薄壁四点接触球轴承接触问题有限元分析

THIN-WALLED FOUR-POINT CONTACT BALL BEARING CONTACT FINITE ELEMENT ANALYSIS

基于Ansys有限元软件,提出薄壁四点接触球轴承的逐级梯度细化接触区域的单元网格划分方法。建立等截面薄壁四点接触球轴承1/2单个滚动体与套圈及整个轴承有限元模型。计算分析了网格单元尺寸对四点接触球轴承接触特性的计算精度影响,求解整个轴承有限元模型在静径向力下的载荷分布规律,获得了薄壁四点接触球轴承较为精确的椭圆接触区域形状和四点接触状态。研究表明:对于接触特性计算,网格划分单元尺寸近似于接触椭圆短半轴的50%时便可以得到较精确计算结果,对于薄壁四点接触球轴承,钢球与内、外圈滚道的接触应力、等效应力和接触变形与径向载荷呈非线性递增关系,接触应力大小和载荷分布的计算结果与赫兹接触理论计算值具有较好的一致性。计算结果较为精确的模拟了薄壁四点接触球轴承的接触特性和载荷分布规律。

Based on the ANSYS finite element software,the method of dividing the contact area of the four point contact ball bearing is proposed. Establish a uniform thin four point contact ball bearing 1/2 single rolling and ring and the bearing finite element model. Calculation and analysis of the grid cell size on contact characteristics of four point contact ball bearing accuracy influence and solve the bearing finite element model in the static radial force load distribution rules and obtained the thin-walled four point contact ball bearing,the more precise the elliptic contact area shape and four point connected contact state. Research shows that： for the calculation of the contact characteristics and the size of mesh generation approximate to 50 percent of the semi minor axis of the contact ellipse can get more precise results,for thin walled four point contact ball bearings,ball and the inner and outer rolling contact should force,the equivalent force and contact deformation and radial load is nonlinear ascending relationship,contact force and load distribution of the calculated results with the Hertz contact theory should be calculated values are in good agreement. The calculation results are more accurate to simulate the contact characteristics and load distribution of the thin wall four point contact ball bearing.