本征正交分解法在屋盖结构风场模拟中的应用  

APPLICATION OF PROPER ORTHOGONAL DECOMPOSITION METHOD IN WIND FIELD SIMULATION FOR ROOF STRUCTURES

作　　者：李璟[1] 韩大建[1] 

机构地区：[1]华南理工大学土木工程系,广东广州510640

出　　处：《工程力学》2009年第3期64-72,共9页Engineering Mechanics

基　　金：广州市科委科技攻关引导项目(2004Z3-E0351)

摘　　要：介绍了谐波合成法和本征正交分解法,然后通过平屋面风场本征正交分解与重构的研究,证实了利用B样条插值和风场重构方法扩展风场的有效性。在此基础上,首次提出了屋盖结构风场两步模拟方法。算例分析结果表明,该方法模拟精度高,而且计算效率也高。佛山世纪莲体育场屋盖风场模拟的算例说明该方法应用于大型屋盖抗风分析的显著优势。The Weighted Amplitude Wave Superposition （WAWS） method and the Proper Orthogonal Decomposition （POD） technique are first introduced. Then the POD technique combined with a wind field reconstruction method for a fiat roof is studied. And also, wind field extension using the B-spline interpolation and the wind field reconstruction method are verified. On the basis, a two-step simulation algorithm to generate wind field is presented for roof structures. Numerical examples prove that the presented algorithm is accurate and efficient. Especially the engineering example, a wind field simulation of the roof of Foshan Century Lotus Stadium, shows that the proposed method is advantageous for the wind-resisting analysis of a large roof.

关 键 词：屋盖结构 风场模拟 本征正交分解法 风场重构 B样条插值 

分 类 号：O211.6[理学—概率论与数理统计] TU311.3[理学—数学]