Dynamic Behavior of a shaft-rolling bearing system with clearance
Dynamic Behavior of a shaft-rolling bearing system with clearance
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发表时间：
2009
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通讯作者：
Gan Hong
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作者：
Gan Hong
研究了由一根轴和两个滚动轴承组成的机械系统的动态特性。首先，以6310型带间隙滚动轴承为研究对象，推导出载荷与位移的关系式，将该问题视为静不定问题，采用Hertz理论进行求解，得到了数值解。针对轴-滚动轴承系统，讨论了两类变载荷动力学问题：一类是将轴作为刚体处理，另一类是将轴作为柔性轴处理。利用动力学仿真专用软件亚当斯进行了求解。得到了滚动轴承间隙存在时，系统在变载荷作用下共振时的幅频关系和动力响应。数值结果表明，轴的柔性和滚动轴承的间隙对系统的性能有明显的影响。该系统是一个非线性系统，间隙越大，其非线性越强。
Dynamic performance of a mechanical system composed of a shaft and two rolling bearings was studied here. First,a rolling bearing 6310 with clearance was studied to obtain the formula between the applying load and the relevant displacement,and the problem was referred to as a static indeterminate problem and Hertz theory was used to solve it. Then,the numerical solution was acquired. Two kinds of dynamic problems with varying loads were discussed for the shaft-rolling bearing system,one was to treat the shaft as a rigid body and the other was to treat it as a flexible shaft. The special software ADAMS for dynamic simulation was used to solve the problems. The relation between amplitude and frequency,dynamic response of the system in resonance were obtained with varying load while the clearance of the rolling bearing existed. Numerical results showed that the flexibility of shaft and the clearance of the rolling bearing obviously affect the behavior of the system. The system was a nonlinear one and the greater the clearance,the stronger its nonlinear property.