脉动风特性及其仿真研究  

CHARACTERISTICS AND SIMULATING METHOD OF PULSATING WIND

作　　者：李英民[1] 赖明[1] 赵青 张川 

机构地区：[1]重庆建筑工程学院

出　　处：《工程力学》1993年第4期117-124,共8页Engineering Mechanics

基　　金：国家自然科学基金;霍英东教育基金资助

摘　　要：在高层建筑、高耸结构和大跨度结构设计时,由于这些结构基本周期较长,风振对其设计具有较大的影响。本文通过大量现场实测脉动风记录,利用参数识别技术和优化方法,研究了脉动风速的功率谱,并与Davenport水平脉动风速谱等进行了比较;本文根据Davenport水平风速谱、西安热工所水平风速谱和本文研究的水平风速谱,利用自回归滑动平均(ARMA)模型及参数识别技术,研究了人造脉动风方法。Wind vibration often has more effectes on the design of tall buildings, high-tower structures and big-span structures, for the periods of the structures are all long. Having exploried a great number of records of pulsating wind in the spot, this paper studies the power spectrum of pulsating wind velocity by using parameter identification technique, and the comparison with the spectrum of level wind velocity of Davenport. Also, using Auto-regressive Moving Average Model and parameter identification technique, the paper presents a method to simulate pulsating wind according to the spectra of level wind velocity of Davenport, provided by Xi'an Institute of Heat Engineering and presented in this paper, respectively.

关 键 词：结构风振 脉动风 参数识别 功率谱 

分 类 号：TB12[理学—工程力学]