夹芯复合材料在潜艇声隐身结构中的应用及其相关技术研究

潜艇的声隐身问题一直是研究的热点，各种新的声学材料和结构不断涌现。首先对复合材料在潜艇声隐身结构中的应用情况进行了分析，对其材料、结构形式、作用效果等方面进行了详细阐述，提出了夹芯吸声复合材料作为水下声隐身结构的发展趋势。然后利用数值计算的方法，对夹芯复合材料的声学性能进行了分析，得到了夹芯复合材料各层材料参数，如厚度、声特性阻抗和损耗等对声学性能的影响规律。最后，评估了典型局部结构壳板应用夹芯复合材料后的力学性能和声隐身性能。结果表明，潜艇非耐压结构的壳板采用夹芯复合材料可以满足结构的力学要求，与钢结构相比声隐身能力得到提高。

Laminated Compound Material and Technologies in the Development of Acoustic Stealth Structure in Submarine

The sound stealth for submarine is always a hot spot in research field. Many new sound absorbing materials and structures for this purpose come into use. An analysis of the compound materials applied to the acoustic stealth structure of submarine,especially fiber reinforced plastics in acoustic stealth structure design relating to the material, structure form and sound absorption effect is highlighted. The development trend that sandwich composites used as sound absorbing materials in the submarine structure design is brought forward. By calculating sound reflection and transmission coefficients with variation of the parameters of sandwich layers, the effect of these parameters, such as thickness, sound impedance and sound dissipation, on acoustic properties of sandwich composites is analyzed. The mechanical and acoustic properties of typical and partial structure shell with sandwich composites application are evaluated. The results show that the sandwich composites, applied to replace steel in submarine non-pressure hull ,can fulfill the needed strength and rigidity, and its property of acoustic stealth is greatly improved.