开敞式索膜结构的气动失稳临界风速

魏德敏; 朱美玲; 李頔

doi:10.3879/j.issn.1000-0887.2011.03.002

开敞式索膜结构的气动失稳临界风速

doi: 10.3879/j.issn.1000-0887.2011.03.002

华南理工大学亚热带建筑科学国家重点实验室,广州 510640;2.华南理工大学土木工程系,广州 510640

基金项目: 广东省自然科学基金资助项目(020904)

详细信息

作者简介:
魏德敏(1955- ),女,四川资中人,教授,博士,博士生导师(联系人.Tel:+86-20-87113683;E-mail:dmwei@scut.edu.cn).

中图分类号: TU351
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出版历程
- 收稿日期: 2010-12-24
- 修回日期: 2011-01-14
- 刊出日期: 2011-03-15

Aerodynamic Unstable Critical Wind Velocity for Three-Dimensional Open Cable-Membrane Structures

State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, P. R. China;

摘要

摘要: 考虑几何非线性的影响，利用无限薄的旋涡薄层模拟气流在结构表面形成的扰动，由非稳态Bernoulli方程和环量定理将空气压力表示成旋涡密度的函数；然后由涡格法结合耦合边界条件求出旋涡密度，根据系统的稳定性判据得到结构发散失稳临界风速的解析表达式．通过三维开敞式膜结构的计算分析，发现空间膜结构的曲率是影响结构气动失稳临界风速的主要因素．
- 开敞式索膜结构 /
- 临界风速 /
- 涡格法
Abstract: The aerodynamic unstable critical wind velocity for three-dimensional open cable-membrane structures was investigated.The geometric nonlinearity was introduced into the dynamic equilibrium equations of structures.The disturbances on the structural surface caused by the air flow were simulated by a vortex layer with infinite thickness in the structures.The unsteady Bernoulli equation and the circulation theorem were applied in order to express the aerodynamic pressure as the function of the vortex density.Then,the vortex density was obtained by the vortex lattice method considering the coupling boundary condition.Through the numerical computation for the analytical expressions of the unstable critical wind velocities,some computational results and useful conclusions are obtained.It is found that the initial curvature of open cable-membrane structures has the evident influence on the critical wind velocities of the structures.
- open cable-membrane structure /
- critical wind velocity /
- vortex lattice method

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参考文献(9)

[1]	Sygulski R. Stability of membrane in low subsonic flow [J]. International Journal of Non-Linear Mechanics, 2007, 42（1）: 196-202. doi: 10.1016/j.ijnonlinmec.2006.11.012
[2]	Miyake A, Yoshimura T, Makino M. Aerodynamic instability of suspended roof modals[J]. Journal of Wind Engineering and Industrial Aerodynamics, 1992, 42（1/3）: 1471-1482. doi: 10.1016/0167-6105(92)90154-3
[3]	杨庆山, 刘瑞霞. 薄膜结构气弹动力稳定性研究[J]. 工程力学, 2006, 23(9): 18-24.(YANG Qing-shan，LIU Rui-xia. On aerodynamic stability of membrane structures[J]. Engineering Mechanics, 2006, 23(9): 18-24.(in Chinese))
[4]	李庆祥, 孙炳楠. 均匀流场中小曲率薄膜的气动稳定性分析[J]. 工程力学, 2006, 23(4): 39-44.(LI Qing-xiang，SUN Bing-nan. Aerodynamic stability analysis of small curved membrane in uniform flow[J].Engineering Mechanics, 2006, 23(4): 39-44.(in Chinese))
[5]	李庆祥，孙炳楠. 封闭薄膜屋盖的风致动力失稳分析[J]. 振动工程学报, 2006, 19(3): 346-353.(LI Qing-xiang, SUN Bing-nan. Wind-induced aerodynamic instability for closed membrane roofs[J]. Journal of Vibration Engineering, 2006, 19(3): 346-353.(in Chinese))
[6]	Bisplinghoff R L, Ashley H. Principles of Aeroelasticity[M]. New York: John Wiley, 1962.
[7]	H W 伏欣. 气动弹性力学原理[M]. 沈克扬译，管德校. 上海: 上海科学技术文献出版社, 1974.(Frsching H W. Grundlagen der Aeroelastik[M]. Berlin, Heidelberg, New York: Springer-Verlag, 1974.)
[8]	沈世钊, 徐崇宝, 赵臣, 武岳. 悬索结构设计[M]. 北京: 中国建筑工业出版社, 2006.(SHEN Shi-zhao, XU Chong-bao, ZHAO Chen, WU Yue. Design of Cable Structures[M].Beijing: China Architecture & Building Press, 2006.(in Chinese))
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开敞式索膜结构的气动失稳临界风速

doi: 10.3879/j.issn.1000-0887.2011.03.002

作者简介:
魏德敏(1955- ),女,四川资中人,教授,博士,博士生导师(联系人.Tel:+86-20-87113683;E-mail:dmwei@scut.edu.cn).

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Aerodynamic Unstable Critical Wind Velocity for Three-Dimensional Open Cable-Membrane Structures

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开敞式索膜结构的气动失稳临界风速

doi: 10.3879/j.issn.1000-0887.2011.03.002

作者简介: 魏德敏(1955- ),女,四川资中人,教授,博士,博士生导师(联系人.Tel:+86-20-87113683;E-mail:dmwei@scut.edu.cn).

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Aerodynamic Unstable Critical Wind Velocity for Three-Dimensional Open Cable-Membrane Structures

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出版历程

目录

作者简介:
魏德敏(1955- ),女,四川资中人,教授,博士,博士生导师(联系人.Tel:+86-20-87113683;E-mail:dmwei@scut.edu.cn).