水下涡轮机转子-滚动轴承非线性振动仿真  

Simulation for Nonlinear Oscillation of an Underwater Turbine Bearing-Rotor

作　　者：孙军亮[1] 梁跃[1] 李代金[2] 党建军[2] 罗凯[2] 

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

出　　处：《计算机测量与控制》2012年第3期747-750,共4页Computer Measurement &Control

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方法对系统动力学模型进行了数值仿真,基于混沌与分岔理论分析了系统的非线性振动;研究表明,转速较低时,系统的响应以VC周期振动为主;提高转速,系统在旋转频率、VC频率的组合激励下,表现出拟周期振动;继续提高转速时,系统经历阵发性分岔进入混沌状态;研究结论对水下涡轮机系统设计具有重要意义。For the unbalanced bearing--rotor system, considering the nonlinear Hertzian contact force and the radial internal clearance of bearing, an nonlinear dynamic model is established. Using Rouge--Kutta--Felhberg of variational step, the nonlinear oscillation is simulated based on bifurcation and chaos theory. Analysis results indicate that： VC periodic oscillation is principal with low rotate speed; Enlargement rotate speed, quasi--period oscillation is showed under the effection of rotate frequency and VC frequency; With high rotate speed, the system would pass through fitful bifurcation to chaos. The analytic results provide the theoretical reference for designing the underwater turbine engine.

关 键 词：非线性振动 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]