Optimal design of phononic media through genetic algorithm-informed pre-stress for the control of antiplane wave propagation
Optimal design of phononic media through genetic algorithm-informed pre-stress for the control of antiplane wave propagation
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DOI：
10.1016/j.eml.2020.100896
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发表时间：
2020-10-01
影响因子：
4.7
通讯作者：
Parnell, William J.
中科院分区：
文献类型：
--
作者：
De Pascalis, Riccardo;Donateo, Teresa;Parnell, William J.
在本文中，我们采用遗传算法从理论上设计了一系列声子介质，这些介质可以防止或确保反平面弹性波在特定低频范围内传播，每种情况都对应于特定的预应力水平。所描述的介质由嵌入弹性基质内的圆柱形环阵列组成。环被认为能够承受大应变，其本构响应由流行的 Mooney-Rivlin 应变能函数描述。所描述的介质的简单性质是声子介质中拓扑优化的另一种方法，该方法虽然有用，但通常会在复合材料内产生复杂的相分布，从而导致更复杂的制造要求。 (C) 2020 作者。由爱思唯尔有限公司出版
In this paper we employ genetic algorithms in order to theoretically design a range of phononic media that can act to prevent or ensure antiplane elastic wave propagation over a specific range of low frequencies, with each case corresponding to a specific pre-stress level. The medium described consists of an array of cylindrical annuli embedded inside an elastic matrix. The annuli are considered as capable of large strain and their constitutive response is described by the popular Mooney-Rivlin strain energy function. The simple nature of the medium described is an alternative approach to topology optimization in phononic media, which although useful, often gives rise to complex phase distributions inside a composite material, leading to more complicated manufacturing requirements. (C) 2020 The Author(s). Published by Elsevier Ltd.