上海新电视塔风载试验研究

Wind-Tunnel Experimental Investigation of shanghai New Television Tower

本文主要分析上海浦东新电视塔上的风荷载分布情况。其风洞试验在中国气动力研究与发展中心低速所８ｍ×６ｍ大型低速风洞中进行，获得了电视塔模型上的整体气动荷致和压力分布。重点探讨了柱群与球体的气动力干扰、邻近建筑物对电视塔的干扰、迎风角变化的影响以及Ｒｅ数的模拟等问题。由试验可见，当二圆柱并列时，柱间易发生“双稳态偏流”，使处于尾流区的第三柱上的压力分布发生很大变化，并容易受激振动。当存在多柱干扰时，圆柱阻力将会增大。迎风角的变化对气动力分布也有很大影响。此外，对于球及圆柱结构，Ｒｅ数模拟非常重要，通过提高其表面粗糙度，可以提高有效Ｒｅ数。

The Shanghai New Television Tower with hemixpherical and cylindrical components is 454 meters high,which will be the highest TV tower in Asia,The experimental Investigation is aimed at determing the effects of pressure distributions,forces and moments on the isolated TV tower and those on the tower with neighbouring building considered when wind blows from different directions. The interaction effects of hemisphere and circular cylinders are observed and the infuence of Reynolds number is also mentioned this experiment. Al:100-scale model has been tested in the8m×6 m large scale low-Speed wind tunnel of China Aeredynamic Research and Development center (CARDC),It is shown that when two cylinders are arranged side by side,the“bistable nature of biased flow pattern,”will occur in the gap,causing great changes on the presure distributions on the third cylinder.Under the same wind speed and same wind angle,the results of isolated case and the case with neighbouring buildings considered are quite different.[