OPTIMIZATION OF FATIGUE LIFE OF TRANSMISSION SHAFT BASED ON RESPONSE SURFACE METHOD

LIU LongJie; ZHAO LiHui; SHI ChengMiao; ZHENG SongLin; WENG Shuo; LIU XiangZhen; DAI Lei

doi:10.16579/j.issn.1001.9669.2022.01.029

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OPTIMIZATION OF FATIGUE LIFE OF TRANSMISSION SHAFT BASED ON RESPONSE SURFACE METHOD

更新时间：2022-09-22

- OPTIMIZATION OF FATIGUE LIFE OF TRANSMISSION SHAFT BASED ON RESPONSE SURFACE METHOD
- Journal of Mechanical Strength Vol. 44, Issue 1, Pages: 215-224(2022)
- 作者机构：
  
  1. 上海理工大学机械工程学院
  2. 上海理工大学机械工业汽车底盘机械零部件强度与可靠性评价重点实验室
  3. 一汽解放汽车有限公司商用车开发院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2022.01.029
  CLC：
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LIU LongJie, ZHAO LiHui, SHI ChengMiao, et al. OPTIMIZATION OF FATIGUE LIFE OF TRANSMISSION SHAFT BASED ON RESPONSE SURFACE METHOD. [J]. 44(1):215-224(2022)
DOI：

LIU LongJie, ZHAO LiHui, SHI ChengMiao, et al. OPTIMIZATION OF FATIGUE LIFE OF TRANSMISSION SHAFT BASED ON RESPONSE SURFACE METHOD. [J]. 44(1):215-224(2022) DOI： 10.16579/j.issn.1001.9669.2022.01.029.

摘要

针对传动轴提前发生疲劳失效问题,开展对应力状态及寿命的研究,通过对实测载荷的分析,得出传动轴提前发生疲劳失效的原因是左右两侧花键输出载荷不一致,利用有限元软件建立传动轴有限元模型,得到传动轴右侧齿根处应力最大,是传动轴的薄弱部位。采用响应面法和遗传算法对传动轴的结构参数(齿根圆角、花键过渡圆弧及光轴圆弧槽深)进行优化,优化后的传动轴齿根薄弱部位应力降低了28.3%,传动轴的疲劳寿命提升了五倍,可靠度更高。最后以比例缩小试样进行疲劳试验,试验结果表明传动轴寿命提升到原来的两倍。通过试验验证了优化方法的有效性,方法对之后轴类零部件优化有一定的参考意义。

Abstract

In view of the fatigue failure of the transmission shaft in advance, the study of the stress state and life is carried out. Through the analysis of the actual measured load, the cause of the fatigue failure of the drive shaft in advance is the inconsistent output load of the left and right splines. The finite element model of the transmission shaft is established by using finite element software, and the maximum stress at the root of the right tooth of the transmission shaft is obtained, which is the weak part of the transmission shaft. The response surface method and genetic algorithm are used to optimize the structural parameters of the transmission shaft（tooth root fillet, spline transition arc, and arc groove depth）. After optimization, the stress of the weak part of the transmission shaft tooth root is reduced by 28.3%. The fatigue life of the transmission shaft is increased by five times, and the reliability is higher. Finally, the fatigue test is carried out on the scaled down sample. The test result shows that the life of the drive shaft is doubled. The effectiveness of the optimization method is verified through experiments, and the method has certain reference significance for the optimization of shaft parts in the future.

关键词

传动轴载荷响应面寿命优化

Keywords

Transmission shaftLoadResponse surfaceLife optimization

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