基于弹塑性有限元法的拖拉机车轮疲劳寿命预测研究  

Research on forecast of tractor wheels'fatigue life based on Elasto-plastic FEM analysis

作　　者：王大勇 秦东晨[1] 

机构地区：[1]郑州大学机械工程学院,郑州市450001 [2]开封千里车轮有限公司,河南开封475500

出　　处：《中国农机化学报》2017年第10期97-101,110,共6页Journal of Chinese Agricultural Mechanization

摘　　要：基于ANSYS有限元软件,以侧向负载疲劳试验和扭转疲劳试验为依据,通过W15Lx34型可调偏距式拖拉机车轮结构分析,阐明拖拉机车轮弹塑性有限元分析与局部应力应变法预测寿命的过程方法。研究表明,车轮安装偏距对疲劳寿命有负相关性,疲劳寿命随偏距增大而缩短。在常用偏距下,示例车轮疲劳寿命安全系数偏低。给出两种改进方案,并且综合四种偏距按疲劳积累理论计算疲劳寿命,结果显示:两种改进方案的常用偏距和综合偏距疲劳寿命有明显提升。Using ANSYS finite element software analyzed the wheels＇ structure with W15Lx34 adjustable-offset tractor, though the basis of lateral load fatigue test and torsion fatigue test. This paper expounded the analytical method of Elasto-plastic FEM and local stress-strain for tractor wheel. The results indicated that the wheels＇ offset showed a negative correlation with the fatigue life, the fa- tigue life decreased along with the increase of wheel＇s offset, the fatigue life safety factor was insufficient in common offset state, and then two improvement schemes were provided. And using the fatigue accumulation theory calculated the fatigue life with four offset distances. This paper predicted fatigue life for the wheel in consideration of four offset, the results showed that both of the fatigue life obviously increased for the common offset and the comprehensive offset states.

关 键 词：拖拉机车轮 弹塑性有限元法 疲劳试验 局部应力应变法 

分 类 号：TH12[机械工程—机械设计及理论] TP391.77[自动化与计算机技术—计算机应用技术]