Experimental verification of ultra-broadband vibration reduction of underwater vehicle pressure-resisting shells using acoustic black holes

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-02-24 DOI:10.1016/j.tws.2025.113118

Nansha Gao, Zhicheng Zhang, Yiting Li, Guang Pan

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引用次数: 0

Abstract

The aim of this paper is to design acoustic black hole structures for underwater pressure-resistant shells (PRSs), including single- and double-leaf structures, which are applied to the inner and outer PRS surfaces. The mean square velocity and displacement modes on the shell surface indicate that surface vibrations above the cutoff frequency can be effectively attenuated. Three sets of experiments are designed, i.e., PRS under white noise point excitation and underwater vehicle motor under no-load and load conditions. The data acquired at key measuring points reveal that the vibration acceleration on the shell surface has a significant attenuation effect in most of the frequency bands from 0.001 to 25 kHz, with a maximum attenuation of up to two orders of magnitude. It is particularly effective in suppressing strong vibrations at the switching frequency of underwater vehicle motors. The paper conclusions of this study can be directly applied to vibration and noise reduction systems for underwater equipment. Moreover, they offer another insights for developing potential broadband vibration and noise reduction structures.

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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.