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首页> 外文期刊>Japanese journal of applied physics >Optimization scheme of geometric parameters for a 2D locally resonant phononic crystal structure
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Optimization scheme of geometric parameters for a 2D locally resonant phononic crystal structure

机译:二维局部共振声子晶体结构的几何参数优化方案

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摘要

A ring locally resonant phononic crystal with an effective optimization scheme is proposed. In order to obtain low-frequency broadband properties, three loops of 2-factor (the two key geometric parameters, i.e., the thickness of elastic beam and the radius of scatterer) and 7-level numerical experiments are designed to perform the response surface methodology (RSM) analysis. The low-frequency band gaps (BGs) of the present structures are calculated using finite element method to obtain enough simulation data for RSM analysis. After calculations, the two relationships can be obtained, i.e., the relationship of the starting frequency of the first BG and the two factors; and the relationship of the total bandwidth of the first two BGs and the two factors. Aiming at the lower starting frequency of the first BG and the wider total bandwidth of the first two BGs, the two key geometric parameters are optimized using interior point method. (C) 2019 The Japan Society of Applied Physics
机译:提出了一种具有有效优化方案的环形局部谐振声子晶体。为了获得低频宽带特性,设计了两个因子的三个回路(两个关键的几何参数,即弹性梁的厚度和散射体的半径)和七级数值实验,以执行响应面方法(RSM)分析。使用有限元方法计算本结构的低频带隙(BG),以获得足够的仿真数据用于RSM分析。经过计算,可以得到两个关系,即第一BG的起始频率和两个因素的关系。以及前两个BG的总带宽与两个因素的关系。针对第一个BG的较低启动频率和前两个BG的较宽的总带宽,使用内点法优化了两个关键几何参数。 (C)2019日本应用物理学会

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