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Research on the load spectrum distribution and structure optimization of locomotive traction seats

机译：机车牵引座椅的载荷谱分布及结构优化研究

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As a result of long-time service, cracks started to emerge in traction seats of the 6K locomotive. There is an urgent need for more reliable traction seat structures. The stress-time history of key points of traction seats was measured under 6K locomotive operation condition. By methods of mean stress amendment and load identification, the load spectra for six traction seats were compiled. The statistic inference and the fitting test were processed on the load spectra, and the Weibull distribution function and the maximum load were deduced in order to have a more comprehensive understanding of the load distribution. With the help of ANSYS code, the optimization structures of traction seats were designed and the dynamic stress test was carried out. Combined with the S-N curve and Miner Law, the equivalent stress amplitudes of key points relative to service life were calculated. The results show that all of the equivalent stress amplitudes are less than the fatigue limit and the optimization structures meet with the operation requirement.
机译：由于长期服务，在6K机车的牵引座上开始出现裂纹。迫切需要更可靠的牵引座椅结构。在6K机车运行条件下，测量了牵引座椅关键点的应力时间历史。通过平均应力修正和载荷识别的方法，编制了六个牵引座椅的载荷谱。对载荷谱进行统计推断和拟合检验，推导了威布尔分布函数和最大载荷，以便对载荷分布有更全面的了解。借助于ANSYS代码，设计了牵引座椅的优化结构，并进行了动应力测试。结合S-N曲线和Miner定律，计算出关键点相对于使用寿命的等效应力幅值。结果表明，所有等效应力幅均小于疲劳极限，优化结构满足运行要求。

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