摘要
应用非线性动力学现代理论对建立的碰摩转子模型进行了研究 ,结果表明 ,随着转速的提高 ,系统具有拟周期、周期、混沌运动交替出现的现象 ,且在不同的混沌区表现为不同的吸引子 ,高维拟周期轨道在 Poincare截面上表现出特殊的封闭形式。同时还揭示了阻尼对系统复杂运动的抑制作用和非线性刚度使系统运动进一步复杂等现象。这些现象对准确诊断碰摩故障。
In the paper, the mathematic model of the rotor system with rub impact is analyzed by applying modern nonlinear dynamics theory. As a result, it is indicated that the motion of the rotor system alternates among the periodic, chaotic and quasi periodic vibrations, as rotating speed increases. Meanwhile, different chaotic regions show different attractor configurations. Effect of damping on restraining complicated responses is shown by the bifurcation diagrams, in addition to effect of nonlinear stiffness on encouraging complicated responses. The phenomena are of great importance to accurately diagnose rub impact failure, reduce failure ratio and improve the characteristics of the rotor system.
出处
《机械科学与技术》
CSCD
北大核心
2002年第6期923-927,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金重大项目 19990 5 10资助
关键词
动力学
混沌
分岔
转子
碰摩
故障
Chaos
Bifurcation
Rotor system
Rub impact
Failure
