周期弹簧振子结构的局域共振带隙和布拉格带隙特征研究

发布时间：2018-04-19 11:06

本文选题：周期结构 + Bragg带隙　；参考：《船舶工程》2017年05期

【摘要】：设计一种周期单元由一个弹簧振子与多个吸振器并联而成的周期弹簧振子结构,该结构可以同时实现低频段的局域共振(LR)带隙和高频段的Bragg带隙。建立周期弹簧振子结构的动力学模型,推导波在周期单元中传播的特征方程,详细分析结构参数对振动带隙边界频率的影响,研究周期结构的振动衰减性能。研究结果表明,周期弹簧振子在低频和高频均具有振动带隙特征,可以应用于结构的减振设计。
[Abstract]:A periodic spring oscillator structure is designed, which consists of a spring oscillator and several vibration absorbers. The structure can realize the local resonance band gap in low frequency band and the Bragg band gap in high frequency band at the same time.The dynamic model of periodic spring oscillator structure is established, the characteristic equation of wave propagation in periodic element is derived, the influence of structural parameters on the frequency of vibration band-gap boundary is analyzed in detail, and the vibration attenuation performance of periodic structure is studied.The results show that the periodic spring oscillator has the characteristics of vibration band gap at low frequency and high frequency, so it can be applied to the design of vibration absorption of structure.
【作者单位】：中国船舶工业系统工程研究院;上海船舶设备研究所;
【分类号】：TB535.1

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