环状悬挑屋盖平均风压与风环境数值模拟  

Numerical Simulation of Wind Pressure Distribution and Wind Environment on the Round Cantilevered Roof

作　　者：汪丛军[1] 黄本才[1] 徐晓明 林高 

机构地区：[1]同济大学固体力学教育部重点实验室,上海200092 [2]上海建筑设计研究院,上海200041

出　　处：《同济大学学报（自然科学版）》2006年第6期711-715,725,共6页Journal of Tongji University:Natural Science

摘　　要：首先对一个较简单的矩形悬挑挑篷进行数值风洞模拟,得到的Baseline雷诺应力模型较适合于悬挑类型的挑篷或屋盖,随后将该湍流物理模型应用到虹口足球场悬挑屋盖中.通过与风洞实验结果的比较,可看出数值模拟方法预测复杂的环状屋盖平均风压是可行的;从数值模拟内场1.5 m高度平均风速矢量图结果可知,数值模拟方法预测体育场内的风环境有独特的优越性.最后通过环状悬挑屋盖与单侧、双侧悬挑挑篷数值模拟结果的比较,进一步看出环状悬挑屋盖所受风力的主要特点.The numerical simulation of a simple rectangle cantilevered roof is carried out. The result shows that Baseline（BSL） Reynolds stress model is more suited to the simulation of cantilevered roofs. Then BSL model is applied to the simulation of wind pressure on the cantilevered roof of Hongkou football stadium. The comparison between the coefficient of mean wind pressure on the roof and the results of wind tunnel test shows that the numerical simulation on the complex full perimeter of cantilevered roof is feasible. The velocity vector plot obtained on the height of 1.5 meter indicates numerical simulation can better predict wind environment. Finally a comparison is made between the model with two sides of roofs and one side of roof and the model with full perimeter of cantilevered roof to further discuss the characteristics of wind force on the grandstand roof.

关 键 词：环状悬挑屋盖 湍流物理模型 数值风洞 风洞实验 

分 类 号：TU245.1[建筑科学—建筑设计及理论] TU312.1