【摘要】 本文提出了一种以粘弹性材料作轴瓦,从而提高轴承稳定性和减振性的新设想,相应地在理论上构成了滑动轴承小扰动粘弹性流体动力润滑问理。联立求解了在微小简谐扰动下的复数形式的粘弹性变形方程和流体动力润滑方程,在变形计算中利用缩减的柔度矩阵求解三维弹性变形。用超松驰迭代法求解润滑方程和扰动润滑方程,解扰动压力的复振幅分布得油膜-支承面在一定扰动频率下的复合动力特性,经迭代使界限涡动频率与扰动频率达成一致,由此求出稳定性基本参数。此外亦计算了同步涡动下的动特性作为确定油膜减振性的依据,由此获得了共振图谱。结果表明,当用粘弹性材料轴承支撑转子系统时,可使其稳定性和减振性明显提高,这种理论上预示了一条构成轴承优异动力特性的新途径。更多还原

【Abstract】 This paper puts forward a new idea of improving bearing stability and buf- fering with the bush made of visco-elastic material,and correspondingly forms perturbation visco-elastic hydrodynamic lubrication theory for slidingbearing. Results show that when rotor system is supported by visco-elastic material bea- rings,its stability and buffering are obviously improved,and thetheorypredi- cts a new way to form excellent dynamic characteristic of bearings.更多还原