基于RecurDyn的多工况下的尼龙蜗轮疲劳性能研究  

Study on Fatigue Performance of Nylon Worm Gear Under Multiple Working Condition based on RecurDyn

作　　者：陈剑飞 杨帆 王树林[1] Chen Jianfei;Yang Fan;Wang Shulin(School of Mechanical Engineering,Jiangsu University,Zhenjiang 212013,China;Zhenjiang Customs,Zhenjiang 212008,China)

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]镇江海关,江苏镇江212008

出　　处：《机械传动》2020年第8期117-123,共7页Journal of Mechanical Transmission

摘　　要：汽车转向系统中尼龙蜗轮的齿根弯曲疲劳失效是其主要失效模式。基于Hertz接触理论和以共旋坐标法为基础的增量有限元法,在多体动力学软件RecurDyn中建立蜗轮蜗杆非线性瞬态动力学模型,并根据试验要求的多工况加载条件,对其进行应力分析和疲劳寿命分析,可以精确地得到尼龙蜗轮齿根处在各加载工况的瞬态应力值,进而研究尼龙蜗轮在相应时间历程下的疲劳寿命。仿真分析结果与试验疲劳寿命对比分析表明,当动力学模型和疲劳损伤模型满足一定准确度要求时,可以利用RecurDyn快速、精确地获取尼龙蜗轮多工况动态加载下的疲劳寿命。该疲劳性能研究方法为后续汽车转向系统中蜗轮蜗杆的设计及疲劳寿命分析提供了模型和理论依据。The main failure mode in automobile steering system is the bending fatigue failure of the tooth root of nylon worm gear,based on Hertz contact theory and incremental finite element method based on corotational coordinate method,the worm and worm gear nonlinear transient dynamics model is built in multibody dynamics software RecurDyn,and according to the test requirements of loading conditions,the stress analysis and fatigue life analysis is carried out in the software,the nylon worm gear tooth root in each loading condition of transient stress value can be accurately got,then the nylon worm gear fatigue life in the corresponding time process is studied.Fatigue life analysis of the simulation analysis and experimental show that when the dynamics model and fatigue damage model meet certain accuracy requirements,the RecurDyn can be used to quickly and accurately obtain the fatigue life under dynamic loading,this fatigue performance research method provides a model and theoretical basis for the design and fatigue life analysis of worm and worm gear in the following automobile steering system.

关 键 词：尼龙蜗轮 多工况 疲劳分析 RECURDYN 

分 类 号：U463.4[机械工程—车辆工程]