机械弹性车轮疲劳寿命及其影响因素研究  

Fatigue life and influencing factors of a mechanical elastic wheel

作　　者：张明杰[1] 赵又群[1] 杜现斌[1] 王强[1] 肖振[1] 

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《哈尔滨工程大学学报》2016年第11期1560-1564,共5页Journal of Harbin Engineering University

基　　金：总装探索研究项目(NHA13002);江苏省普通高校研究生科研创新计划项目(KYLX_0241)

摘　　要：为提高机械弹性车轮的可靠性和耐久性，对其疲劳寿命进行了研究。结合机械弹性车轮的结构及承载方式，建立了疲劳试验的有限元模型；采用幅值、频率相同的正弦载荷和余弦载荷模拟车轮骨架载荷循环过程；基于Miner线性疲劳累积损伤理论进行疲劳寿命预测。分析表明：车轮骨架的疲劳破坏主要集中在弹性环组合卡与铰链组的连接部位，最小疲劳寿命为4．03×10^5次；随着铰链组个数、铰链组横截面积的增加，疲劳寿命呈非线性增加；随着实际负荷的增加，疲劳寿命呈下降趋势。In this paper, the fatigue life of a mechanical elastic wheel is studied to improve its reliability and durability . The finite element model of the fatigue tests is established by combining the structure and the loading mode of a mechanical elastic wheel. Sine and cosine loads with the same amplitude and frequency are applied to simulate a load cycle process of the wheel skeleton. The fatigue life is predicted on the basis of Miner linear fatigue cumulative damage theory. The analysis results show that the fatigue failures of the wheel skeleton is mainly centered on the connection of the flexible ring composite clip and hinge group. The minimum fatigue life is 4.03 ×10^5 times. The fatigue life nonlinearly increases as the number and cross-section area of the hinge group increase. The fatigue life decreases as the actual load increases.

关 键 词：机械弹性车轮 疲劳试验 有限元模型 应力分析 Miner损伤理论 疲劳寿命 

分 类 号：U463.3[机械工程—车辆工程]