膜结构风振响应计算中的流固耦合因素研究  

Analysis of the Fluid-Structure Coupling Factors for Wind-Induced Dynamic Response of Membrane Structures

作　　者：毛国栋[1] 孙炳楠[1] 楼文娟[1] 倪志军[1] 

机构地区：[1]浙江大学建筑工程学院土木系,杭州310027

出　　处：《振动工程学报》2004年第2期228-232,共5页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目 (编号 :5 99780 4 4 )

摘　　要：膜结构的非线性风振响应是流固耦合的共同作用问题 ,其中包括耦合因素——附加空气质量与气承刚度的计算。采用格林函数法推导了平坦封闭式膜结构的附加空气质量 mac的表达式 ,得到了 mac/ (ρpl)关于膜尺度 k的变化曲线 ,并讨论了各种影响 mac/ (ρl)取值的因素 ;利用薄型机翼理论推导了平坦敞开式薄膜结构在非定常流中的附加空气质量 mao的表达式 ,得到了 mao/ (ρl)关于膜尺度 H/ l的变化曲线 ,并讨论了各种影响 mao/ (ρl)取值的因素。同时 ,针对封闭式薄膜结构 。Wind-Induced dynamic response of the membrane structures belongs to fluid-structure coupling interaction, which includes coupling factors-added air-mass and pneumatic stiffness. Applying Green function method, the expression of added air-mass mac of the closed membrane structures are deduced. The curve of nondimensional added air-mass mac/ρl corresponding to geometric scale k of the membrane is obtained and all factors influencing the value of the mac/ρl are discussed. Then thin aerofoil theory is applied and the expression of added air-mass mao of the open membrane is deduced. The curve of nondimensional added air-mass mao/ρl with geometric scale H/l of the membrane is obtained and all the factors influencing the value of mao/ρl are discussed. Then the pneumatic stiffness matrix of the closed membrane structures are deduced by virtual work principle.

关 键 词：膜结构 风振响应 计算 流固耦合 气承刚度 

分 类 号：TU311.3[建筑科学—结构工程]