摘要
基于动态接触力学和显式动力学有限元算法,采用三维实体单元建立参数化的深沟球轴承三维有限元模型.利用有限元软件LS-DYNA和自适应网格技术对深沟球轴承的工作运动过程进行了数值模拟,得出了轴承内外圈、滚珠、保持架之间的接触应力、应变的变化情况及接触过程中的压力分布情况.并将计算结果与赫兹理论计算结果进行比较,验证了动态有限元仿真的合理性.在此基础上,综合考虑了轴承原始制造误差、转速、载荷等不同工况对轴承动态性能的影响,为轴承的疲劳强度计算和动态优化设计提供了可靠的理论依据.
A 3-D parameterized finite element model was developed introducing physical elements for the rolling bearings with deep ball filling slots, based on the dynamic contact and explicit dynamics. With the finite element software ANSYS/LS-DYNA and adaptive grid method, a numerical simulation was done for the whole operating process of those bearings, thus revealing the change in contacting stress strain between the inner/outer ring, rolling balls and ball retainer and relevant pressure in distribution. The result showed that the dynamic simulation is reasonable in comparison with the calculation result by Hertz＇ s theory. Then, the effects of the bearing initial error arising from manufacture, rotating speed and load on the dynamic performance of those bearings are raken into account to provide theoretically reliable reference to the calculation of fatigue strength and optimum dynamic design of those bearings.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第11期1625-1628,共4页
Journal of Northeastern University(Natural Science)
基金
国家高技术研究发展计划项目(2006AA04Z408)
关键词
球轴承
动态接触算法
显式动力有限元
接触应力
赫兹接触
ball bearing
dynamic contact algorithm
explicit dynamic finite element
contact stress
Hertz＇s contact
