| 空气动力对薄膜结构动力特性的影响规律 |
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| 引用本文： | 李庆祥,孙炳楠.空气动力对薄膜结构动力特性的影响规律[J].空气动力学学报,2007,25(2):137-144. |
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| 作者姓名： | 李庆祥 孙炳楠 |
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| 作者单位： | 1. 广东省建筑科学研究院,广东,广州,510500
2. 浙江大学土木系,浙江,杭州,310027 |
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| 摘 要： | 薄膜结构刚度小、自重轻、自振频率低,对外力作用非常敏感,因此在分析其动力特性时应考虑到空气与结构的耦合作用。本文利用附加空气质量、辐射阻尼和气承刚度这一简化气动力模型来考虑空气与振动薄膜结构之间的相互作用。分别推导了附加空气质量、辐射阻尼和气承刚度的计算方法及其相应的变化规律。并进一步采用算例分析对结构在空气中的自由振动和受迫简谐振动进行了系统分析,同时探讨了气动力对薄膜结构动力特性的影响规律。
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| 关 键 词： | 薄膜结构 空气动力 动力特性 耦合作用 |
| 文章编号： | 0258-1825（2007）02-0137-08 |
| 修稿时间： | 2006-04-252006-08-09 |
Influence regularity of aerodynamic forces on dynamic characteristics of membrane structures |
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| LI Qing-xiang,SUN Bing-nan.Influence regularity of aerodynamic forces on dynamic characteristics of membrane structures[J].Acta Aerodynamica Sinica,2007,25(2):137-144. |
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| Authors: | LI Qing-xiang SUN Bing-nan |
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| Institution: | 1. GuangDong provincial Academy of Buiding Research, Guangzhou 510500, China ; 2. Department of Civil Engineering, Zhefiang University, Hangzhou 310027, China |
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| Abstract: | With small stiffness,light mass and low natural vibration frequency,membrane structures are sensitive to external force.So it needs to consider the air-structure coupling when we calculate the dynamic characteristics of membrane structures.This paper deals with the interaction between air and structure by means of a simplified aerodynamic force model,which is consisted of added air mass,radiation damping and pneumatic stiffness.Their calculation methods and corresponding variation regularity have been deduced respectively.And then,further investigations of the free and forced harmonic vibration considering membrane immerse in air.Meanwhile,the influence regularity of aerodynamic forces on membrane structures' dynamic characteristics has been studied in the paper. |
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| Keywords: | membrane structure aerodynamic force dynamic characteristics air-structure coupling |
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