深沟球轴承运转过程动态特性有限元分析

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，ANSYS/LS-DYNA是分析轴承运转过程动力接触问题十分有效的工具。

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

Considering the effect of the radial load and rotational speed of bearing, the finite element model for dynamic contact problem of deep-groove ball bearing was established by the software--ANSYS/LS-DYNA. Based on explicit dynamic finite element method, it adopted fully integrated element algorithm to control the hourglass and set the mass scaling time step size to reduce the 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 inner ring, and obtained the dynamic response of bearing and the stress distribution of the rolling element during the running process. The maximum and the minimum linear speed of the rolling element occurred at the contact point with the inner ring and the outer ring respectively. The dynamic stress between the rolling element and inner ring was basically the same, while the dynamic stress between the rolling element and outer ring increased with the increasing of the rotational speed. The reaction force fluctuation between the rolling element and the outer ring was bigger than that with inner ring, while the force between the rolling element and the cage was relatively small. The Research showed that ANSYS/LS-DYNA software is a very useful tool for analyzing dynamic contact of rolling bearing in motion process.