轮辐板式局域共振声子晶体隔振器的振动特性研究

发布时间：2018-03-20 21:16

  本文选题：声子晶体　切入点：局域共振　出处：《振动与冲击》2017年15期 　论文类型：期刊论文

【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24 dB、34 dB以及38 dB。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]:Based on the mechanism of local resonance band gap, a new type of three-component protruding phonon crystal plate isolator is designed, and the theoretical band gap is calculated. Finite element simulation and test are used to analyze and verify the low frequency vibration isolation characteristics of the vibration isolator. It is easier to obtain a larger attenuation amplitude in the band gap frequency range by using the spoke plate as the substrate of the three-component convex phonon crystal plate than the circular plate, and the opening in the substrate can increase the terminating frequency of the band gap. In order to increase the width of the band gap, three kinds of protruded protocells are selected as the basic unit of the spoke plate, and three kinds of single spoke plate isolators are designed. And six kinds of double spoke plates and six kinds of three-spoke plate isolators arranged and combined with different spoke plates. The measured data show that the single spoke plate, The average attenuation amplitude of dual-spoke plate and three-spoke plate isolator can reach 24 dB and 38 dB in the band gap frequency range, respectively. The structural design and research results have potential application prospect in the field of low frequency vibration absorption.
【作者单位】： 中国科学院长春光学精密机械与物理研究所;东北林业大学机电工程学院;哈尔滨工业大学机电工程学院;
【基金】：基金项目:“111”工程( B07018)
【分类号】：O735;TB535.1
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本文编号：1640835