薄板结构气动导纳试验研究  

Experiment study on aerodynamic admittance function of thin plate

作　　者：蒋永林[1] 强士中[1] 廖海黎[1] 

机构地区：[1]西南交通大学桥梁及结构工程系,四川成都610031

出　　处：《流体力学实验与测量》2001年第4期26-29,52,共5页Experiments and Measurements in Fluid Mechanics

摘　　要：结构的气动导纳是决定结构上气动荷载的重要参数。常用的Sears’气动导纳函数只描述了导纳与频率的关系。设计了拉条模型试验验证结构的气动导纳不单与频率有关 ,还与结构的特征尺寸、风场的特征参数有关。获得的三维气动导纳公式定量描述了导纳与频率n、湍流积分尺度LwThe aerodynamic admittance function (AAF) of structures is an important parameter to decide the loads on the structure induced by turbulence. The generally used AAF, Sears' function, merely displays its dependence on frequency. A taut strip model experiment was performed to verify that the AAF dependent not only on the frequency, but also on the structure's dimension and characteristic size of the turbulence field. The AAF derived from the experiment shows quantitatively the relationship between AAF and frequency n , length scale L w and plate width B of the turbulence.

关 键 词：拉条模型 风洞实验 薄板结构 气动导纳函数 空气动力学 频率 湍流积分尺度 薄板宽度 

分 类 号：V211.7[航空宇航科学与技术—航空宇航推进理论与工程] U441[建筑科学—桥梁与隧道工程]