脉动风荷载时程数值模拟研究

摘要

Nowadays, engineering structure is increasingly becoming large,complicated and ultrahigh transfinite,and research of structure wind vibration response attracts the attention of academia and engineering field . It is helpful to grasp the wind-induced vibration characteristics of the structures and reduce wind -induced disasters by numerical way to simulate the fluctuating wind load. Near surface wind characteristics and the principle of the linear filtering method and harmonic superposition method to simulate the fluctuating wind load are introduced in this paper, specifically the mathematical process of simulation the fluctuating wind load by the harmonic superposition method is mainly researched.%在工程结构日趋大型化、复杂化、超高超限化的今天，建筑结构风振响应的研究受到学术界、工程界的关注和重视，数值模拟方法生成脉动风时程对于掌握结构风振特性、减少风致灾害有很好的帮助作用。介绍了近地表层风场的基本特性，阐述了实际工程应用过程中的线性滤波法和谐波叠加法模拟脉动风时程的原理，重点对谐波叠加法模拟脉动风速时程的数学形成过程进行了研究。