对旋风机流固耦合信号时频分析  

Fluid-solid Coupling Signal Time-frequency Analysis of Contrarotating Fan

作　　者：马丽娜[1] 李意民[1] 钟骏薇[1] 

机构地区：[1]中国矿业大学电力工程学院,江苏徐州221116

出　　处：《煤矿机械》2012年第9期80-82,共3页Coal Mine Machinery

基　　金：中央高校基本科研业务费用专项资金资助(2010QNA13)

摘　　要：为深入研究对旋风机流固耦合特性,采用时频分析技术对风机的流固耦合信号进行分析。运用Matlab软件编制程序,基于研究结果,得出如下结论:在小波重构信号的基础上,对重构信号进行短时傅里叶变换,结果表明耦合信号在时间分布上呈现脉动性分布,且存在一定的时延性;通过对小波重构信号的CWD分析表明,耦合信号的能量分布具有很好的相互体现性,且在时间分布上的能量分布随着流量的减少而由连续分布趋向于间歇式分布。In order to study characteristics of contra-rotating fan, the paper analysis fluid-solid coupling signal using time-frequency analysis. Based on research results, the conclusions are following： Transforming signal with short-time fourier transform based on wavelet reconstruction signal, the results show that coupling signal presents pulsation distribution and certain time-ductility in time distribution. The CWD analysis based on wavelet reconstruction signal shows that energy distribution of coupling signal has good mutual reflection, and energy distribution in time distribution presents from continuous distribution to gap distribution with reduction in flow.

关 键 词：对旋风机 流固耦合 时频分析 CWD 

分 类 号：TD724[矿业工程—矿井通风与安全]