摘要
考虑滚子和套圈、滚子和保持架、保持架和引导套圈的动态接触关系,提出了机械系统中圆柱滚子轴承多体动力学分析的新方法。基于圆柱套圈滚道的三角网格模型,实现了圆柱滚子和套圈滚道的动态接触力的预测搜索算法,进而建立了计及润滑摩擦作用和Hertz接触作用的圆柱滚子轴承的三维多体接触全动力学模型。运用广义-α方法计算分析了不同工况条件下圆柱滚子轴承的动态特性和保持架的稳定性,获得了不同工况下轴承的运动轨迹、角速度、滚子和倾斜扭转振动、动态接触力,拖动力和相轨迹等动态响应的变化规律。计算结果表明低速或较小径向力下,滚子和保持架的拖动力相对较小且不稳定,滚子和保持架侧梁、外圈挡边之间存在明显的频繁接触冲击作用,内圈中心的振动位移相对较大,保持架中心的径向平面运动轨迹形成不稳定的近似圆周运动,圆柱滚子轴承的运动稳定性相对较差。随着转速或旋转径向力的增加,保持架中心的径向平面运动轨迹为圆周运动和单周期的相轨迹运动,保持架中心的轴向振动明显,滚子倾斜扭转振动相对较小。
Considering the dynamic contact relationship between rollers, rings and cage, a new method was brought out for muhibody dynamics analysis and dynamic design of cylindrical roller bearings in mechanical systems. Based on triangular mesh models of ring races, a searching algorithm for prediction of dynamic contact force was introduced. A three dimensional muhibody contact dynamics model of cylindrical roller beating was constructed in consideration of lubrication friction and Hertz contact. The dynamic characteristics and algorithms under different conditions. The results of trajectory rollers, dynamic contact-impact force, drag force and phase stability of cage were calculated by using generalized-a of motion, angular velocity, tilt and torsional vibration of diagram were presented. Under low speed or small radial force, the motion of cylindrical roller bearing is unstable. The drag force is relatively small and unstable, there＇ re frequent contact-impact between rollers, cage and rings, the vibration displacement of inner＇ s center is relatively large, the radial plane motion of cage is unstable and in approximate circular form. With the gradual increase of the angular speed or rotating radial force the radial plane motion of cage becomes a motion with stable circle and single period phase locus, the axial vibration of cage is obvious and the tilt and torsional vibration of rollers are relatively small.
出处
《振动与冲击》
EI
CSCD
北大核心
2015年第7期15-23,32,共10页
Journal of Vibration and Shock
基金
国家自然科学基金项目(11002062
11462008)
云南省应用基础研究基金项目(KKSA201101018)
作者简介
姚廷强男，博士，副教授，硕士生导师，1979年生
通信作者黄亚宇男，教授，硕士生导师，1962年生
