基于小波重构的脉动风合成及特性研究  

SYNTHESIS AND CHARACTERISTIC OF FLUCTUATING WIND BASED ON WAVELET RECONSTRUCTION

作　　者：赵建昌[1] 刘爱平[1] 尚歆[1] 邹立华[1] 

机构地区：[1]兰州交通大学土木工程学院,核工业北京化工冶金研究院,兰州730070,北京101149

出　　处：《振动与冲击》2008年第6期140-143,共4页Journal of Vibration and Shock

基　　金：兰州交通大学“青蓝”人才工程基金;甘肃省建设科技攻关项目资助

摘　　要：针对傅里叶变换的谐波合成脉动风的理论不足,提出一种小波重构合成脉动风方法,以控制频带能量为标准推导脉动风合成公式。通过计算机仿真分析,结果表明小波重构合成的脉动风具有良好的时频非平稳性,能够反映脉动风特性;同时,分析了在合成脉动风时小波函数基的选取方法和分层数的选取。Because of the shortage of synthesis of fluctuating wind theory by using Fourier transformation,one method of wavelet reconstruction for fluctuating wind synthesis is proposed based on standard of controlling frequency band energy,the formula of fluctuating wind synthesis is deduced.Using computer simulation,the results show that fluctuating wind synthesis with time frequency nonstationarity can reflect normal characteristic of fluctuating wind.At the same time,the selection method of Wavelet bases and hierarchy number is also analyzed here.

关 键 词：脉动风 小波重构 风速度功率谱 时频非平稳性 小波基 

分 类 号：TU352.1[建筑科学—结构工程]