水介质中复合材料壳板结构的声学设计

The Acoustics Design on the Underwater Composite Shell Structure

将复合材料壳板代替钢质壳板,建立了复合材料壳板结构的水中声学计算模型。从水声波动学方程出发,推导了不同终端边界条件下的传递矩阵、声反射系数和吸声系数,并通过试验研究证明了运用传递矩阵法进行声学设计的可靠性;考虑表层阻抗,吸声层厚度、损耗因子,及水层厚度的影响,应用数值方法对水中复合材料壳板结构进行了声学设计,分析了各参数对结构反射系数和吸声系数的影响规律。

By using acoustic stealth composite shell, the acoustic analysis model of underwater composite shell was built. The corresponding transition matrixes, reflection coefficient and absorption coefficient were deduced from the acoustic wave equation in different terminal condition. The results of transition matrix method were matched to the experimental data. The effect of acoustic stealth of composite shell on the impedance of surface layer, the thickness and loss factors of absorption layer, and the thickness of water were calculated. The structure of underwater composite shell was designed, and the reflection coefficient and absorption coefficient response were analyzed by numerical method.