计算机与现代化 ›› 2012, Vol. 1 ›› Issue (9): 137-139,.doi: 10.3969/j.issn.1006-2475.2012.09.034

• 算法分析与设计 • 上一篇    下一篇

大气边界层中结构风载的计算方法比较

杜强1,谭三2,刘宁2   

  1. 1.西华大学机械工程与自动化学院，四川成都610039； 2.西华大学数学与计算机学院，四川成都610039
  • 收稿日期:2012-05-03 修回日期:1900-01-01 出版日期:2012-09-21 发布日期:2012-09-21

Comparison for Computational Methods to Structures of Wind Loads in Atmospheric Boundary Layer

DU Qiang1, TAN San2, LIU Ning2   

  1. 1. School of Mechanical Engineering and Automation, Xihua University, Chengdu 610039, China；2. School of Mathematics and Computer Engineering, Xihua University, Chengdu 610039, China
  • Received:2012-05-03 Revised:1900-01-01 Online:2012-09-21 Published:2012-09-21

被引次数

4

摘要： 风载是大气边界层中露天结构的主要侧向载荷。针对目前工程中普遍采用的理论计算方法及计算流体动力学(Computational Fluid Dynamics，CFD)方法，分别论述利用CFD方法和理论计算方法计算结构风压及风载的原理。采用基于Reynolds时均N-S方程和标准k-ε湍流模型对一简单结构在不同高度的风压分布进行数值模拟，分析结构表面风压的分布特性，在此基础上比较两种计算方法的优劣。研究结果表明，由于未考虑结构脉动风载，数值计算结果较理论计算更小，但CFD方法可以获得风场中参数的更多信息，在对复杂结构的风载计算方面更方便有效。

关键词: 风载, 大气边界层, 计算方法, 结构

Abstract: Wind load is one of mainly lateral loads on structures in atmospheric boundary layer. Aimed to the method of theoretical computation and Computational Fluid Dynamics that are adopted by engineering widely, the principle about two methods to compute the wind pressure and wind loads on structures is elaborated. Furthermore, the pressure distributions on a simple structure with different elevation are numerically computed based on the Reynolds-averaged N-S equations and the standard k-ε turbulent model, and the characteristics of the wind pressures on the structure are discussed, then two computational methods are compared. The computed results show that the wind loads on the structure computed by numerical method are lower than those of theoretical method because the fluctuating wind loads on the structure are ignored. But, CFD can obtain more information for the parameters in wind field, and it is more convenience for computation of wind loads on structures with complex shape.

Key words: wind loads, atmospheric boundary layer, computational method, structures

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