Study on Thermal Coupling Durability of Mechanical Elastic Wheels under Random Loads

doi:10.3969/j.issn.1004-132X.2021.14.005

Abstract

Abstract: In order to predict the maximum driving range of mechanical elastic wheels under random loads caused by uneven road surfaces under straight driving conditions, the durability of mechanical elastic wheels was studied. A finite element model for durability research was established based on structure characteristics of the wheels. Considering uneven roads, the relationships of speeds, dynamic loads and dynamic load coefficients of the wheels were determined, and the equivalent cyclic loads were applied to the wheels. Based on fatigue damage theory and fatigue test methods, the FE-safe software was used to predict the durability of wheels, and the maximum driving range is as 8787 km. The thermal coupling durability of the clasps was analyzed, and the minimum life position is the middle pin ear, and the maximum driving range is as 5258 km.

Key words: mechanical elastic wheel, durability, thermal coupling, random load

摘要： 为了预测机械弹性车轮在直线行驶工况且承受路面不平导致的随机载荷的条件下所能达到的最大行驶里程，对机械弹性车轮耐久性进行了研究。结合车轮的结构特性，建立了用于耐久性研究的有限元模型。考虑路面不平度，确定车速与车轮动载荷、动载系数的关系，并以等效循环载荷加载至车轮。基于疲劳损伤理论和疲劳试验方法，利用Fe-safe软件对车轮的耐久性进行预测，得出最大行驶里程为8787 km。再对卡环进行热力耦合耐久性分析，发现最小寿命位置为中间销耳处，最大行驶里程为5258 km。

关键词: 机械弹性车轮, 耐久性, 热力耦合, 随机载荷

CLC Number:

U463.34

ZHANG Chen, ZHAO Youqun, ZHENG Xin, DU Yiyan. Study on Thermal Coupling Durability of Mechanical Elastic Wheels under Random Loads[J]. China Mechanical Engineering, 2021, 32(14): 1669-1676.

张晨, 赵又群, 郑鑫, 杜宜燕. 随机载荷下机械弹性车轮的热力耦合耐久性研究[J]. 中国机械工程, 2021, 32(14): 1669-1676.

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