论文标题
使用离散元素方法对粒状语音晶体结构进行仿真引导的优化
Simulation-Guided Optimization of Granular Phononic Crystal Structure Using the Discrete Element Method
论文作者
论文摘要
本文描述了一种设计用于声波操纵的颗粒语音晶体的新方法。一种离散的元素方法用于模拟脉冲波的动力学，该脉冲波通过具有嵌入式语音晶体的弹性球形颗粒的密集包装组件进行建模 - 该区域由具有不同密度的颗粒的某些颗粒排列组成。我们提出了一种优化策略，极大地将颗粒状语音晶体的有用特性实在，该特性是根据基于频谱频谱能量密度的频率 - 波 - 噪声功能来描述的。很少发现有效的音调晶体。建议的方法对于多种应用来说是感兴趣的，特别是对于地震屏蔽和选择性的吸收。
The paper describes a novel methodology of designing granular phononic crystals for acoustic wave manipulations. A discrete element method is utilized to model the dynamics of a pulse wave propagating through the densely packed assembly of elastic spherical particles with an embedded phononic crystal - the region consisting of a certain arrangement of particles with varying densities. We suggest an optimization strategy that extremizes the useful properties of a granular phononic crystal, which are described in terms of a noise-proof functional based on frequency-wavenumber summation of spectral energy density. Few types of efficient phononic crystals are identified. The suggested methodology is of interest for a number of applications, in particular, for seismic shielding and selective sound absorption.
