摘要
将叶轮转子系统简化为Jeffcott转子,在流体激振力和非线性油膜力作用下建立了带有碰摩与裂纹耦合的动力学模型,并推导了系统的无量纲运动方程。运用数值积分法分析了系统响应随转子偏心量和转速变化的分岔图、相图、Poincare映射图和时序响应图等,最后讨论了流体激振力和偏心量对叶轮转子分岔特性的影响。
An impeller-rotor system is simplified to a Jeffcott rotor system in this paper. The dynamic model of impeller-rotor, subjected to both a lateral fluid force and nonlinear oil-film force, with coupling faults of rub-impact and crack is built and dimensionless equations of the system are derived. The nonlinear dynamic characteristics of the system, such as bifurcation diagrams, phase trajectory, Poineare pictures, time response and etc., when the mass eccentricity and the rotor speed changes are studied using the numerical integral method. The influence of the nonlinear lateral fluid force and mass eccentricity on the dynamic characteristics of system are analyzed in detail in the last part of this paper.
出处
《价值工程》
2012年第19期43-44,共2页
Value Engineering
关键词
转子
流体激振力
偏心
分岔
rotor
lateral fluid force
eccentricity
bifurcation
