【摘要】 建立了局域共振声子晶体板状结构,在266.1~528.8 Hz频率范围内获得了最大幅值为35 dB的减振特性。对不同布置形式的声子晶体板进行了仿真和试验分析,二者结论基本一致。构建了局域共振声子晶体结构空腔,并结合有限元方法对空腔结构进行模态分析、带隙机理和共振带隙特性分析。得出声子晶体单元的不同布置位置和形式对声子晶体结构空腔的振动固有频率的影响。更多还原

【Abstract】 The locally resonant phononic crystal plate structure is established. The maximum amplitude of vibration characteristics of 35 dB is obtained in the frequency range of 266. 1 ~ 528. 8 Hz. The simulation and experimental analysis are implemented on phononic crystal plate of different arrangement and the conclusions are almost the same. A cavity of locally resonant phononic crystal structure is built. Combined with the finite element method,modal analysis,band gap characteristics,and resonance mechanism of cavity structure are finished. The conclusions can be drawn that the frequency of the crystal structure cavity is changed when the phononic cell structure arranged in different way and different position.更多还原