不同挑棚式样对体育场内场风影响的数值模拟研究

The Imitating Analysis Study at the Influences on the Field Wind inside Stadium which is Caused by Different Canopy Models

田径规则规定当风速超过2m/s时,创造的世界纪录不予认可,因此体育场设计过程中应重视外部环境对体育场内场风的影响。造成体育场内场风速变化的影响因素较多,其中建筑物的结构形式是一个很重要的影响因素。本文选取某市奥体中心体育场建筑施工图原图建模,运用数字化手段对挑棚样式进行优化,采用数值模拟的方法对不同挑棚样式对体育场内场风的影响进行了研究,得出了不同挑蓬样式的内场风风等值线图和速度矢量图,显示了内场风场的变化,提出了风影响预报,为体育场设计及使用过程中引入环境风分析提供了依据。

According to the athletics rule, the word records will not be validated when the wind speed is over 2 meters a second,There are many factors which affect the change of speed of the field wind inside stadium and canopy model is the very important aspect. For the filed wind study, it is difficult to solve these complex problems by the analysis using the theory of hydrodynamics, and there are also many disadvantages by experiments, such as wasting time and labor, high cost and the weak suitability, we chose the stadium construct map in a city＇s Olympic Game Centre to build a model in this passage. We optimize the canopy model by the digitized means, make a study at the filed wind in different canopies by the imitating analysis method. We get the wind equivalent line map and the speed vector map in different canopies which show the change of the wind field inside stadium, raise the wind influence forecast and give an very important accordance for the environment wind analysis in stadium design and the use.