深沟球轴承动力学有限元仿真分析  

Dynamics Analysis of Deep Groove Ball Bearing by FEM

作　　者：产文兵[1] 姚廷强[1] 谢伟[1] 谭阳[1] 

机构地区：[1]昆明理工大学机电工程学院,云南昆明650093

出　　处：《昆明理工大学学报（自然科学版）》2013年第5期45-51,共7页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学研究基金(11002062);昆明理工大学引进人才启动基金资助项目(KKSA201101018)

摘　　要：考虑了钢球、套圈滚道和保持架的结构柔性变形和动态接触关系,在ANSYS/LS-DYNA中建立了深沟球轴承的柔性多体接触动力学模型,仿真分析了深沟球轴承的动力学特性,保持架的角速度和动态接触冲击应力的变化规律.将球轴承的保持架角速度、钢球公转和自转角速度等的仿真计算结果与理论计算值进行了对比验证,同时运用球轴承的振动固有频率的试验值验证了仿真结果.仿真结果表明,由于保持架和钢球的接触碰撞和打滑,在球轴承启动阶段,较大的加速度变化引起保持架较大的动态接触冲击应力,降低保持架的疲劳寿命,容易引起断裂失效.计算结果为球轴承动态设计和疲劳寿命提供了参考方法.With consideration of the dynamic contact relationship and structural deformation of balls, raceways and cage, the FEM dynamics model of deep groove ball bearing is established by ANSYS/LS-DYNA. Through simulation, the analysis is carried out on the law of the deep groove ball bearings dynamic characteristics and the regularity with the angular speed of cage as well as on the dynamic contact impact stress. The calculated angular velocity of rotation of ball and cage are then verified by theoretical value. The frequencies of acceleration vibra- tion are verified by test value. Due to the contact and sliding between cage and balls as well as the larger acceler- ation variety may reduce ing dynamic , the dynamic contact stress is larger in the start phase of ball bearings. The large dynamic stress the fatigue life, or cause the fracture failure of cage. The calculated results have significance in guid- design and fatigue life analysis of ball bearings.

关 键 词：柔性保持架 深沟球轴 ANSYS LS—DYNA 动力学分析 

分 类 号：TH113.2[机械工程—机械设计及理论]