局域共振型加筋板的弯曲波带隙与减振特性

发布时间：2018-06-10 12:48

本文选题：局域共振 + 加筋板　；参考：《物理学报》2016年17期

【摘要】：通过在加筋板结构上附加周期性排列的"弹簧-质量"共振子单元,构造了一种局域共振型加筋板结构.针对这种新型结构,基于有限元法和周期结构Bloch定理,建立了其弹性波传播与振动特性理论计算方法;采用该方法深入研究了局域共振型加筋板的弯曲波带隙特性和减振特性.研究表明,局域共振子能够对加筋板的弯曲波传播特性产生显著影响,一方面使其产生更加低频的带隙,另一方面还能拓宽其中高频带隙.进一步深入分析了共振子的弹簧刚度、共振子的质量对带隙特性和减振特性的影响,发现了有价值的带隙调控现象、规律和减振特性,可为局域共振型加筋板的带隙特性设计与工程减振应用提供理论指导和有益参考.
[Abstract]:A kind of locally resonant stiffened plate structure is constructed by adding a periodically arranged "spring-mass" resonance subelement to the stiffened plate structure. Based on the finite element method and Bloch theorem of periodic structure, the theoretical calculation method of elastic wave propagation and vibration characteristics is established, and the band-gap and vibration absorption characteristics of local resonance stiffened plates are studied. It is shown that the local resonator can significantly affect the bending wave propagation characteristics of stiffened plates. On the one hand, it can produce a lower band gap, on the other hand, it can widen the high frequency band gap. The spring stiffness of the resonator and the effect of the mass of the resonator on the band gap and vibration absorption characteristics are further analyzed. The valuable bandgap control phenomena, laws and vibration absorption characteristics are found. It can provide theoretical guidance and useful reference for the design of band gap characteristics of local resonance stiffened plates and the application of engineering vibration reduction.
【作者单位】：国防科学技术大学机电工程与自动化学院装备综合保障技术重点实验室;
【基金】：国家自然科学基金(批准号:51305448) 航空科学基金(批准号:2015ZA88003)资助的课题~~
【分类号】：O328

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