[1]李加武,林志兴,项海帆..极端桥梁断面雷诺数效应研究[J].郑州大学学报(工学版),2003,24(02):22-25.[doi:10.3969/j.issn.1671-6833.2003.02.006]
　Li Jiawu,LIN Zhixing,Xiang Haifan.Study on Reynolds number effect of extreme bridge cross-section[J].Journal of Zhengzhou University (Engineering Science),2003,24(02):22-25.[doi:10.3969/j.issn.1671-6833.2003.02.006]

点击复制

极端桥梁断面雷诺数效应研究()

分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

24

期数:

2003年02期

页码:

22-25

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Study on Reynolds number effect of extreme bridge cross-section

作者:

李加武; 林志兴; 项海帆.

同济大学土木工程防灾国家重点试验室,上海,200092, 同济大学土木工程防灾国家重点试验室,上海,200092, 同济大学土木工程防灾国家重点试验室,上海,200092

Author(s):

Li Jiawu; LIN Zhixing; Xiang Haifan

关键词:

雷诺数效应;  流线型断面;  Strouhal数;  阻力系数;  升力系数

Keywords:

Reynolds number effect;  Streamlined cross-section;  Strouhal number;  drag coefficient;  Lift coefficient

DOI:

10.3969/j.issn.1671-6833.2003.02.006

文献标志码:

A

摘要:

利用热线风速仪对两种极端桥梁断面的尾迹区的脉动风风速进行了测量,以模型高度为特征尺寸换算得到Strouhal数,并利用天平测得模型的三分力系数.以此为基础,分析了以梁高为特征尺寸的雷诺数与上述参数的关系.试验结果表明,在以П形梁为代表的钝体桥梁断面中雷诺数效应很小,可以忽略不计;在以南京二桥为代表的流线形断面的雷诺数效应不可以忽略,同时,试验表明传统的低雷诺数风洞试验给出的三分力系数结果偏于保守.

Abstract:

The pulsating wind speed in the wake area of the two extreme bridge sections was measured by the hot wire anemometer, the Strouhal number was converted by the characteristic size of the model height, and the three-component force coefficient of the model was measured by the balance. Based on this, the relationship between the Reynolds number with beam height as the characteristic dimension and the above parameters is analyzed. The experimental results show that the Reynolds number effect in the blunt bridge section represented by П-shaped beam is small and negligible. The Reynolds number effect in the streamlined section represented by the Nanjing Second Bridge cannot be ignored, and the experimental results show that the three-component force coefficient results given by the traditional low Reynolds number wind tunnel test are conservative.

常用功能