基于非线性动力学的风机叶轮系统流固耦合振动研究  

Nonlinear Dynamic Analysis of Fluid-Structure Coupled Vibration of Impeller System in Ventilating Fan

作　　者：谷勇霞[1] 周忠宁[2] 

机构地区：[1]北京工商大学机械工程学院,北京100037 [2]中国矿业大学机电学院,江苏徐州221008

出　　处：《噪声与振动控制》2009年第5期34-37,130,共5页Noise and Vibration Control

基　　金：江苏省自然科学基金资助项目(项目号BK2005018)

摘　　要：利用相空间重构、关联维、近似熵和L-Z复杂度等非线性动力学分析方法,定性和定量地分析了风机级间流场压力脉动与叶轮叶片振动信号随工况变化的特征和规律。研究结果表明:二者之间具有互体现性,存在耦合关系。The features and laws of flow field and pressure pulsation within two counter-rotating rotors and tip vibration signals of blades under different conditions are analyzed. Some nonlinear dynamic analysis methods, such as phase-space reconstruction, correlation dimension, approximate entropy, and L-Z complexity, are employed. The results demonstrate that the pressure pulsation and tip vibration are mutually related and coupled.

关 键 词：振动与波 非线性动力学 流固耦合 相空间重构 关联维 近似熵 

分 类 号：TH43[机械工程—机械制造及自动化] O322[理学—一般力学与力学基础]