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,其中包括膜的附加空气质量的计算。首先采用格林函数法推导了封闭式膜结构的附加空气质量acm的表达式,得到了lmacr/关于膜尺度k的变化曲线,并讨论了各种影响lmacr/取值的因素;其次,利用薄型机翼理论推导了敞开式膜结构在非定常流中的附加空气质量0am的表达式,得到了lmar/0关于膜尺度H/l的变化曲线,并讨论了各种影响lmar/0取值的因素。研究结果为膜结构非线性耦合风振响应分析奠定了基础。
Wind-induced dynamic response of membrane structures is characterized by fluid-structure coupling interaction, which includes the calculation of the added air-mass on the membrane. Based on the characteristics of membrane structures, the expression of the added air-mass acm of the closed membrane structures is derived using the Green function method. The curve of nondimensional added air-mass lmacr/ corresponding to geometric scale k of the membrane is obtained and all factors influencing the value of the lmacr/ are discussed. Thin aerofoil theory is applied and the expression of the added air-mass 0am of the open membrane is deduced. The curve of nondimensional added air-mass lmar/0 with geometric scale H/l of the membrane is obtained and all factors influencing the value of lmar/0 are discussed. The present study lays down the foundation for the wind-induced nonlinear coupling dynamic analysis of the membrane structures.
出处
《工程力学》
EI
CSCD
北大核心
2004年第1期153-158,共6页
Engineering Mechanics
基金
国家自然科学基金(59978044)资助项目
关键词
膜结构
附加空气质量
格林函数
薄型机翼理论
流固耦合
membrane structures
added air-mass
green function
thin aerofoil theory
fluid-structure coupling
