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考虑打磨量的重载钢轨打磨廓形优化设计

吴磊 康彦兵 董勇 张华鹏

吴磊, 康彦兵, 董勇, 张华鹏. 考虑打磨量的重载钢轨打磨廓形优化设计[J]. 西南交通大学学报, 2022, 57(4): 805-812. doi: 10.3969/j.issn.0258-2724.20210120
引用本文: 吴磊, 康彦兵, 董勇, 张华鹏. 考虑打磨量的重载钢轨打磨廓形优化设计[J]. 西南交通大学学报, 2022, 57(4): 805-812. doi: 10.3969/j.issn.0258-2724.20210120
WU Lei, KANG Yanbing, DONG Yong, ZHANG Huapeng. Optimal Design of Heavy-Haul Rail Grinding Profile Considering Grinding Amount[J]. Journal of Southwest Jiaotong University, 2022, 57(4): 805-812. doi: 10.3969/j.issn.0258-2724.20210120
Citation: WU Lei, KANG Yanbing, DONG Yong, ZHANG Huapeng. Optimal Design of Heavy-Haul Rail Grinding Profile Considering Grinding Amount[J]. Journal of Southwest Jiaotong University, 2022, 57(4): 805-812. doi: 10.3969/j.issn.0258-2724.20210120

考虑打磨量的重载钢轨打磨廓形优化设计

doi: 10.3969/j.issn.0258-2724.20210120
基金项目: 国家自然科学基金(51605395);四川省科技计划(2020YJ0034, 2020JDTD0012, 2020YFQ0024, 2019YJ0209)
详细信息
    作者简介:

    吴磊(1981—),男,讲师,博士,研究方向为轮轨关系,E-mail:wuleitpl@swjtu.edu.cn

  • 中图分类号: V221.3

Optimal Design of Heavy-Haul Rail Grinding Profile Considering Grinding Amount

  • 摘要:

    为在重载钢轨打磨廓形优化设计中最小化钢轨打磨量,建立了打磨量的钢轨廓形对齐及计算方法,设计以轮轨磨耗指数、轮轨接触应力以及钢轨打磨量为优化子目标的综合优化评价模型,并对不同优化策略的优化结果进行了分析. 首先,通过矩阵旋转变换、曲线拟合及样条插值等理论建立钢轨廓形自动对齐算法,并计算目标廓形打磨量;其次,考虑轮轨磨耗指数、接触应力以及钢轨打磨量,建立综合优化目标函数,采用遗传算法并联合车辆轨道动力学仿真模型求解优化钢轨打磨廓形;最后,运用所建立的钢轨廓形优化设计模型计算分析不同优化策略的设计结果. 研究结果表明:同时考虑轮轨磨耗、轮轨接触应力和钢轨打磨量,优化后曲线外、内轨廓形平均磨耗指数相比初始廓形下降68.9%,内轨接触应力下降39.1%,打磨量下降21.8%,优化效果最佳;只考虑轮轨磨耗和接触应力时,优化后曲线外轨廓形磨耗指数和内轨接触应力下降较为明显,但打磨量下降速率相对较慢,仅为11.3%;只考虑打磨量时,优化后钢轨廓形打磨量下降最快,为24.4%,但轮轨接触应力显著变大.

     

  • 图 1  钢轨廓形几何型面

    Figure 1.  Geometric profile of rail

    图 2  实测钢轨廓形旋转预处理

    Figure 2.  Pre-processing of measured rail profile rotation

    图 3  实测廓形与目标廓形内侧直线段平行示意

    Figure 3.  Parallelling of the straight line inside between the measured profile and the target profile

    图 4  钢轨廓形横向对齐流程

    Figure 4.  Flowchart for horizontal alignment of rail profile

    图 5  实测廓形与目标廓形横向对齐示意

    Figure 5.  Horizontal alignment between the measured profile and the target profile

    图 6  实测廓形与目标廓形垂向对齐示意

    Figure 6.  Vertical alignment between the measured profile and the target profile

    图 7  轮对磨耗指数迭代演化过程

    Figure 7.  Iterative evolution process of wheelset wear index

    图 8  一位轮对接触应力指数迭代演化过程

    Figure 8.  Iterative evolution process of the first wheelset contact stress index

    图 9  钢轨打磨量指数迭代演化过程

    Figure 9.  Iterative evolution process of grinding amount index

    表  1  优化策略

    Table  1.   Optimization strategies

    工况磨耗权重系数应力权重系数打磨量权重系数
    1 0.0833 0.1095 0.8072
    2 0.4585 0.5515 0
    3 0 0 1
    下载: 导出CSV

    表  2  外轨磨耗和内轨接触应力

    Table  2.   High rail wear and low rail contact stress

    工况外轨磨耗指数/N内轨应力/MPa
    实测廓形 12482.01294.0
    1105.1770.5
    2133.8868.3
    3109.82201.0
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-02-03
  • 修回日期:  2022-01-04
  • 刊出日期:  2022-01-14

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