不同风向角下线形布置双方柱脉动气动力特性研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (13) : 159-166.

论文

杨群1,2,3，吴倩云3，姜会民3，刘庆宽1,2,3，刘小兵1,2,3

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Fluctuating aerodynamic force characteristics of two square cylinders arranged inline under different wind direction angles

YANG Qun1，2，3, WU Qianyun3, JIANG Huimin3, LIU Qingkuan1，2，3, LIU Xiaobing1，2，3

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摘要

为了给实际工程中线形布置双方形截面结构的脉动风荷载提供参考，通过刚性模型风洞试验测试了不同风向角下线形布置双方柱在不同间距时的脉动气动力系数，并与单方柱的结果进行了对比分析。结果表明：线形布置双方柱的脉动气动力特性按风向角可分为小风向角（0°≤α≤10°）、中等风向角（10°＜α＜80°）和大风向角（80°≤α≤90°）三类。在小风向角和大风向角下，脉动气动力系数分别在3.0＜L/D＜4.0和2.0＜L/D＜3.0时发生突升，需引起设计的高度重视。在中等风向角下，脉动气动力系数随间距的变化没有发生突变，按风向角又可细分为10°＜α≤30°和30°＜α＜80°两类。 

Abstract

In order to provide a reference for fluctuating wind load of two structures with square cross-section arranged inline in practical engineering, fluctuating aerodynamic force coefficients of two square cylinders arranged inline under different wind direction angles and spacing ratios were measured with rigid model wind tunnel tests. The results were analyzed and compared with those of single square cylinder. The results showed that according to wind direction angles, fluctuating aerodynamic force characteristics of two square cylinders arranged inline can be divided into three types of small wind direction angle（0°≤α≤10°）, medium wind direction angle（10°＜α＜80°）and large wind direction angle （80°≤α≤90°）; under small wind direction angle and large one, fluctuating aerodynamic force coefficient rises abruptly within the ranges of 3.0＜L/D＜4.0 and 2.0＜L/D＜3.0; under medium wind direction angle, fluctuating aerodynamic force coefficient does not change abruptly with variation of spacing ratio L/D; according to wind direction angles, the type of medium wind direction angle can also be divided into two sub-types of 10°＜α≤30° and 30°＜α＜80°.

导出引用

杨群1,2,3，吴倩云3，姜会民3，刘庆宽1,2,3，刘小兵1,2,3. 不同风向角下线形布置双方柱脉动气动力特性研究[J]. 振动与冲击, 2021, 40(13): 159-166

YANG Qun1，2，3, WU Qianyun3, JIANG Huimin3, LIU Qingkuan1，2，3, LIU Xiaobing1，2，3. Fluctuating aerodynamic force characteristics of two square cylinders arranged inline under different wind direction angles[J]. Journal of Vibration and Shock, 2021, 40(13): 159-166

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