多层复合材料的声学性能研究

材料分层复合是一种利用较少代价提高声学性能的有效方式,通过多孔性保温绝热材料与硬质黏弹性材料的优化组合,可以兼有隔声、吸声、阻燃和隔热等多项功能,同时符合相关环保要求。本文利用VAONE软件中NOVA模块研究了多种不同厚度分层材料的声学性能,并结合实验结果分析了主要参数对多层复合材料声学性能的影响。研究结果验证了NOVA模块预测多层材料声学性能的有效性,同时也表明多层材料经过优化设计可以具备良好的隔声性能。

AN INVESTIGATION ON ACOUSTICAL PERFORMANCE OF MULTILAYER COMPOSITE MATERIALS

The utilization of layered composite material is an effective way to improve the acoustical performance of a structure at relative low cost.Through the optimization of the porous thermal insulation material and the hard viscoelastic material,the resulting layered composite material can have many features such as sound insulation,sound absorption,fireproofing,heat insulation as well as other properties which meet environmental protection requirements.In this paper,the NOVA module in the VA ONE software is used to study the acoustical properties of a variety layered materials with different thickness,and their main influences on the acoustical parameters of multilayer materials via theoretical simulation and experimental testing.The results show that NOVA module can effectively predict acoustical properties of multilayer composite materials.The multilayer composite materials are shown to have a good sound absorption and sound insulation performance through the optimization design.