轮辐板式局域共振声子晶体隔振器的振动特性研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (15) : 43-50.

论文

赵浩江1 ，宋扬2，刘荣强3

作者信息 +

Vibration Characteristics of Spoke-Like Vibration Isolator Based on Locally Resonant Phononic Crystal Plates

ZHAO Haojiang1 SONG Yang2 LIU Rongqiang3

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文章历史 +

摘要

基于局域共振带隙机理，设计一种新型的轮辐式三组元凸起声子晶体板隔振器，并结合理论带隙计算、有限元仿真和试验测试对隔振器的低频隔振特性进行分析和验证。研究发现，以轮辐形板为三组元凸起声子晶体板的基板比圆形板容易获得更大的带隙频率范围内衰减幅度。基板上开孔可以提高带隙的终止频率，从而增大带隙宽度。选用三种双侧凸起的原胞为轮辐板的基本单元，设计了三种单轮辐板隔振器，以及不同轮辐板排列组合的六种双轮辐板和六种三轮辐板隔振器。实测数据表明，单轮辐板、双轮辐板以及三轮辐板隔振器在其带隙频率范围内平均衰减幅度分别可以达到24dB、34dB以及38dB。这种结构设计及研究结果在低频减振领域有潜在的应用前景。

Abstract

A design of spoke-like vibration isolators composed of three-component phononic crystal plates is introduced based on the locally resonant mechanism of vibration band gaps. The low-frequency vibration characteristics of the proposed isolators are investigated through vibration gap calculation, finite element simulation and experiment. Results show that a spoke-like base plate is more effective to obtain vibration attenuation amplitudes in the gap frequency range than a rounded base plate. Periodic holes on the base plate of spoke-like pillared phononic crystal plate can enlarge the gap width by raising cutoff frequency of the vibration gap. Based on three spoke-like plates with different unit cells of double-side pillared plates, three isolators with one spoke-like plate, six isolators with two spoke-like plates and six isolators with three spoke-like plates are designed and investigated. Experimental results show that the average vibration attenuation amplitudes of the proposed spoke-like isolators with one, two and three spoke-like double-side pillared phononic crystal plates (DSPPCPs) can reach 24dB, 34dB and 38dB respectively. The structure design and investigation results provide potential applications prospect in the low-frequency vibration reduction.

导出引用

赵浩江1,宋扬2，刘荣强3. 轮辐板式局域共振声子晶体隔振器的振动特性研究[J]. 振动与冲击, 2017, 36(15): 43-50

ZHAO Haojiang1 SONG Yang2 LIU Rongqiang3. Vibration Characteristics of Spoke-Like Vibration Isolator Based on Locally Resonant Phononic Crystal Plates[J]. Journal of Vibration and Shock, 2017, 36(15): 43-50

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