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扣件刚度非线性对波磨区轮轨瞬态滚动接触行为的影响

徐井芒 梁新缘 王凯 赵思琪 王平

徐井芒, 梁新缘, 王凯, 赵思琪, 王平. 扣件刚度非线性对波磨区轮轨瞬态滚动接触行为的影响[J]. 西南交通大学学报, 2024, 59(2): 247-255. doi: 10.3969/j.issn.0258-2724.20211043
引用本文: 徐井芒, 梁新缘, 王凯, 赵思琪, 王平. 扣件刚度非线性对波磨区轮轨瞬态滚动接触行为的影响[J]. 西南交通大学学报, 2024, 59(2): 247-255. doi: 10.3969/j.issn.0258-2724.20211043
XU Jingmang, LIANG Xinyuan, WANG Kai, ZHAO Siqi, WANG Ping. Influence of Fastener Stiffness Nonlinearity on Wheel–Rail Transient Rolling Contact Behavior in Corrugated Area[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 247-255. doi: 10.3969/j.issn.0258-2724.20211043
Citation: XU Jingmang, LIANG Xinyuan, WANG Kai, ZHAO Siqi, WANG Ping. Influence of Fastener Stiffness Nonlinearity on Wheel–Rail Transient Rolling Contact Behavior in Corrugated Area[J]. Journal of Southwest Jiaotong University, 2024, 59(2): 247-255. doi: 10.3969/j.issn.0258-2724.20211043

扣件刚度非线性对波磨区轮轨瞬态滚动接触行为的影响

doi: 10.3969/j.issn.0258-2724.20211043
基金项目: 国家自然科学基金(51608459,51778542,51978586,U1734207)
详细信息
    作者简介:

    徐井芒(1987—),男,副教授,博士,研究方向为高速重载城市轨道交通轨道动力学,E-mail:mang080887@163.com

  • 中图分类号: U213.53;U211.5

Influence of Fastener Stiffness Nonlinearity on Wheel–Rail Transient Rolling Contact Behavior in Corrugated Area

  • 摘要:

    WJ-8型扣件橡胶垫板刚度在长期服役过程中表现出非线性特征,静刚度随荷载增加而降低,为提高三维瞬态滚动接触有限元模型计算精确性,本文以LMA踏面车轮及CHN60型钢轨为基础,基于显式积分算法,将以往研究中线弹性扣件转化为非线性扣件,建立考虑扣件刚度非线性特征的三维轮轨瞬态滚动接触有限元模型,研究刚度非线性对车轮与钢轨波磨间高频动态响应及瞬态接触行为的影响,并重点分析了波磨工况下时频域内轮轨接触力、轴箱加速度的变化信息. 结果表明:扣件非线性对轮轨接触力变化影响明显,主要表现为车轮行驶至扣件前端时强振动导致橡胶垫板表现为柔软特性使轮轨接触力减小,车轮行驶至扣件上方时在轴重作用下振动减弱表现为刚硬特性使轮轨接触力增大,轮轨力变化差异最大达到13.1%.

     

  • 图 1  非线性扣件橡胶垫板力学模型

    Figure 1.  Mechanical model of rubber pad of nonlinear fastener

    图 2  试验测得扣件静刚度与荷载拟合曲线

    Figure 2.  Fitting curve between static stiffness and load of fasteners measured by test

    图 3  三维轮轨瞬态滚动有限元模型

    Figure 3.  Finite element model of three-dimensional wheel–rail transient rolling

    图 4  波磨施加示意

    Figure 4.  Corrugation application

    图 5  不同波深轮轨力时程曲线

    Figure 5.  Time history curves of wheel–rail force with different corrugation depths

    图 6  不同运行速度轮轨力时程曲线

    Figure 6.  Time history curves of wheel–rail force at different operating speeds

    图 7  不同波深/运行速度轮轨力时频图

    Figure 7.  Time-frequency diagrams of wheel–rail force at different corrugation depths/operating speeds

    图 8  不同波深/运行速度轮轨力功率谱曲线

    Figure 8.  Power spectrum curves of wheel–rail force at different corrugation depths/operating speeds

    图 9  不同波深/运行速度轴箱加速度时程曲线

    Figure 9.  Time history curves of axle box acceleration at different corrugation depths/operating speeds

    图 10  轴箱加速度时频图

    Figure 10.  Time-frequency diagrams of axle box acceleration

    图 11  不同波深/运行速度轴箱加速度功率谱曲线

    Figure 11.  Power spectrum curves of axle box acceleration at different corrugation depths/operating speeds

    表  1  模型参数

    Table  1.   Model parameters

    簧上质量/kg车辆一系悬挂簧下质量车轮及钢轨材料
    刚度/
    (MN·m−1
    阻尼/
    (kN·s·m−1
    车轮质量/kg轮下附属部件质量/kg弹性模量/
    GPa
    密度/
    (kg·m−3
    泊松比阻尼常数
    60000.88465634021077900.30.0001
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出版历程
  • 收稿日期:  2021-12-16
  • 修回日期:  2022-04-27
  • 网络出版日期:  2023-12-19
  • 刊出日期:  2022-05-07

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