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异物致损铁道车轴的疲劳强度及寿命评估

吴圣川 罗艳 王文静 李永恒 胡春明

吴圣川, 罗艳, 王文静, 李永恒, 胡春明. 异物致损铁道车轴的疲劳强度及寿命评估[J]. 力学学报, 2021, 53(1): 84-95. doi: 10.6052/0459-1879-20-228
引用本文: 吴圣川, 罗艳, 王文静, 李永恒, 胡春明. 异物致损铁道车轴的疲劳强度及寿命评估[J]. 力学学报, 2021, 53(1): 84-95. doi: 10.6052/0459-1879-20-228
Wu Shengchuan, Luo Yan, Wang Wenjing, Li Yongheng, Hu Chunming. FATIGUE STRENGTH AND RESIDUAL LIFETIME ASSESSMENT OF RAILWAY AXLES SUBJECTED TO FOREIGN OBJECT DAMAGE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2021, 53(1): 84-95. doi: 10.6052/0459-1879-20-228
Citation: Wu Shengchuan, Luo Yan, Wang Wenjing, Li Yongheng, Hu Chunming. FATIGUE STRENGTH AND RESIDUAL LIFETIME ASSESSMENT OF RAILWAY AXLES SUBJECTED TO FOREIGN OBJECT DAMAGE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2021, 53(1): 84-95. doi: 10.6052/0459-1879-20-228

异物致损铁道车轴的疲劳强度及寿命评估

doi: 10.6052/0459-1879-20-228
基金项目: 1)中国铁路总公司系统性重大项目自主探索研究课题(P2019J002);中国铁路总公司系统性重大项目自主探索研究课题(2021TPL_T06);牵引动力国家重点实验室川藏铁路项目群(2019-Q05);北京市科技新星计划资助(Z191100001119001)
详细信息
    作者简介:

    3) 王文静, 教授, 主要研究方向: 结构的损伤、疲劳与断裂. E-mail:wjwang@bjtu.edu.cn
    2) 吴圣川, 研究员, 主要研究方向: 车辆结构完整性评估. E-mail: wusc@swjtu.edu.cn;

    通讯作者:

    吴圣川

    罗艳

    吴圣川,罗艳,王文静

  • 中图分类号: O346.1

FATIGUE STRENGTH AND RESIDUAL LIFETIME ASSESSMENT OF RAILWAY AXLES SUBJECTED TO FOREIGN OBJECT DAMAGE

  • 摘要: 车轴是高速列车关键承载部件, 承受着源自车体、轨道的各种载荷,其疲劳行为直接关乎列车运行安全. 疲劳裂纹往往具有较强的隐蔽性和突然性,由车轴断裂发生的列车脱轨事件具有灾难性,因此确保车轴在运行中不发生失效事故, 对高速列车可靠运行至关重要.高速列车实际运营中, 车轴外表面受到各种异物击打, 会形成深度达毫米级的缺陷,破坏车轴表面完整性, 严重威胁车辆安全.本研究采用空气炮装置预制合金钢车轴小试样异物致损(foreign object damage, FOD)缺陷,采用扫描电子显微镜和体视显微镜观测损伤特征.开展高周疲劳试验获得光滑试样和FOD损伤小试样的疲劳S-N曲线,考虑载荷模式、表面质量和尺寸系数推证出全尺寸车轴的疲劳性能.断口分析表明, 裂纹于FOD附近多处位置萌生, 并在不同平面内连续扩展,最终汇聚为一个半椭圆形裂纹. 基于Peterson公式和El Haddad模型估算异物冲击速度100 m/s和138 m/s试样的理论疲劳极限远低于试验结果, 过于保守; 同时也远低于标准推荐值, 偏于危险. 最后,采用修正的Miner理论公式估算含FOD实物车轴的服役寿命,满足最低25年的服役寿命.

     

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  • 收稿日期:  2020-06-29

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