方形棱柱涡激压力空间相关性研究

详细信息    查看全文 | 推荐本文 |

英文篇名：Spatial correlation of vortex-induced pressure of a square prism section model 作者：朱乐东 ; 陈修煜 英文作者：ZHU Ledong;CHEN Xiuyu;State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University;College of Civil Engineering, Tongji University;Key Laboratory of Wind Resistance Technology of Bridges of Ministry of Transport, Tongji University; 关键词：方形棱柱节段模型 ; 沿截面相关性 ; 跨向相关性 ; 涡激压力 英文关键词：square prism section model;;span-wise correlation;;chord-wise correlation;;vortex-induced pressure 中文刊名：ZDCJ 英文刊名：Journal of Vibration and Shock 机构：同济大学土木工程防灾国家重点实验室;同济大学土木工程学院;同济大学桥梁结构抗风技术交通行业重点实验室; 出版日期：2019-04-28 出版单位：振动与冲击 年：2019 期：v.38;No.340 基金：国家自然科学基金面上项目(51478360);国家自然科学基金优秀国家重点实验室项目(51323013) 语种：中文; 页：ZDCJ201908007 页数：7 CN：08 ISSN：31-1316/TU 分类号：47-52+65

摘要

涡激共振是一种具有强迫和自激双重特性的非线性自限幅风致振动现象,目前对涡激共振的研究大多局限于二维涡激力非线性特性和数学模型,对涡激力的跨向相关性研究相对较少。采用方形棱柱节段模型,进行固定与弹簧悬挂两种状态下测压测振风洞试验,分析了固定与涡激共振两种情况时,作用于方形棱柱截面上的涡激压力沿跨向与截面的相关性规律。研究发现:涡激共振时棱柱断面涡激压力的跨向相关性好,并随跨向间距增加而衰减,同时振幅增大明显提高涡激压力跨向相关性;静止模型的涡激压力跨向相关性要差得多,随着跨向间距的增加相关系数下降至接近于0;截面不同测点涡激压力相关性不同,差异较大。
        Vortex-induced vibration is a kind of wind-induced nonlinear self-limiting vibration with both forced and self-excited characteristics. Current research on vortex-induced vibration is mostly confined to the two-dimensional nonlinear mathematical model of vortex-induced force, and the span-wise correlation research is relatively less. In this paper, the square prismatic section model was used in the fixed and spring suspended wind tunnel test to analyze the span-wise correlation and chord-wise correlation of vortex-induced pressure in the static condition and vortex-induced resonance two cases. It was found that the span-wise correlation of the vortex-induced pressure is good when in resonance, it decays along the bridge span and is significantly increased with the amplitude. The correlation is much worse in static condition, the correlation coefficient decreases close to 0 with the increase of the span-wise distance. The correlation rule of vortex-induced pressure varies a lot in different points.

引文

[1]项海帆,葛耀君,朱乐东,等.现代桥梁抗风理论与实践[M].北京:人民交通出版社,2005.
    [2]ROSHKO A.On the development of turbulent wakes from vortex streets:NACA TR 1191[R].[S.l.]:NACA,1954.
    [3]BERGER E,WILLE R.Periodic flow phenomena[J].Annual Review of Fluid Mechanics,1972,4:313-340.
    [4]WILLIAMSON C H K.Defining a universal and continuous Strouhal-Reynolds number relationship for the laminar vortex shedding of a circular cylinder[J].Physisc of Fluids,1988,31(10):2742-2744.
    [5]WILLIAMSON C H K.Oblique and parallel modes of vortex shedding in the wake of a circular cylinder at low Reynolds numbers[J].Journal of Fluid Mechanics,1989,206:579-627.
    [6]WILKINSON R H.Fluctuating pressures on an oscillating square prism.Part II:spanwise correlation and loading[J].Aeronautical Quarterly,1981,32(2):111-125.
    [7]肖军.闭口流线型箱梁涡激力展向相关性研究[D].长沙:湖南大学,2012.
    [8]黄来科.矩形断面涡激力展向相关性试验研究[D].长沙:湖南大学,2013.
    [9]刘志文,黄来科,陈政清.矩形断面主梁涡激振动气动力展向相关性试验研究[J].振动工程学报,2017,30(3):422-431.LIU Zhiwen,HUANG Laike,CHEN Zhengqing.Experimental study on spanwise correlation of aerodynamic forces of VIV of the rectangular section girder[J].Journal of Vibration Engineering,2017,30(3):422-431.
    [10]王孝楠.典型钝体断面涡激力特性及其跨向相关性研究[D].成都:西南交通大学,2017.
    [11]孟晓亮.大跨度钢箱梁桥竖向涡激共振非线性特性和机理研究[D].上海:同济大学,2013.
    [12]杜林清.中央开槽箱梁涡激扭矩非线性机理和跨向相关性及其数学模型[D].上海:同济大学,2014.
    [13]ZHU Ledong,MENG Xiaoliang,XU Youlin.Spanwise correlation behaviors of vortex-shedding lift force on a flat closed box deck[C]∥8th Asia-Pacific Conference on Wind Engineering.Chennai:APCWE,2013.
    [14]ZHU Qing,CHEN Bingyao,ZHU Ledong,et al.Investigation on characteristics and span-wise correlation of vortex-induced forces on a twin-box deck using newly-developed wind-tunnel test technique[J].Journal of Wind Engineering and Industrial Aerodynamics,2017,164:69-81.