基于声子晶体的二维减振结构设计

将局域共振声子晶体引入减振结构设计中，提出在橡胶减振材料中植入声子晶体的新型减振结构设计。通过有限元法计算位移频响曲线，研究了该结构的减振特性，并在此基础上进一步研究了周期层数、元胞尺寸、基体边长、中间层厚度及散射体尺寸对减振频段的调控作用。研究结果表明，该新型减振结构可以在280～1 000 Hz频段产生优良的减振效果，而各结构参数对禁带范围和频带宽度都具有很好的调控作用，使得针对特定频段的减振设计成为可能。该研究为航空航天领域新型减振器的设计提供了新的思路。

Two dimensional Vibration Reduction Structure Design Based on Phononic Crystals

In this paper, the local resonant phononic crystal is introduced into the design of vibration reduction structure, and a new structure is designed by embedding the phononic crystal into the rubber vibration reduction material. The vibration reduction characteristics of the vibration reduction structure are investigated with the finite element method and the structural parameters such as the periodic number, the cell size, the matrix length, the thickness of the intermediate layer and the scatterer size are also studied for their effect on the vibration reduction feature. The results show that the new vibration reduction structure can yield excellent shock absorption effect at the frequency range of 280～1 000 Hz. The structural parameters can modulate the vibration reduction frequencies in a large range, which makes it possible to design the vibration reduction structure for a specific frequency band.