On underwater sound radiation in a towing tank induced by continuous machine vibration in a steel circular cylinder

IF 1.5 4区工程技术 Q3 MECHANICS

Journal of Mechanics Pub Date : 2021-10-04 DOI:10.1093/jom/ufab026

Wu C, Too G.

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引用次数: 0

Abstract

An understanding of the characteristics and mechanisms of structural vibrations produced by underwater vehicles is required to reduce sound radiation in submarine environments. In this study, experiments were performed using a continuously running machine to produce low-frequency vibrations in a submerged, watertight, steel circular cylinder in the centre of a 176 × 8 × 4 m³ towing tank, and the underwater radiation sound field was measured. Finite element method simulations of the system were also performed and showed good agreement with the experimental results. The wall effects of the towing tank were simulated in detail by changing the alternative impedances of the wall. The reflection and acoustic impedance of the towing tank walls were found to significantly affect the underwater sound field in both the experiments and simulations. An analytical solution was used to verify the frequency range applied in the simulation analysis. The results of this study provide a measurement procedure and a simulation method, which can be used to evaluate the underwater radiation sound field from the vehicle machine running in the water at wall boundary environment.

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钢圆柱体连续振动对拖曳箱水声辐射的影响

摘要为了减少水下环境中的声辐射，需要了解水下航行器产生的结构振动的特征和机理。在本研究中，使用连续运转的机器在176 × 8 × 4 m3拖曳水箱中央的水下水密钢圆柱中产生低频振动，并测量水下辐射声场。对系统进行了有限元仿真，结果与实验结果吻合较好。通过改变拖曳舱壁面的交替阻抗，详细模拟了拖曳舱壁面效应。实验和仿真结果均表明，拖曳舱壁的反射和声阻抗对水声场有显著影响。用解析解验证了仿真分析中所采用的频率范围。本文的研究结果提供了一种测量方法和仿真方法，可用于评估在墙边界环境下水中运行的车辆机器的水下辐射声场。

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

Journal of Mechanics 物理-力学

CiteScore

3.20

自引率

11.80%

发文量

审稿时长

6 months

期刊介绍： The objective of the Journal of Mechanics is to provide an international forum to foster exchange of ideas among mechanics communities in different parts of world. The Journal of Mechanics publishes original research in all fields of theoretical and applied mechanics. The Journal especially welcomes papers that are related to recent technological advances. The contributions, which may be analytical, experimental or numerical, should be of significance to the progress of mechanics. Papers which are merely illustrations of established principles and procedures will generally not be accepted. Reports that are of technical interest are published as short articles. Review articles are published only by invitation.