层合复合材料的多层界面能够引起声波的多次反射 ,而且其内部夹层具有拉伸、压缩、剪切多种变形形式 ,可以更多的消耗声能 ,因此层合复合材料能有效地阻隔声波的通过。用有限元素法对一种层合复合材料进行声学有限元分析 ,得到与实验数据较为吻合的结果 ,实验结果和有限元分析结果都说明了夹层复合材料具有良好的隔声性能 Laminated composite multi-layer interface can cause multiple reflections of sound waves, and its internal sandwich has a variety of tensile, compression, shear deformation, which can consume more acoustic energy, laminated composite material can effectively block The passage of sound waves. Acoustic finite element analysis of a laminated composite with finite element method shows that it is in good agreement with the experimental data. The experimental results and finite element analysis show that the sandwich composite has good sound insulation performance