大幅受迫振动下建筑结构风效应和风场模拟  

Simulation of structural wind effects and wind field around building structures subjected to forced vibration

作　　者：李俊龙[1] 周岱[1] 涂佳黄[1] 黄橙[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《中国科技论文在线》2011年第5期342-346,共5页

基　　金：高等学校博士学科点专项科研基金资助项目(200802480056)

摘　　要：针对大幅受迫振动下建筑结构周围风场和风压的数值模拟问题,基于任意拉格朗日-欧拉(ALE)方法,结合流线迎风Petrov-Galerkin(SUPG)方法和三步有限元方法,提出了一种适用于模拟带运动边界、高雷诺数来风的稳定化流体有限元大涡模拟方法,进而用于分析屋盖大幅值受迫振动下的建筑结构周围风场及其风压分布。研究显示,屋盖大幅值受迫振动对屋盖风效应影响较大,明显改变结构表面平均风压分布和风压脉动分布。Aiming at structural wind effects and wind field around buildings subjected to the forced vibration, a large eddy simulation stabilized fluid finite element was proposed to simulated the wind field with high Reynolds number under the circumstance of moving boundaries, based on arbitrary Lagrangian-Eulerian （ALE） method, combined with streamline upwind Petrov-Galerkin（SUPG） method and three-step finite element method. Also, the wind pressures upon the forced vibration roof were numerically predicted. Results show that the forced vibration roof has great influence on roof wind effects, such as the time-averaged wind pressure and fluctuating wind pressure and so on.

关 键 词：任意拉格朗日-欧拉方法 稳定化流体有限元 风场模拟 风压分布 

分 类 号：TU311.3[建筑科学—结构工程]