| 考虑摩擦因数与滑动速度相关时的轮轨滚动接触有限元分析 |
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| 引用本文： | 肖乾,周新建,王成国,车宇翔.考虑摩擦因数与滑动速度相关时的轮轨滚动接触有限元分析[J].润滑与密封,2012(1):1-5. |
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| 作者姓名： | 肖乾 周新建 王成国 车宇翔 |
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| 作者单位： | 中国铁道科学研究院铁道科学技术研究发展中心;华东交通大学载运工具与装备教育部重点实验室 |
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| 基金项目： | 国家自然科学基金项目(51005075);铁道部科技项目(J2009G003);江西省自然科学基金项目(2010GQC0034);国家863重点项目(2009AA110302) |
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| 摘 要： | 使用与滑动速度相关的摩擦因数替代库伦摩擦定律中的常系数,结合mixed Lagrangian/Eulerian方法建立轮轨滚动接触有限元模型,分析牵引力主导的蠕滑工况下的干燥状态的轮轨滚动接触特性。通过与摩擦因数取值为常数的轮轨滚动接触分析结果对比发现:与滑动速度相关的摩擦因数对轮轨滚动接触最大接触应力和接触斑面积影响不大,均在1%以内;但是对轮轨接触斑内最大Mises应力、最大纵向切应力、最大横向切应力和最大等效塑性应变影响较大,特别是对最大纵向切应力影响幅度近20%;更需要引起注意的是对轮轨滚动接触摩擦力矢量分布和切向塑性应变分布影响明显,这对轮轨滚动接触疲劳损伤分析非常重要。
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| 关 键 词： | 滑动速度 摩擦因数 轮轨滚动接触 有限元分析 |
The Finite Element Analysis of Wheel/Rail Rolling Contact with Friction Coefficient Related with Sliding Speed |
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| Xiao Qian,Zhou Xinjian,Wang Chengguo,Che Yuxiang.The Finite Element Analysis of Wheel/Rail Rolling Contact with Friction Coefficient Related with Sliding Speed[J].Lubrication Engineering,2012(1):1-5. |
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| Authors: | Xiao Qian Zhou Xinjian Wang Chengguo Che Yuxiang |
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| Affiliation: | 1.Railway Science and Technology Research and Development Center,China Academy of Railway Sciences,Beijing 100081,China;2.Key Laboratory of Ministry of Education for Conveyance and Equipment, East China Jiaotong University,Nanchang Jiangxi 330013,China) |
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| Abstract: | Combined with mixed Lagrangian/Eulerian method,the finite element model of wheel/rail rolling contact was established by using friction coefficient associated with sliding speed alternative to the constant in law of Coulomb friction.The characteristics of wheel/rail rolling contact in dry state of traction creep condition were analyzed.Compared with results of finite element analysis in constant friction coefficient,it is found that the friction coefficient related with sliding speed of wheel-rail rolling contact has little effect on the maximum contact stress and contact patch area,which are less than 1%.But the varied friction coefficient has great impact on maximum Mises stress,the maximum longitudinal shear stress,the maximum transverse shear stress and maximum equivalent plastic strain in wheel/rail contact patch,especially on the maximum longitudinal shear stress by nearly 20%.It is very important to know that significantly diversification of tangential attention friction force vector distribution and plastic strain distribution of wheel/rail rolling for varied friction coefficient,which is basic data for damage analysis. |
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| Keywords: | sliding velocity friction coefficient wheel/rail rolling contact finite element analysis |
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