接触几何关系;考虑材料弹塑性以及车轮的惯性力,采用mixed Lagrangian/Eulerian方法建立三维轮轨滚动接触有限元模型;基于2种不同的磨耗模型,研究混运模式下钢轨打磨对客货车车轮磨耗的影响。结果表明:钢轨打磨使得客货车的轮轨接触几何关系发生改变,打磨后的钢轨与客车车轮接触Mises应力减小,而与货车车轮接触Mises应力变化不大;同一钢轨分别与客货车车轮接触时,货车车轮的磨耗比客车车轮磨耗大;钢轨的打磨会降低轮轨接触斑内的牵引力从而降低车轮磨耗,这对于延长轮轨的使用寿命非常有利。

    Abstract:

    As the mixed transportation mode is often used in the existing railway lines at present,by using a LM profile of passenger and freight car wheels to match with CHN60 rail and grinding profile rail respectively,the wheel/rail contact geometry relationship was analyzed.By taking the material elastoplasticity and inertia force into consideration,a 3D wheel/rail rolling contact steadystate model was established by using mixed Lagrangian/Euler method.Based on two wear model,the wear of passenger and freight car wheels before and after the rail grinding was studied and predicted.Results show that wheel/rail contact geometry relationship is changed after the rail grinding,and the Mises stress in the passenger car wheel is decreased,while the stress is almost the same of the freight car wheel.When a rail contacts with passenger and freight car wheels separately,the wear of freight car wheel is larger than that of passenger car wheel.The rail grinding would reduce the wheel/rail contact tangential force and reduce the wear of the wheels.This is very beneficial to extend the service life of wheel/rail.

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罗会源.混运模式下钢轨打磨廓形对客货车车轮磨耗的影响研究[J].润滑与密封,2016,41(8):108-113.
LUO Huiyuan. Influence of Rail Grinding Profile under Mixed Transportation Mode on Passenger and Freight Car Wheels Wear[J]. Lubrication Engineering,2016,41(8):108-113.

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  • 在线发布日期: 2016-09-13
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