A Design Method for Vibration and Acoustic Reduction of the Power System in an Underwater Automobile Glider

The International Journal of Acoustics and Vibration Pub Date : 2022-09-30 DOI:10.20855/ijav.2022.27.31865

Yujun Liu, Jing Liu, Guang-xu Pan, Liming Guo, Qiaogao Huang

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引用次数: 2

Abstract

Underwater automobile gliders (AUGs) are new underwater vehicles, that should have lightweight structures with low vibration and acoustic characteristics due to their working conditions. This paper proposes a design method for vibration and acoustic reduction of the power system in an AUG by using the stand-off layer perforated viscoelastic material (SOL-PVEM) damping treatment with lightweight characteristics. The finite element method is used to calculate the vibration characteristics and modal loss factors of the plates with different SOL-PVEM damping treatments. The influence of the perforation of the damping layer on the modal loss factor is investigated. Then, the structure and acoustic coupling of finite element models of the power system with the SOL-VEM and SOL-PVEM damping treatments are established. The vibration acceleration, sound power, and sound pressure directivity of the power system of the AUG coated with the two proposed damping treatments are analyzed respectively. The results show that the vibration and acoustic responses of the power system can be effectively reduced by using the proposed lightweight SOL-PVEM damping treatment.

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水下汽车滑翔机动力系统的减振降噪设计方法

水下汽车滑翔机(aug)是一种新型的水下航行器，其工作环境要求其结构轻、振动小、声学特性好。提出了一种采用具有轻量化特性的隔层穿孔粘弹性材料(SOL-PVEM)减振降噪设计方法。采用有限元法计算了不同SOL-PVEM阻尼处理下板的振动特性和模态损失因子。研究了阻尼层穿孔对模态损失因子的影响。然后，建立了采用SOL-VEM和SOL-PVEM阻尼处理的电力系统结构与声耦合有限元模型。分别分析了两种阻尼处理后的动力系统的振动加速度、声功率和声压指向性。结果表明，采用轻量化的SOL-PVEM阻尼处理可以有效地降低电力系统的振动和声响应。

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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The International Journal of Acoustics and Vibration

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