复合层合矩形板水下声辐射解析计算

基于一阶剪切形变理论(FSDT),建立四边简支矩形复合层合板水下声辐射解析模型,采用一种基于定积分的方法计算板表面流载声压,以提高辐射声阻抗的运算效率。为验证算法的正确性,将所得结果与数值计算方法进行了对比。1阶剪切形变理论计算结果也与经典层合板理论(CLPT)的计算结果进行了比较,指出其在计算复合层合板声辐射时的优势。最后分析了跨厚比,铺层角度等参数对声辐射的影响,为结构噪声控制提供参考。

Analytical Calculation of Sound Radiation for Underwater Laminated Composite Rectangular Plates

Based on the First Order Shear Deformation Theory （FSDT）, the analytical model for underwater soundradiation calculation of a simply supported laminated composite plate is built. A definite integral method is adopted toestimate the surface fluid-loaded sound pressure of the plate. This method can raise the effect for sound radiation impedanceestimation. The accuracy of the proposed model is validated by comparing the result of this method with that of numericalmethod. The result of this method is also compared with that based on the classical laminated plate theory （CLPT）. It isshown that this method has the superiority in calculation of the sound radiation field of composite laminated plates. Finally,the effects of ply’s orientation angle and width-to-depth ratio on the sound radiation are analyzed for structural noise control.