摘要
应用现代非线性动力学理论，分析了带有一端支座松动故障的简单转子系统的复杂运动现象，讨论了转速变化时系统具有的多种形式的周期、拟周期和混沌运动。在拟周期与混沌运动的轨道中，轨迹的方向性可以更清楚地表现出来。这类系统的某些周期运动的映射点结构具有慢变特性，有些表现为长时间下的拟周期运动；另外某些Ｐｏｉｎｃａｒｅ映射点的结构随时间的变化出现分岔。系统的这些复杂运动特征可望用来诊断这一故障。
Modern nonlinear dynamical system theory is used to analyze the complicated motion of a simple rotor bearing system with pedestal looseness at one support. Various forms of periodic, quasi periodic and chaotic motions are discussed by using the rotating speed as the control parameter. In the orbits of quasi periodic and chaotic motions the orientation of the orbits can be more clearly observed. The structures of the Poincare's maps for some periodic motions have slow varying characteristics and some of them show a kind of quasi periodic motion under long time condition. Some of the structures of Poincare's maps have bifurcation phenomenon as time is increased. These complicated motion features of the system can be used to diagnose the fault of pedestal looseness.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第4期60-63,共4页
Journal of Tsinghua University(Science and Technology)
关键词
转子系统
支座松动
混沌
故障诊断
轴承
rotor system
pedestal looseness
nonlinear dynamics
chaotic motion
