Rigid-flexible Coupling Dynamics and Fatigue Life Evaluation of Wheel Reducers Based on the Load Spectrum

Yang Siyuan; Wan Yipin; Zhang Lei; Song Xuding

doi:10.16578/j.issn.1004.2539.2023.04.001

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Rigid-flexible Coupling Dynamics and Fatigue Life Evaluation of Wheel Reducers Based on the Load Spectrum

Theory·Research | 更新时间：2023-05-04

- Rigid-flexible Coupling Dynamics and Fatigue Life Evaluation of Wheel Reducers Based on the Load Spectrum
- Journal of Mechanical Transmission Vol. 47, Issue 4, Pages: 1-7(2023)
- 作者机构：
  
  长安大学道路施工技术与装备教育部重点实验室，陕西西安 710064
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2023.04.001
  CLC：
- Published：15 April 2023，
  
  Received：16 March 2022，
  
  Revised：18 July 2022，
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杨思源,万一品,张雷等.基于载荷谱工况的轮边减速器刚柔耦合动力学与疲劳寿命评估[J].机械传动,2023,47(04):1-7.

Yang Siyuan,Wan Yipin,Zhang Lei,et al.Rigid-flexible Coupling Dynamics and Fatigue Life Evaluation of Wheel Reducers Based on the Load Spectrum[J].Journal of Mechanical Transmission,2023,47(04):1-7.
杨思源,万一品,张雷等.基于载荷谱工况的轮边减速器刚柔耦合动力学与疲劳寿命评估[J].机械传动,2023,47(04):1-7. DOI： 10.16578/j.issn.1004.2539.2023.04.001.

Yang Siyuan,Wan Yipin,Zhang Lei,et al.Rigid-flexible Coupling Dynamics and Fatigue Life Evaluation of Wheel Reducers Based on the Load Spectrum[J].Journal of Mechanical Transmission,2023,47(04):1-7. DOI： 10.16578/j.issn.1004.2539.2023.04.001.

摘要

针对装载机驱动桥轮边减速器齿轮系统的疲劳问题，开展了其动力学仿真与疲劳寿命评估。首先，基于刚体动力学与刚柔耦合动力学，分析了太阳轮与行星轮接触力的变化情况，并与接触力理论计算值对比，验证了模型的可信性；而后，将太阳轮考虑为柔性体，提取了齿根疲劳危险点的应力时间历程，对应力时间历程进行了峰谷抽取与小波去除，结合Goodman公式修正了平均应力的影响，编制了一维应力谱；最后，依据线性疲劳损伤累积准则对太阳轮齿根的裂纹萌生寿命进行了计算评估，并与实验结果进行了对比。结果表明，基于刚柔耦合动力学模型的太阳轮的裂纹萌生寿命为42 709 h，与两次实验结果的相对误差分别为1.5%与3.7%，验证了评估方法的合理性，为齿轮系统的优化与抗疲劳设计提供了参考。

Abstract

Aiming at the fatigue problem of the wheel edge reducer gear system of the drive axle of the loader

the dynamics simulation and fatigue life evaluation are carried out. Firstly

based on rigid-body dynamics and rigid-flexible coupling dynamics

the variation of the contact force between the solar wheel and the planetary wheel is analyzed

and compared with the theoretical calculation value of the contact force

the credibility of the model is verified. Then

the sun wheel is considered as a flexible body

and the stress-time history of the tooth root fatigue risk point is extracted. The peak-valley extraction and wavelet removal are carried out for the stress-time history. The influence of average stress is corrected by Goodman formula

and a one-dimensional stress spectrum is prepared. Finally

the crack initiation life of the tooth root is calculated and evaluated according to the linear fatigue damage accumulation criterion and compared with the experimental results. The results show that the crack initiation life of the solar wheel based on the rigid-flexible coupling dynamic model is 42 709 h

and the relative errors of the two experimental results are 1.5% and 3.7% respectively. The rationality of the evaluation method is verified

which provides a reference for the optimization and anti-fatigue design of the gear system.

关键词

载荷谱动力学刚柔耦合疲劳寿命

Keywords

Load spectrumDynamicsRigid-flexible couplingFatigue life

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