作为一种新型的功能材料，声带隙材料表现出许多独特的声学特性，在声谐振器、滤波器、波导、传感器、声学透镜以及减震降噪控制等方面具有广阔的应用前景。本申请项目采用物理的、力学的及其相结合的方法，对完整周期的和随机失谐的声带隙材料和结构的波动特性进行了系统深入的研究，发展或改进了若干有效的能带结构和带隙计算方法；设计制作了固体/液体声带隙材料和结构，并进行了浸水超声测试；对能带结构和带隙的特性、表面波和界面波、板中的Lamb波和弯曲波、缺陷态及其对波传播的控制、随机失谐导致的波局部化等基本特征进行了深入的理论和实验研究；探讨了声带隙材料高频波动等效问题；研究了力-电-磁多场耦合声带隙材料的波动特性。从理论、计算、实验三方面为声带隙材料走向应用奠定了基础。

As a kind of novel functional materials, band gap materials have many particular acoustic properties and thus are expected to be applied as acoustic harmonic resonantors, filters, waveguides, transducers, lens, vibration dampers and noice reducers, etc. The project conducted researches on the acoustic properties of band gap materials with perfect periodicity and with random disorder from view of physics and mechanics. Several effective approaches to calculate the band gap structures were developed or improved. The band gap materials and structures composed of solid-liquid components were designed. The underwater ultrasonic technique was developed. The band gap properties of bulk waves, surface、interface waves, Lamb/bending waves were analyzed. The manipulation of waves by introducing defects and its applications were discussed. The wave localization due to random disorder was studied. The dynamically equivalent continuum model of the band gap materials was explored. The research also concerns the properties of the piezo-magneto-mechanical band gap materials. The research is believed to be helpful in understanding the acoustic features of the materials and facilitating their applications.

作为一种新型的功能材料，声带隙材料表现出许多独特的声学特性，在声谐振器、滤波器、波导、传感器、声学透镜以及减震降噪控制等方面具有广阔的应用前景。本申请项目采用物理的、力学的及其相结合的方法，对完整周期的和随机失谐的声带隙材料和结构的波动特性进行了系统深入的研究，发展或改进了若干有效的能带结构和带隙计算方法；设计制作了固体/液体声带隙材料和结构，并进行了浸水超声测试；对能带结构和带隙的特性、表面波和界面波、板中的Lamb波和弯曲波、缺陷态及其对波传播的控制、随机失谐导致的波局部化等基本特征进行了深入的理论和实验研究；探讨了声带隙材料高频波动等效问题；研究了力-电-磁多场耦合声带隙材料的波动特性。从理论、计算、实验三方面为声带隙材料走向应用奠定了基础。