摘要
将离心叶轮转子系统简化为Jeffcott转子系统,在考虑非线性油膜力的基础上,综合考虑了系统的流体激振力,建立了含有裂纹故障转子的动力学模型。运用数值积分法分析了不同裂纹角下系统响应随转速变化的分岔图、相图和Poincare映射图等,结果表明,裂纹深度一定的情况下,随着裂纹角的增大,流体激振力和非线性油膜力对转子系统分岔特性的影响也逐渐增大。
An impeller-rotor system is simplified to a Jeffcott rotor system in this paper. The dynamic model of the cracked rotor with both nonlinear oil-film force and a lateral fluid force is built. The nonlinear dynamic characteristics of the system, such as bifurcation diagrams, phase trajectory, poincare pictures and etc. are studied using the numerical integral method, when the crack angle changes. The results show that the lateral fluid force and nonlinear oil-film force make the motion more complicated as the crack angle increases, while the crack depth does not change.
出处
《现代机械》
2010年第1期24-25,44,共3页
Modern Machinery
基金
甘肃省自然科学基金(2008GS02617)
关键词
转子
裂纹角
流体激振力
分岔
rotor
crack angle
lateral fluid force
bifurcation
