Fatigue life analysis and prediction of planetary gear bearings in electromechanical composite transmission systems

GAI Jiangtao; LI Shujun; ZHANG Qiang

doi:DOI：10.16579/j.issn.1001.9669.2025.09.011

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Fatigue life analysis and prediction of planetary gear bearings in electromechanical composite transmission systems

更新时间：2025-09-22

- Fatigue life analysis and prediction of planetary gear bearings in electromechanical composite transmission systems
- Journal of Mechanical Strength Vol. 47, Issue 9, Pages: 122-129(2025)
- 作者机构：
  
  1.中国北方车辆研究所先进越野系统技术全国重点实验室，北京 100072
  2.中国人民解放军32381部队，北京 100072
- 作者简介：
  
  GAI Jiangtao, E-mail: jiangtaogai@163.com
- 基金信息：
  
  National Natural Science Foundation of China(51230512);Foundation:Vehicle Propulsion Special Project of SASTIND
- DOI：DOI：10.16579/j.issn.1001.9669.2025.09.011
  CLC：
- Received：09 July 2025，
  
  Published：15 September 2025
- 稿件说明：
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盖江涛，李淑君，张强. 机电复合传动系统行星轮轴承疲劳寿命分析与预测［J］. 机械强度，2025，47（9）：122-129.

GAI Jiangtao，LI Shujun，ZHANG Qiang. Fatigue life analysis and prediction of planetary gear bearings in electromechanical composite transmission systems［J］. Journal of Mechanical Strength，2025，47（9）：122-129.
盖江涛，李淑君，张强. 机电复合传动系统行星轮轴承疲劳寿命分析与预测［J］. 机械强度，2025，47（9）：122-129. DOI： DOI：10.16579/j.issn.1001.9669.2025.09.011.

GAI Jiangtao，LI Shujun，ZHANG Qiang. Fatigue life analysis and prediction of planetary gear bearings in electromechanical composite transmission systems［J］. Journal of Mechanical Strength，2025，47（9）：122-129. DOI： DOI：10.16579/j.issn.1001.9669.2025.09.011.

摘要

针对高速履带车辆机电复合传动系统内部载荷演化规律不明、行星轮轴承疲劳寿命预测方法缺乏的问题，建立机电复合传动系统行星轮轴承动力学模型，获取行星轮轴承接触载荷分布规律，提出了基于行星轮轴承动载特性的疲劳寿命预测方法，为机电复合传动系统行星机构的优化和设计提供一定的指导作用。考虑机电复合传动系统多排耦合效应、齿轮时变啮合刚度激励以及行星轮轴承非线性支撑刚度激励影响，采用Simpack软件建立了机电复合传动系统动力学模型，获得了行星轮轴承承载情况，进一步采用集中质量法建立行星轮轴承动力学模型，分析行星轮轴承接触载荷演化规律，进而采用Lundberg-Palmygren（L-P）公式建立了行星轮轴承疲劳寿命分析与预测模型，分析了不同工况下行星轮圆柱滚子轴承疲劳寿命变化规律。结果表明，在高转速时，行星轮轴承公转离心力对行星轮轴承接触载荷和疲劳寿命有显著影响；在转速较低时，减速排行星轮轴承寿命随着转速的增加而增大；在转速较高时，减速排行星轮轴承寿命随着转速的增加而减小；在高转速时，根据机电复合传动系统寿命要求，可采取行星轮轴承滚动体修形等措施延寿。

Abstract

To address the problems of unclear internal load evolution law of the electromechanical composite transmission system for high-speed tracked vehicles and the lack of fatigue life prediction method for planetary gear bearings

a dynamic model of planetary gear bearings in the electromechanical composite transmission system was established to obtain the distribution law of contact loads on planetary gear bearings. A fatigue life prediction method based on the dynamic load characteristics of planetary gear bearings was proposed

which provides certain guiding significance for the optimization and design of the planetary mechanism in the electromechanical composite transmission system. Considering the effects of multi-row coupling effect of the electromechanical composite transmission system

gear time-varying meshing stiffness excitation

and nonlinear support stiffness excitation of planetary gear bearings

a dynamic model of the electromechanical composite transmission system was established using Simpack to obtain the load-bearing conditions of planetary gear bearings. Furthermore

a dynamic model of planetary gear bearings was established using the lumped mass method to analyze the evolution law of contact loads on planetary gear bearings. Then

a fatigue life analysis and prediction model for planetary gear bearings was established using the L-P formula to analyze the variation law of fatigue life of cylindrical roller bearings for planetary gears under different working conditions. The results show that at high rotational speeds

the centrifugal force of the planetary gear bearings during revolution has a significant impact on the contact loads and fatigue life of the planetary gear bearings. At lower rotational speeds

the service life of the planetary gear bearings in the reduction gear increases with the rotational speed. At higher rotational speeds

the service life of the planetary gear bearings in the reduction gear decreases with the increase in rotational speed. At high rotational speeds

measures such as profile modification of the rolling elements of planetary gear bearings can be taken to extend the service life according to the life requirements of the electromechanical composite transmission system.

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references

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