摘要
为了计算考虑支撑结构柔度和材料塑性变形影响的大型重载转盘轴承内部载荷分布和接触应力,将内外圈滚道与滚动体接触等效成单向压缩弹簧,从而建立包括支撑结构在内的轴承整体简化有限元模型。等效弹簧系数由单个滚动体的载荷—弹塑性变形关系曲线确定,而单个滚动体的载荷—弹塑性变形关系应用有限元接触分析法求得。算例分析表明对于具有塑性变形的转盘轴承,接触变形、滚动体载荷分布、内外圈应力、接触应力等赫兹理论计算结果与有限元弹塑性分析法计算结果存在较大差异。因此,对于大型重载转盘轴承不适合采用赫兹理论进行分析计算。
In order to gain the interior load distribution and contact stress of the heavy-duty slewing bearing accounting for the supporting structure flexibility and the plastic deformation of the bearing, the contact between the rolling element and the raceway was equivalent to an unidirectional compression spring, and then the whole simplified finite element model combining the bearing with the supporting structure was built. The spring coefficient was determined by the load verse elastic-plastic deformation relationship of the single rolling element that was obtained by finite element contact method. The difference between the traditional Hertz contact results and the FEM results is very obvious for the slewing bearings with plastic deformation, such as contact deflection of the rolling elements and the raceway, load distribution on the rolling elements, stress in the raceway and contact pressure between the rolling elements and the raceway. Therefore, the method based on the Hertz contact mechanics theory is not applicable for the performance analysis of the heavy-duty slewing bearing.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2011年第12期52-56,F0004,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家"十五"863计划资助项目(2009AA044901)
关键词
轴承
有限元法
载荷
分布
接触分析
bearings
finite element method
loads
distribution contact analysis
