CVAE-based inverse design of two-dimensional honeycomb pentamode metastructure for acoustic cloaking

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-10-24 DOI:10.1016/j.tws.2024.112623

Gen Li, Lihua Tang, Vladislav Sorokin, Shaohua Wang

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引用次数: 0

Abstract

In this work, a method for inverse design of two-dimensional honeycomb pentamode metastructures (HPM) based on the Conditional Variational Auto-Encoder (CVAE) is proposed to achieve acoustic cloaking. The parameter distribution of the perfect acoustic cloak with two-dimensional cylindrical Kohn-Shen-Vogelius-Weinstein (KSVW) mapping is first derived. The CVAE model framework is then established along with its loss function in terms of the design parameters of the HPM. The inverse design performance of the deep generative model is evaluated using a large number of random test samples based on finite element simulations, showing that the equivalent mechanical parameters obtained from inverse design are highly consistent with the target parameters of the perfect acoustic cloak. For the HPM cloak design given by the trained deep generative model, the total scattering cross section (TSCS) is significantly reduced as compared to the case without a cloak, thereby demonstrating the effectiveness of the CVAE-based inverse design of acoustic cloak.

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基于 CVAE 的用于声隐形的二维蜂巢五模元结构反设计

本文提出了一种基于条件变异自动编码器（CVAE）的二维蜂窝五模隐身结构（HPM）反向设计方法，以实现声隐身。首先推导了具有二维圆柱 Kohn-Shen-Vogelius-Weinstein (KSVW) 映射的完美声隐形的参数分布。然后，根据 HPM 的设计参数建立了 CVAE 模型框架及其损失函数。在有限元模拟的基础上，使用大量随机测试样本对深度生成模型的反设计性能进行了评估，结果表明反设计获得的等效机械参数与完美声学隐形衣的目标参数高度一致。对于训练有素的深度生成模型给出的 HPM 斗篷设计，与没有斗篷的情况相比，总散射截面（TSCS）显著减小，从而证明了基于 CVAE 的声学斗篷反设计的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.