狭缝节流空气轴承-转子系统稳定性分析

为研究狭缝节流空气静压轴承-转子系统在阶跃载荷作用下的稳定性，结合流体力学和转子动力学方程，利用动网格技术，充分考虑转子在流场作用下的非线性运动，建立轴承-转子动态耦合计算模型。利用流固耦合方法得到系统在瞬态和稳态下的轴心轨迹和流场分布。通过分析计算得到载荷作用下系统的轴心轨迹和轴承内部流场分布云图，并引入时域参数对系统的稳定性进行分析。通过改变空气轴承结构参数，研究特定转速下不同轴承参数对系统瞬态响应阶段快速性和稳定性的影响规律。结果表明：通过控制轴承的狭缝间距、深度和宽度等参数，能够改善系统的动态稳定性。

Stability Analysis of Slit Throttle Air Bearing-Rotor System

In order to study the stability of the slit throttle air bearing-rotor system under step load,combining the hydrodynamic with rotor dynamics equations,fully comsidering the nonlinear motion of the rotor under the action of the flow field,the dynamic mesh technique was used to establish the bearing-rotor dynamic coupling calculation model.The fluid-solid coupling method was used to obtain the axial trajectory and the flow field distribution in transient and steady state.The axial trajectory and the distribution of the flow field inside the bearing were obtained through the analysis and calculation,and the stability of the system was analyzed by introducing the time domain parameters.By changing the structural parameters of the air bearing,the influence of different bearing parameters on the rapidity and stability of the system in the transient phase at a specific speed were studied.The results show that the dynamic stability of the system can be improved by controlling the slit spacing,depth and width of the bearings.