新型装载机工作装置疲劳寿命预测

doi:10.3901/JME.2025.17.027

摘要/Abstract

摘要： 为了验证装载机工作装置的可靠性，针对一种装载机反转八连杆的新型工作装置，对其进行静力学分析，求出工作装置中各个铰点的受力。通过Workbench软件对该新型工作装置的动臂、摇臂、顶杆和连杆进行柔性化处理，在ADAMS软件中建立装载机工作装置的刚柔耦合模型，获得了各个工况下动臂的铰接点受力，并与静力学分析结果进行对比，验证了新型装载机刚柔耦合动力学仿真的正确性。求出装载机工作装置中各个构件的危险节点应力-时间历程，采用雨流计数法获取装载机危险节点的应力谱，并利用GoodMan直线方程修正非对称循环应力。最后通过修正后的P-S-N曲线进行疲劳寿命计算。研究表明，该装载机工作装置符合设计要求，并为后续轻量化研究提供了基础。

关键词: 新型装载机工作装置, 动力学仿真, 刚柔耦合模型, 雨流计数, GoodMan直线方程

Abstract: In order to verify the reliability of the loader working device, the static analysis of the new working device was carried out for a new type of working device with eight connecting rods reversed by the loader, and the force of each hinge point in the working device was obtained. The boom, rocker arm, ejector rod and connecting rod of the new working device were flexibly processed by Workbench software, and the rigid-flexible coupling model of the loader working device was established in ADAMS software, and the force at the hinge point of the boom under various working conditions was obtained, and the correctness of the rigid-flexible coupling dynamic simulation of the new loader was verified by comparing it with the static analysis results. The stress-time history of the dangerous nodes of each component in the loader working device is obtained. The stress spectrum of the dangerous nodes of the loader was obtained using the rainflow counting method, and the GoodMan linear equation was used to correct the asymmetric cyclic stress. Finally, the fatigue life is calculated by the modified P-S-N curve. The results show that the new loader working device meets the design requirements and lays a foundation for the lightweight research of the working device.

Key words: new loader working device, dynamic simulation, rigid-flexible coupling model, rainflow counting, GoodMan linear equations

中图分类号:

TH243

黄鹏, 路景深, 丁华锋, 陈子明, 赵玉倩. 新型装载机工作装置疲劳寿命预测[J]. 机械工程学报, 2025, 61(17): 27-40.

HUANG Peng, LU Jingshen, DING Huafeng, CHEN Ziming, ZHAO Yuqian. Fatigue Life Prediction of a New Loader Working Device[J]. Journal of Mechanical Engineering, 2025, 61(17): 27-40.

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