徐海巍, 余世策, 楼文娟. 开孔双空腔结构风致内压动力特性的研究[J]. 工程力学, 2013, 30(12): 154-159. DOI: 10.6052/j.issn.1000-4750.2012.08.0596
引用本文: 徐海巍, 余世策, 楼文娟. 开孔双空腔结构风致内压动力特性的研究[J]. 工程力学, 2013, 30(12): 154-159. DOI: 10.6052/j.issn.1000-4750.2012.08.0596
XU Hai-wei, YU Shi-ce, LOU Wen-juan. STUDY ON WIND INDUCED INTERNAL PRESSURE DYNAMIC CHARACTERISTIC FOR AN OPENING STRUCTURE WITH TWO COMPARTMENTS[J]. Engineering Mechanics, 2013, 30(12): 154-159. DOI: 10.6052/j.issn.1000-4750.2012.08.0596
Citation: XU Hai-wei, YU Shi-ce, LOU Wen-juan. STUDY ON WIND INDUCED INTERNAL PRESSURE DYNAMIC CHARACTERISTIC FOR AN OPENING STRUCTURE WITH TWO COMPARTMENTS[J]. Engineering Mechanics, 2013, 30(12): 154-159. DOI: 10.6052/j.issn.1000-4750.2012.08.0596

开孔双空腔结构风致内压动力特性的研究

STUDY ON WIND INDUCED INTERNAL PRESSURE DYNAMIC CHARACTERISTIC FOR AN OPENING STRUCTURE WITH TWO COMPARTMENTS

  • 摘要: 该文推导了开孔双空腔结构内压动力响应的方程组,得到了共振频率和等效阻尼比。对不同空腔开孔面积比和内部容积比下模型各空腔的内压动力响应进行了风洞试验。研究结果表明:两空腔结构模型进行风洞试验时空腔的内部容积,应按照原型和实验风速比平方的关系进行调整以准确模拟原型的内压脉动。含有外墙开孔的空腔(前腔)内压脉动均方根小于不含外墙开孔的空腔(后腔)。内外压均方根比会随着空腔开孔面积比的增加而增大。另外,空腔开孔面积比的增加还会导致系统共振频率升高,等效阻尼比降低。而空腔容积比的增加会使一阶共振频率升高,二阶共振频率降低,并趋向单一空腔时的Helmholtz频率。

     

    Abstract: Equations to describe the internal pressure dynamic response for an opening structure with two compartments were set up. Resonance frequency and equivalent damping ratio are also deduced. The wind tunnel investigation on the dynamic behavior of internal pressure was applied to a series of two-compartment models with different opening ratios and volume ratios between two compartments. Test results show how to correctly simulate wind induced internal pressure response in a two-compartment building, and that the internal volume of the test model should be adjusted by the square of full scale to the model velocity ratio in a wind tunnel test. Lower pressure root-mean-square (RMS) is observed in the compartment with an external opening (front compartment), relative to the one without an external opening (back compartment). The internal to external pressure RMS ratio grows as the increase of the compartment opening ratio and the increased opening ratio will also raise a resonance frequency but reduce an equivalent damping ratio. Although a bigger compartment volume ratio results in a higher first-order resonance frequency and a lower second-order resonance frequency, both of them are more close to the Helmholtz frequency of an opening structure without internal partitioning.

     

/

返回文章
返回