基于有限元的谐波齿轮传动柔性轴承动态和接触特性分析

Dynamic and Contact Characteristic Analysis of Flexible Bearing of Harmonic Gear Drive based on Finite Element

针对柔性轴承对谐波传动的承载能力、传动精度及寿命影响较大等问题,以谐波传动柔性轴承为研究对象,综合考虑轴承转速、载荷、变形等因素影响,基于ANSYS/LS-DYNA非线性接触分析方法对柔性轴承的动态和接触特性进行有限元仿真分析。研究结果表明,柔性轴承外圈不同位置动态特性基本相同,距离长轴不同距离的滚动体位移基本相同,速度以波峰波谷交替变化,且随距离增大而减小;外圈、滚动体应力主要集中在长轴附近,应力以波峰波谷交替变化,远离长轴后应力值减小;滚动体与内外圈接触力波动较大,且与外部载荷基本相同,与保持架接触力波动较小。

To the problems of flexible bearing has an important effect on the carrying capacity,transmission accuracy and life of the harmonic gear drive,a flexible bearing is regarded as the research object,the dynamic and contact characteristics of flexible bearing are analyzed based on ANSYS/LSDYNA nonlinear contact analysis method for comprehensive consideration of the factors such as bearing rotating speed,load and deformation and so on.The results show that the dynamic characteristics of flexible bearing outer ring in different positions are basically the same,the moved distance of rolling in long axis different distance is basic same,the velocity wave troughs alternating changes and the velocity decreases with increasing distance.The outer ring,rolling body stress concentrated near the long axis,stress wave troughs alternating changes,the stress value decreases away from the long axis;the rolling element and contact force on inner and outer is volatile,and basically the same with external load,and the keep contact force size is less volatile.