【摘要】 将叶轮转子系统简化为Jeffcott转子,建立了不平衡离心叶轮转子在非线性横向流体激振力和非线线轴承油膜力作用下的振动模型,并推导了系统的无量纲运动方程。运用数值积分法研究了系统的分岔特性。最后分析了横向流体激振力以及叶轮不平质量对离心叶轮系统动力学性能的影响。更多还原

【Abstract】 A centrifugal impeller system is simplified to a Jeffcott rotor system.The dynamic model of this eccentric centrifugal Impeller-rotor with both nonlinear lateral fluid force and nonlinear oil-film force is built and dimensionless equations of the system are derived.Its bifurcation characteristics are studied using the numerical integral method.The influence of the nonlinear lateral fluid force and the nonlinear oil film force on the dynamic characteristics of the system are analyzed in detail.更多还原