周期性加筋板中的波传播特性

THE CHARACTERISTICS OF WAVE PROPAGATION IN A PERIODIC ORIHOGONALLY STIFFENED FLAT PLATE

本文利用周期性结构的交互变分原理分析加筋板的波传播特性。并引进升阶谱有限元以提高计算精度，验证了该方法在高频区域的有效性。最后，分析了加筋板的长宽比，加筋状态及边界条件对结构波传播的影响。

The characteristics of wave propagation in a periodic plate reinforced byregular orthogonal stiffeners are analyzed using the mutual variational principle. The hi-erarchical finite element method is used to set up the matrix eigen-equation governing thewave propagation problem. The numerical results show that this method can guarantee agood accuracy even in high frequency field.Finally,the effect of the ratio of length to width.the paramaters of the stiffeners and the boyndary conditions are discussed.