A study on buffeting force test and correlation based on active grid turbulence field
XIANG Dan1，ZHU Lishan2，NIU Huawei1
1.Key Laboratory for Wind and Bridge Engineering of Hunan Province, Hunan University, Changsha 410082, China;
2.Hunan Road & Bridger Construction Group Corp, Changsha 410004, China
Abstract：In order to study the correlation of buffeting forces on a bluff body, a rectangular cylinder was taken as an example.In the pulsating flow field of active grids, a pressure measurement method was applied to study the span-wise buffeting force under turbulent flow, combined with different correlation model fitting methods.The spatial correlation of buffeting force was compared with static and moving states to analyze the influence of the self-excited force on the correlation of the buffeting force, by decomposing the two forces with matlab.Two different force measurement methods (synchronous pressure measurement) were compared by a balance force test.The results show that the span-wise correlation of buffeting force decreases with the frequency and span spacing.Under the influence of aerodynamic self-excited force, the correlation was improved and larger than that of turbulence.
向丹1，朱立山2，牛华伟1. 基于主动格栅脉动流场的抖振力测试与相关性研究[J]. 振动与冲击, 2020, 39(8): 123-130.
XIANG Dan1，ZHU Lishan2，NIU Huawei1. A study on buffeting force test and correlation based on active grid turbulence field. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(8): 123-130.
[1] Larose G L. The spatial distribution of unsteady loading due to gusts on bridge decks[J]. Journal of wind engineering and industrial aerodynamics, 2003, 91(12-15): 1431-1443.
[2] Larose G L, Mann J. Gust loading on streamlined bridge decks[J]. Journal of Fluids and Structures, 1998, 12(5): 511-536.
[3] Jakobsen J B. Span-wise structure of lift and overturning moment on a motionless bridge girder[J]. Journal of wind engineering and industrial aerodynamics, 1997, 69: 795-805.
[4] Kimura K, Fujino Y, Nakato S, et al. Characteristics of buffeting forces on flat cylinders[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1997, 69: 365-374.
[5] 马存明. 流线箱型桥梁断面三维气动导纳研究[D].西南交通大学,2007.
MA Cun-ming. 3D Aerodynamic Admittance Research of Streamlined Box Bridge Decks [D]. Southwest Jiaotong University, 2007.
[6] 白桦,何晗欣,刘健新,赵国辉,高亮.格栅紊流风特性参数模拟规律研究[J].振动与冲击,2016,35(22):209-214.
BA Hua, HE Han-xin, LIU Jian-xin, ZHAO Guo-hui, GAO Liang. Wind Characteristic Parameters in Grille Turbulent Flow. [J] Journal of Vibration and Shock, 2016,35(22):209-214.
[7] 李少鹏,李明水,马存明.矩形断面抖振力展向相关性的试验研究[J].工程力学,2016,33(01):39-46.
LI Shao-peng, LI Ming-shui, MA Cun-ming. Experimental Investlgation of The Span-wise Correlation of Buffeting Forces on a Rectangular Section [J]. Engineering Machanics, 2016,33(01):39-46.
[8] 李春光. 紊流风场中大跨度桥梁非线性气动稳定性研究[D]. 长沙: 湖南大学, 2011.
LI Chun-guang. Study on Nonlinear Aerodynamic Stability of Long-span Bridge in Turbulence flow [D]. Chang Sha: Hunan University, 2011.
[9] 牛华伟,吴润泽,陈谨林,陈政清.基于浮框式测力模型的桥梁涡激力特性研究[J].湖南大学学报(自然科学版),2017,44(11):135-144.
NIU Hua-wei, WU Run-ze, CHEN.Jin-lin, CHEN.Zheng-qing. The Research on Aerodynamic Test Techniques Based on the Force and Pressure Composite Segment Model. [J]. Journal of Hunan University(Natural Sciences), 2017,44(11):135-144.
[10] Davenport A G. The response of the slender, line-like structures to a gusty wind [J]. ICE Proceedings, 1962, 23(3): 389―408.
[11] 陈政清.桥梁风工程.第1版.北京:人民交通出版设，2005,5.
CHEN Zheng-qing. Bridge Wind Engineering. First Edition. Beijing: China Communications Press, 2005,5.
[12] ESDU 86010.Characteristic of atmospheric turbulence near the ground. Part: variations in space and time for strong winds(neutral atmosphere).London:Engineering Sciences Data Unit,1986.
