两类建筑结构脉动风场的数值模拟

上海大学学报(自然科学版) ›› 2009, Vol. 15 ›› Issue (2): 191-198.

两类建筑结构脉动风场的数值模拟

徐旭，屈应辉，刘玉

（上海大学土木工程系，上海 200072）

收稿日期:2007-11-22 出版日期:2009-04-22 发布日期:2009-04-21
通讯作者: 徐〓旭（1968～），男，副教授，博士,研究方向为结构动力学和风工程. E-mail:xxu@mail.shu.edu.cn
作者简介:徐〓旭（1968～），男，副教授，博士,研究方向为结构动力学和风工程. Email:xxu@mail.shu.edu.cn
基金资助:
上海市教委基金资助项目（212653）

Simulation of Fluctuating Wind Fields around Two Kinds of Civil-Engineering Structures

XU Xu,QU Yinghui,LIU Yu

(Department of Civil Engineering, Shanghai University, Shanghai 200072, China)

Received:2007-11-22 Online:2009-04-22 Published:2009-04-21

摘要/Abstract

摘要：

基于随机模拟理论的谱解法以及快速傅里叶变换（FFT）技术，运用MATLAB语言编程模拟两类典型结构物周围的脉动风场，并给出部分节点的脉动风速时程曲线.模拟的过程中考虑结构不同点的空间相关性，并采用多种方法验证本程序和数值模拟结果的正确性.FFT技术能大大提高程序运算速度，而传统的谱解法又能保证模拟的精度，使得脉动风速的数值模拟结果能满足工程分析的需要.

关键词: 随机过程；数值模拟；脉动风场；谱解法

Abstract:

Using a spectral representation method in the theory of stochastic simulation, and the fast Fourier transform (FFT) technology, fluctuating wind fields around two typical structures are simulated with MATLAB. Time-history curves of fluctuating wind at some nodes are presented. Correlation of different points on the structure is considered. Various methods have been used to verify correctness of the numerical results. The program is showed to be very efficient with the FFT. Meanwhile, precision of the traditional spectral representation is preserved. It is found that the simulation results of fluctuating wind well meet the requirement of engineering analysis.

Key words: stochastic process; numerical simulation; fluctuating wind field; spectral representation

中图分类号:

TU 311

徐旭，屈应辉，刘玉. 两类建筑结构脉动风场的数值模拟[J]. 上海大学学报(自然科学版), 2009, 15(2): 191-198.

XU Xu, QU Ying-Hui, LIU Yu. Simulation of Fluctuating Wind Fields around Two Kinds of Civil-Engineering Structures[J]. Journal of Shanghai University（Natural Science Edition）, 2009, 15(2): 191-198.