ARMA模型及参数识别技术在脉动风仿真中的应用

随着高层建筑、高耸结构及悬索结构等相对较柔的结构物在工程中日益广泛使用,结构物在脉动风作用下的响应分析愈来愈受到工程界的重视,有效地给出具有一定统计规律的脉动风记录对结构风振分析及工程抗振设计都是十分必要的。本文研究了采用自回归滑动平均(ARMA)模型和参数识别技术模拟给定条件(如功率谱或某种统计特征)的脉动风记录的计算机仿真方法。结果表明,本文提出的模拟方法是一种有效的脉动风仿真方法。

APPLICATION OF ARMA MODEL AND PARAMETER IDENTIFICATION TO SIMULATION OF PULSATING WIND

With the wide use of tall buildings,highrise structures,suspended structures and some other flexible structures,the analysis ofstructure responses under pulsating wind has been more and more valuedin the field of engineering.It is necessary to effectively give pulsatingwind records with certain stochastic characteristics for the analysis ofstructure responses under winds and the design of anti-vibration struc-tures.Using autoregressive moving average(ARMA)model and techoniqueof parameter identification,this paper studies the method to simulatingpulsating winds which are compatible with given factors(such as powerspectrum or other stochastic characteristics).The conclution shows thatit is an effective method.