摘要
滚动轴承转子系统支承松动故障是旋转机械故障中常见且危害较大的故障,针对滚动轴承转子系统支承松动故障,考虑轴承松动间隙的非线性情况,以转子动力学、Hertz理论和非线性动力学理论为基础,建立含支承松动的转子系统动力学模型。通过数值仿真研究转子系统在松动间隙扩展时显示的分岔和混沌运动等复杂动力学现象及变化规律,研究表明,支承松动的转子系统在较低的转速和较小的间隙下也会出现混沌运动。这些结论为该类故障的工程诊断提供依据。
The dynamical equations of the rotor-bearing system with pedestal loosening at one support are derived by the theory of nonlinear dynamics and rotor dynamics. The complex motions including the period doubling bifurcation and chaos and their evolution against the variation of the rotating speed are studied by means of the phase maps, the bifurcate maps, the Poincare maps and the correlation dimension. The obtained analytical results provide some basis for diagnosing the fault of pedestal loosening.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2007年第3期387-389,共3页
Journal of Mechanical Strength
关键词
转子系统
轴承座松动
非线性理论
混沌运动
故障诊断
Rotor system
Pedestal loosening
Nonlinear theory
Chaotic motion
Faults diagnosis
