深沟球轴承运转过程动态特性有限元分析  

Finite element analysis for dynamic charactreistic of a deep-groove ball bearing in motion process

作　　者：林腾蛟[1] 荣崎[1] 李润方[1] 邵毅敏[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044

出　　处：《振动与冲击》2009年第1期118-122,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(编号:50675232;50735008);长江学者和创新团队发展计划资助项目(编号:IRT0763)

摘　　要：综合考虑轴承径向载荷及转速的影响,应用ANSYS/LS-DYNA软件建立了深沟球轴承多体动力接触有限元模型;以显式动力学有限元法为基础,采用全积分单元算法控制沙漏,设置质量缩放系数缩减计算时间,对内圈施加不同转速时的深沟球轴承进行动力接触分析,得出了深沟球轴承运转过程的动态响应及滚动体的应力分布。滚动体的最大和最小线速度分别出现在与内、外圈接触点上,各转速下滚动体与内圈接触的应力基本相同,滚动体与外圈接触的应力随转速增高而相应增大,滚动体与外圈间接触力的波动大于内圈,而滚动体与保持架间的作用力较小。研究表明,AN-SYS/LS-DYNA是分析轴承运转过程动力接触问题十分有效的工具。Considering effect of radial load and rotational speed of bearing,a finite element model for dynamic contact problem of a deep-groove ball bearing was established by the software-ANSYS/LS-DYNA.Based on explicit dynamic finite element method,a fully integration element algorithm was adopted to control hourglass and set mass scaling time step size to reduce calculating time.A dynamic contact analysis of the deep-groove ball bearing was made with the same radial load and different rotational speeds imposed on its inner ring,and the dynamic response of the bearing and the stress distribution of the rolling element during running process were obtained.The maximum and the minimum line speed of the rolling element occurred at the contact points with the inner ring or the outer ring respectively.The dynamic stresses between the rolling element and the inner ring were basically the same,while the dynamic stresses between the rolling element and the outer ring raised with increase in the rotational speed.The contacting force fluctuation between the rolling element and the outer ring was bigger than that between the former and the inner ring,while the force between the rolling element and the cage was relatively smaller.The study showed that ANSYS/LS-DYNA software is a very useful tool for analyzing dynamic contact problems of rolling bearings in motion process.

关 键 词：球轴承 动力接触 显式算法 有限元分析 

分 类 号：TH113.1[机械工程—机械设计及理论]