圆柱滚子轴承多体接触动力学研究

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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。

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	姚廷强黄亚宇王立华

关键词 ：接触动力学, 圆柱滚子轴承, 多体系统动力学, 保持架

Abstract：Considering the dynamic contact relationship between rollers, rings and cage, a new method is brought out for multibody dynamics analysis and dynamic design of cylindrical roller bearings in mechanical systems. Based on the triangle mesh models of ring races, the searching algorithm for prediction of dynamic contact force is carried out. The three dimensional multibody contact dynamics model of cylindrical roller bearing is constructed with lubrication friction and Hertz contact .The dynamic characteristics and stability of cage are calculated by generalized-α algorithms under different conditions. The results of trajectory of motion, angular velocity, tilt and torsional vibration of rollers, dynamic contact-impact force, drag force and phase diagram are achieved. Under low speed or small radial force, the motion of cylindrical roller bearing is unstable. The drag force is relative small and unstable, there’re the frequently contact-impact between rollers, cage and rings, the vibration displacements of inner’s center are relative large, the radial plane motion of cage is unstable and approximate circular motion. The angular speed or rotate radial force is increasing gradually, the radial plane motion of cage is stable circular motion and single periodic phase motion, the axial vibration of cage is obvious and the tilt and torsional vibration of rollers are relative small.

Key words： Contact dynamics cylindrical roller bearing multibody system dynamics cage

收稿日期: 2013-12-11 出版日期: 2015-04-15

引用本文:

姚廷强黄亚宇王立华. 圆柱滚子轴承多体接触动力学研究[J]. 振动与冲击, 2015, 34(7): 15-23.
YAO Tingqiang HUANG Yayu WANG Lihua. Multibody Contact Dynamics Research on Cylindrical Roller Bearing. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(7): 15-23.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I7/15

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