复合材料圆柱壳声目标强度数值分析

摘要

In order to study the acoustic scattering characteristics of composite cylindrical shell, the simulation analysis of underwater composite cylindrical shell under the condition of air backing was established to investigate layer angle, fiber layer and shell thickness ratio on the intensity of the acoustic target, which was based on the finite element method and combined with AML technology. Results show that the ply angle of cylindrical shell has great effect on the intensity of the acoustic target at low and intermediate frequency. The influence of the ply angle on the intensity of the acoustic target converges at high frequency. Fiber layer has little effect on the intensity of the acoustic target. Within a certain range, the smaller the shell thickness ratio, the smaller the intensity of the acoustic target.%为研究复合材料圆柱壳的声散射特性，本文基于有限元法，并结合AML技术，计算并分析水下空气背衬条件下复合材料圆柱壳铺层角度、纤维层数和壳厚比对复合材料圆柱壳声目标强度（ TS）的影响规律。结果表明：低中频时，圆柱壳铺层角度对TS影响较大；高频时，铺层角度对TS影响趋于一致；纤维层层数对TS影响不大；一定范围内，壳厚比越小，声目标强度值越小。