薄板结构气动导纳试验研究

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Lw 和薄板宽度B的关系

Experiment study on aerodynamic admittance function of thin plate

The 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.