水下涡轮机转子系统非线性动力学特性研究  

Nonlinear Dynamic Response Analysis of an Underwater Turbine Rotor System

作　　者：李代金[1] 孙军亮[2] 梁跃[2] 罗凯[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072 [2]中国船舶重工集团公司第七〇五研究所,陕西西安710075

出　　处：《压电与声光》2012年第5期708-711,共4页Piezoelectrics & Acoustooptics

摘　　要：在考虑支承滚动轴承内部间隙、轴承非线性Hertz接触刚度及转子不平衡量的基础上,建立了水下涡轮机刚性水平转子系统的动力学模型;采用变步长的Rouge-Kutta-Felhberg法对系统动力学模型进行了数值解析,基于混沌与分岔理论分析了系统的非线性动力学特性。研究表明,随着轴承间隙的增大,系统混沌响应区变宽;随着转速的提高,系统在转子不平衡激励、轴承变柔度激励作用下,经周期、拟周期、混沌的振动变化过程。The nonlinear dynamic model of the underwater turbine rotor has been established considering the radial internal clearance of the bearing,the nonlinear Hertz contact force and the unbalance of the rotor.The numerical analysis of the dynamic model has been performed by using Rouge-Kutta-Felhberg of variational step and the nonlinear dynamic characteristics of the system have been analyzed based on the bifurcation and chaos theory.The results indicated that the chaos of the system broadened with the enlargement of bearing clearance;with the increase of the rotating speed,the system would pass through period,quasi-period and chaos processes under the excitation of the unbalanced and the nonlinear Hertzian contact force.

关 键 词：非线性动力学 混沌与分岔 水下涡轮机 轴承-转子系统 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]