Wind-induced responses of a tall chimney by aeroelastic wind tunnel test using a continuous model
Wind-induced responses of a tall chimney by aeroelastic wind tunnel test using a continuous model
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使用连续模型进行气动弹性风洞试验的高烟囱风致响应
DOI：
10.1016/j.engstruct.2018.09.015
复制
发表时间：
2018-12
影响因子：
5.5
通讯作者：
Gang Hu
中科院分区：
文献类型：
--
作者：
Shuguo Liang;Wei Yang;Jie Song;Lei Wang;Gang Hu
本研究旨在通过气动弹性模型的风洞试验来研究 300m 高烟囱的风致响应。由于风洞中的烟囱模型模拟高达1×108的高雷诺数风流是不现实的，因此在模型表面贴上粗糙纸条，人为地实现全尺寸条件下的有效高雷诺数流动。通过对烟囱刚性模型进行一系列压力测量测试来确定粗糙度纸条的最佳厚度。为了检查烟囱的风引起的响应，使用 DEVCON 塑钢液制造了连续气动弹性烟囱模型。用最佳厚度的纸条对气动弹性模型进行粗糙化后，对模型进行了一系列风洞试验，以直接获取三种不同迎面风流条件下的结构响应。结果表明，粗糙化模型的响应远小于没有粗糙度元素的模型的响应，表明忽略雷诺数效应会高估响应。当折减风速V大于4时，烟囱的横风向加速度响应比顺风向更为显着。此外，虽然在均匀流中锁定现象更为明显，但在风流较湍流时，横风向加速度响应通常较大。
This study aims to investigate wind-induced responses of a 300 m high chimney by using wind tunnel tests on an aeroelastic model. Due to the fact that it is unrealistic to simulate wind flow with a high Reynolds number as high as 1 × 108for a chimney model in a wind tunnel, roughness paper strips were attached to the model surface to artificially achieve effective high Reynolds number flow in the full-scale condition. An optimal thickness of the roughness paper strips was determined via a series of pressure measurement tests on a rigid model of the chimney. To examine wind-induced responses of the chimney, a continuous aeroelastic chimney model was manufactured with the DEVCON plastic steel liquid. After roughening the aeroelastic model by the paper strips with the optimal thickness, a series of wind tunnel tests were conducted on the model to directly acquire the structural responses, for three different oncoming wind flow conditions. Results show that the response of the roughened model is much smaller than that for the model without roughness element, indicating that ignoring the Reynolds number effect will overestimate the response. The across-wind acceleration response of the chimney is more considerable than that in the along-wind direction, when the reduced wind velocityVris larger than 4. In addition, the across-wind acceleration response is usually larger in the more turbulent wind flow, although the lock-in phenomenon is more evident in uniform flow.
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DOI：
10.1016/j.jweia.2015.06.005
发表时间：
2015-10
影响因子：
4.8
作者：
S. Arunachalam;N. Lakshmanan
通讯作者：
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DOI：
10.1115/1.3240751
发表时间：
1980-12
期刊：
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影响因子：
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作者：
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DOI：
10.1016/s0167-6105(97)00024-x
发表时间：
1996-12
影响因子：
4.8
作者：
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通讯作者：
R. Ciesielski;A. Flaga;J. Kawecki
DOI：
10.1016/0167-6105(75)90019-7
发表时间：
1975
影响因子：
4.8
作者：
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