地基刚度对三维非线性轮轨接触的动力影响

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摘要研究目的:为了进一步探明地基刚度对轮轨接触的影响，以轮轨接触三维实体非线性有限元模型为研究对象，采用瞬态动力学分析方法，在轨道不平顺的条件下研究地基刚度对轮轨接触的动力影响。

研究结论:结果表明:(1)车轮的总位移主要是地基的弹性变形，在不平顺激励力的作用下，地基刚度对轮轨的位移、应力等影响较大，选取合理的地基刚度可以降低轮轨之间的应力;(2)通过分析列车速度和轮重对轮轨竖向位移、接触应力以及加速度的影响，得出合理的地基刚度为600-1 000 MPa/m; ( 3)本文所总结的轨道不平顺条件对轮轨接触的影响规律，以及车速、轮重、地基刚度对轮轨振动的影响规律对高速列车的地基和轮轨接触设计具有参考作用。

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	吴亚平
	许贵满
	段志东
	王良璧
	车鸿博

关键词 ：轨道不平顺, 地基刚度, 非线性, 轮轨, 接触应力

Abstract：Research purposes:In order to further proven the effect of foundation stiffness on wheel-rail contact，this paper used three-dimensional solid nonlinear finite element model of the wheel-rail contact as the object of study， adopts the transient dynamic analysis method，researches the dynamic response of foundation stiffness on wheel-rail contact under the condition of track irregularity.

Research conclusions ; The total displacement of the wheel is mainly the elastic deformation of the foundation，under the action of exciting force which is irregularity，foundation stiffness has greater impact on wheel-rail displacement，stress， etc. The stress between wheel and rail can be reduced through selecting the rational foundation stiffness. By analyzing the effect of the train speed and the wheel weight on vertical displacement of wheel-rail，contact stress and acceleration，a reasonable foundation stiffness 600 MPa/m-1 000 MPa/m was proposed. The laws of this paper summed，which includes the influence of track irregularity on wheel-rail contact conditions，and the influence of the vehicle speed，wheel weight，and foundation stiffness on wheel-rail vibration，can provide reference for the design of the foundation and wheel-rail contact of high-speed trains.

Key words： track irregularity foundation stiffness nonlinear wheel-rail contact stress

收稿日期: 2013-11-15

PACS:

U211.5

基金资助:国家自然科学基金重点项目(51236003)

作者简介: 吴亚平，1958年出生，男，教授

引用本文:

吴亚平,许贵满,段志东,王良璧,车鸿博. 地基刚度对三维非线性轮轨接触的动力影响[J]. 铁道工程学报, 2014, 31(5): 28-34.
WU Ya-ping,XU Gui-man,DUAN Zhi-long, WANG Liang-bi，CHE Hong-bo. Dynamic Effect of Foundation Stiffness on Three-dimensional Nonlinear Wheel-rail Contact. Journal of Railway Engineering Society, 2014, 31(5): 28-34.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2014/V31/I5/28

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