气柱共振对开洞结构内压风洞试验的影响

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (4) : 55-59.

论文

气柱共振对开洞结构内压风洞试验的影响

余先锋 1，2，谢壮宁 2?，刘海明 1，张承 3，王旭 1，董锐 1

作者信息 +

Effect of gas resonance on wind tunnel experiment for internal pressure in a building with a dominant opening

YU Xian-feng1,2 XIE Zhuang-ning2 LIU Hai-ming1 ZHANG Cheng3 WANG Xu1 DONG Rui1

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文章历史 +

摘要

气柱共振对开洞结构内压风洞试验的影响不容忽视，尤其是连通的两空间或多空间结构。文中首先阐述了内压风洞试验相似律及体积补偿要求，即按原型与实验风速比的平方进行内部体积补偿，且体积补偿箱须遵守“深且窄”的原则。然后，从往复压缩机管道系统引入了内压模型腔体的气柱共振频率计算公式。最后对两种补偿体积的开洞两空间结构进行内压风洞试验，试验结果证实了当体积补偿箱过于深长时，会出现气柱共振现象从而影响内压测量的精度。

Abstract

The effect of gas resonance on wind tunnel experiment for internal pressure in a building, especially in a two-compartment or multi-compartment building, with a dominant opening cannot be omitted. Similarity and additional internal volume requirements for internal pressure experiment are firstly described. The building internal cavity volume used at model-scale should be distorted by a factor equaling the square of the ratio of the full-scale to model-scale velocities, and the additional internal volume must be a deep and narrow cavity. Then, the gas natural frequency equation is introduced from reciprocating compressor piping system into wind tunnel studies on internal pressure. Finally, wind tunnel experiments on internal pressure for a two-compartment building with two kinds of additional distorted volumes are carried out. Results show that the measured internal pressure response will be inaccurate because of the influence of gas resonance when the additional distorted volumes are much deeper and narrower.

导出引用

余先锋 1，2，谢壮宁 2?，刘海明 1，张承 3，王旭1，董锐 1. 气柱共振对开洞结构内压风洞试验的影响[J]. 振动与冲击, 2018, 37(4): 55-59

YU Xian-feng1,2 XIE Zhuang-ning2 LIU Hai-ming1 ZHANG Cheng3 WANG Xu1 DONG Rui1. Effect of gas resonance on wind tunnel experiment for internal pressure in a building with a dominant opening[J]. Journal of Vibration and Shock, 2018, 37(4): 55-59

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