180m高三管集束式钢烟囱风荷载特性风洞试验研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (3) : 254-262.

论文

王晓海，柯世堂，余文林，杜琳

作者信息 +

Wind tunnel tests for wind load characteristics of 180 m-high 3-tube cluster steel chimney

WANG Xiaohai, KE Shitang, YU Wenlin, DU Lin

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文章历史 +

摘要

为系统研究180m三管集束式钢烟囱风荷载分布模式和时变特性，以国内某在建180m高三管集束式钢烟囱为研究对象，首先通过同步刚体测压风洞试验，得到了不同风向角下三管集束式钢烟囱各排烟筒表面平均与脉动风荷载。在此基础上，对比分析了典型风向角下三个排烟筒表面平均风压、脉动风压、升/阻力系数和整体平均体型系数的分布规律，并探讨了风压信号的高斯和非高斯分布及时变特性，归纳了信号在时间和空间上的相关性，总结了风向角和干扰效应对三管集束式烟囱体系气动力分布的影响规律。研究发现：三管集束式烟囱体系风荷载干扰效应主要表现为遮挡效应，整体体型系数最大值为0.71。在0°、90°和180°风向角下，风压信号分别有59.9%、53.4%和56.9%表现出大偏斜和高峰态分布特征。主要研究结论可为多管集束式钢烟囱的风荷载取值提供科学依据。

Abstract

Here, to systematically study wind load distribution mode and time-varying characteristics of a 180 m-high 3-tube cluster steel chimney, a certain 180 m-high 3-tube cluster steel chimney under construction in our country was taken as the study object. Firstly, through wind tunnel tests of synchronous rigid body pressure measurement, average and fluctuating wind loads on surface of each exhaust pipe of the 3-tube cluster steel chimney under different wind direction angles were obtained. On this basis, distribution laws of mean wind pressure, fluctuating wind pressure, lift coefficient, drag coefficient and overall average shape coefficient on surface of 3 exhaust pipes of the 3-tube cluster steel chimney under typical wind direction angle were contrastively analyzed. Gauss and non-Gauss distributions and time-varying characteristics of wind pressure signals were discussed, correlations of wind pressure signals in time domain and space domain were concluded, and influence laws of wind direction angle and inference effect on aerodynamic force distribution of the 3-tube cluster chimney system were summarized. The study showed that the interference effect of wind load on the 3-tube cluster chimney system mainly is shielding effect, and the maximum overall shape coefficient is 0.71; under wind direction angles of 0°, 90° and 180°, 59.9%, 53.4% and 56.9% of wind pressure signals reveal characteristics of large deflection and high-peak distribution; the main study conclusions can provide a scientific basis for wind load values of multi-tube cluster steel chimney.

导出引用

王晓海，柯世堂，余文林，杜琳. 180m高三管集束式钢烟囱风荷载特性风洞试验研究[J]. 振动与冲击, 2021, 40(3): 254-262

WANG Xiaohai, KE Shitang, YU Wenlin, DU Lin. Wind tunnel tests for wind load characteristics of 180 m-high 3-tube cluster steel chimney[J]. Journal of Vibration and Shock, 2021, 40(3): 254-262

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