| 覆冰斜拉索气动力的试验与数值研究 |
| |
| 引用本文： | 李寿英,,黄 韬,叶继红.覆冰斜拉索气动力的试验与数值研究[J].湖南大学学报(自然科学版),2012,39(8):1-6. |
| |
| 作者姓名： | 李寿英 黄 韬 叶继红 |
| |
| 作者单位： | 东南大学混凝土及预应力混凝土结构教育部重点实验室;湖南大学风工程试验研究中心 |
| |
| 基金项目： | 东南大学混凝土及预应力混凝土结构教育部重点实验室开放课题资助 |
| |
| 摘 要： | 斜拉桥拉索表面形成的覆冰可能会使斜拉索发生不稳定的驰振振动.首先,制作了6种覆冰截面的拉索模型,几何缩尺比为1∶1;然后,进行了静力天平测力风洞试验,得到了6种覆冰截面的平均升力系数和平均阻力系数,并给出了驰振力系数;最后,采用Fluent软件模拟了2种覆冰截面的绕流情况,并给出了平均升力系数.结果表明:上述6种覆冰截面的驰振力系数均远小于零,存在发生驰振的可能性;CFD模拟得到的平均升力系数与试验结果吻合较好.
|
| 关 键 词： | 拉索 覆冰 气动力 风洞试验 CFD模拟 |
Experimental and Numerical Investigations of the Aerodynamic Forces on Stay Cables with Iced Accretion |
| |
| LI Shou-ying,HUANG Tao,YE Ji-hong.Experimental and Numerical Investigations of the Aerodynamic Forces on Stay Cables with Iced Accretion[J].Journal of Hunan University(Naturnal Science),2012,39(8):1-6. |
| |
| Authors: | LI Shou-ying HUANG Tao YE Ji-hong |
| |
| Institution: | 1(1.Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast Univ,Nanjing, Jiangsu 210096,China;2.Research Center of Wind Engineering,Hunan Univ,Changsha,Hunan 410082,China) |
| |
| Abstract: | Iced accretions on stay cables may result in unstable vibration of galloping,which affects the safety of cable-stayed bridges.Firstly,six kinds of stay cable models with iced accretions were manufactured with a geometrical scale of 1∶1,and wind tunnel tests were carried out to obtain the mean lift and drag coefficients.Galloping coefficients were then analyzed to estimate the possibility of galloping.Secondly,CFD simulations were conducted on two kinds of models with iced accretion,and the results were compared with those from wind tunnel tests.The results have shown that galloping takes place because the galloping coefficients are less than-10,and the results between wind tunnel tests and CFD simulations have very good agreement. |
| |
| Keywords: | cables iced accretion aerodynamic forces wind tunnel tests CFD simulation |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《湖南大学学报(自然科学版)》浏览原始摘要信息 |
| 点击此处可从《湖南大学学报(自然科学版)》下载免费的PDF全文 |
|
