基于多层S型局域振子的声子晶体双层梁结构带隙特性研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (2) : 197-204.

论文

沈超明1，黄杰1，陈墨林1，钱登辉1，王建春2，庄家威1

作者信息 +

Band gap characteristics analysis of a phononic crystal double-layer beam structure based on multi-layer S-type local oscillator

SHEN Chaoming1,HUANG Jie1,CHEN Molin1,QIAN Denghui1,WANG Jianchun2,ZHUANG Jiawei1

Author information +

文章历史 +

摘要

针对工程中的振动噪声控制问题，提出了一种声子晶体梁结构，基于周期结构的Bloch定理，采用有限元法计算了该结构能带结构、特征模态所对应的位移场以及相应有限周期声子晶体梁结构的振动传输曲线，对其展现出的带隙特性进行了研究。由局域共振带隙形成主要机理，研究了低频段振动噪声控制的声子晶体梁结构，可应用于工程中特定频率的减振降噪问题。并对比分析了声子晶体单层梁结构和声子晶体双层梁结构的带隙特性，研究了单/双层梁结构振动的通性。研究了各参数对声子晶体梁结构带隙衰减频段的影响规律，通过合理设计参数，可以实现结构特定范围的低频隔振，在船舶、大型发电机组及其他工程的振动噪声领域中具有很好的应用前景。

Abstract

To suppress the propagation of vibration and noise in engineering, a kind of phononic crystal beam structure was designed. Based on the Bloch theorem of periodic structure, the band structures,displacement fields of eigenmodes and transmission power spectrums of the corresponding finite periodic phononic crystal beam structure are calculated by a finite element method. And the band gap characteristics of its display is studied. Based on the main mechanism of local resonant band gap formation, the phononic crystal beam structure of low frequency vibration and noise control is studied, which can be applied to the vibration and noise reduction of specific frequency in engineering. The band gap characteristics of phononic crystal veneer beam and phononic crystal double-layer beam are analyzed, and the commonness of phononic crystal single/double layer beam is studied. The influence of various parameters on the band gap attenuation band of phononic crystal beam structure is studied, and the low frequency vibration isolation in a specific range can be realized through reasonable design of parameters, which has a good application prospect in the field of vibration and noise of ships and other engineering.

导出引用

沈超明1，黄杰1，陈墨林1，钱登辉1，王建春2，庄家威1. 基于多层S型局域振子的声子晶体双层梁结构带隙特性研究[J]. 振动与冲击, 2023, 42(2): 197-204

SHEN Chaoming1,HUANG Jie1,CHEN Molin1,QIAN Denghui1,WANG Jianchun2,ZHUANG Jiawei1. Band gap characteristics analysis of a phononic crystal double-layer beam structure based on multi-layer S-type local oscillator[J]. Journal of Vibration and Shock, 2023, 42(2): 197-204

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