基于载荷谱的装载机驱动桥轮边减速器齿轮接触疲劳寿命分析

CONTACT FATIGUE LIFE ANALYSIS OF WHEEL EDGE REDUCER GEAR OF DRIVE AXLE OF LOADER BASED ON LOAD SPECTRUM

针对装载机在服役期间驱动桥轮边减速器齿轮的接触疲劳问题,对其进行了疲劳寿命评估。在Hypermesh中建立了轮边减速器太阳轮与行星轮的有限元模型,依据疲劳加载载荷谱在Ansys Workbench中对其进行静力学与瞬态动力学求解。基于静力学与瞬态动力学在Ncode环境中进行了疲劳寿命计算,将基于有限元的疲劳寿命计算结果与台架实验结果进行对比。结果表明,在各级载荷下,瞬态动力学计算出的接触应力均大于静力学的计算结果。基于瞬态动力学的疲劳寿命为47417 h,与实验结果更为接近,与两次台架实验结果的相对误差分别为9.32%和15.14%。分析结果对装载机驱动桥齿轮系统的优化与其疲劳寿命评估提供了参考和依据。

In view of the contact fatigue problem of the wheel side reducer gear of the drive axle of the loader during its service,the fatigue life was evaluated.Finite element models of the sun wheel and the planet wheel were established in Hypermesh.Statics and transient dynamics were solved in Ansys Workbench according to the fatigue loading spectrum.The fatigue life was calculated in Ncode environment based on statics and transient dynamics.The fatigue life calculated based on finite element was compared with the bench test results.The results show that the contact stress calculated by transient dynamics is greater than that calculated by static.The fatigue life based on transient dynamics is 47417 h,which is closer to the experimental results,and the relative errors are 9.32%and 15.14%.The analysis results provide reference and basis for the optimization and fatigue life evaluation of the drive axle gear system of loader.