分析了流体动压滑动轴承支承转子系统的稳定性和分岔。建立了流体动压滑动轴承-具有陀螺效应的刚性转子系统的运动方程,采用Hori轴承模型求解非线性油膜力及其Jacobian矩阵,将Poincar映射和Newton-Raphson方法相结合求解系统的周期响应,结合Floquet稳定性分岔理论分析系统周期响应的稳定性和分岔形式。将转速作为分岔参数发现,随着转速的继续增加,系统基本呈现准周期运动,但在某些孤立狭窄的转速范围内系统出现了模态锁定现象,随着转速的进一步增加,系统发生混沌运动。
Stability and bifurcation of hydrodynamic sliding bearing-rotor system were analyzed.Motion equation of hydrodynamic sliding bearing-rigid rotor system with gyroscopic effects was established.Hori bearing model was employed to calculate nonlinear oil film forces and their Jacobian matrix.Poincaré map and Newton-Raphson method were combined to find the periodic responses.The stability and bifurcation of the periodic responses were analyzed with Floquet stability bifurcation theory.Taking the rotating speed a...