In this paper, the molecular gas lubrication model was used to analyze the nonlinear dynamic behavior of two-lobe non-circular gas-lubricated micro-bearings. The effects of temperature rise are taken into account. At high temperatures, in addition to gas rarefaction, its viscosity and friction will also change, and slip across boundaries will occur. The rarefaction of the lubricating gas film caused by the microscale effect at high temperatures was considered. The effects of temperature and rotation speed (with and without rarefaction effect) on the dynamic behavior of the non-circular micro gas bearing were studied. The nonlinear equation governing the gas behavior is discretized using the finite-element method and then solved simultaneously with the dynamic equations of rotor motion using the fourth-order Runge–Kutta method. Center orbit diagrams, phase portraits, Poincare maps, power spectrum, and bifurcation diagrams are used to investigate the dynamic behavior of two-lobe non-circular gas-lubricated micro-bearings. Some results show that with increasing temperature, the rotor behavior changes from T-periodic to quasi-periodic. It was also observed that at high temperatures, with increasing rotational speed, the behavior of the system changes from T-periodic to quasi-periodic, but if the gas is rarefied, this change occurs at a slower speed.

本文利用分子气体润滑模型对两瓣非圆形气体润滑微轴承的非线性动力学行为进行了分析。考虑了温度上升的影响。在高温下，除了稀有气体外，它的粘度和摩擦力也会发生变化，并且会越过边界滑动。考虑了由高温下的微尺度效应引起的润滑气体膜的稀疏性。研究了温度和转速（有或没有稀疏效应）对非圆形微型气体轴承动态行为的影响。使用有限元方法离散化控制气体行为的非线性方程，然后使用四阶Runge-Kutta方法与转子运动的动力学方程同时求解。中心轨道图，相图，庞加莱图，功率谱和分叉图用于研究双瓣非圆形气体润滑微轴承的动力学行为。一些结果表明，随着温度的升高，转子的行为从T周期变为准周期。还观察到，在高温下，随着转速的增加，系统的行为从T周期变为准周期，但是如果气体稀少，则这种变化会以较慢的速度发生。