基于声学有限元的喷水推进器流道声传播特性研究

doi:10.19423/j.cnki.31-1561/u.2023.06.050

船舶 ›› 2023, Vol. 34 ›› Issue (06): 50-55.DOI: 10.19423/j.cnki.31-1561/u.2023.06.050

基于声学有限元的喷水推进器流道声传播特性研究

李宁^1,2

1.中国船舶及海洋工程设计研究院上海 200011;
2.喷水推进技术重点实验室上海 200011

收稿日期:2023-10-10 修回日期:2023-11-16 出版日期:2023-12-25 发布日期:2023-12-28
作者简介:李宁（1983-）,男,博士,研究员/硕士生导师。研究方向：低噪声喷水推进技术研究。

On Sound Propagation Characteristics of Waterjet Duct Based on Acoustic Finite Element Method

LI Ning^1,2

1. Marine Design & Research Institute of China, Shanghai 200011, China;
2. Science and Technology of Water Jet Propulsion Laboratory, Shanghai 200011, China

Received:2023-10-10 Revised:2023-11-16 Online:2023-12-25 Published:2023-12-28

摘要/Abstract

摘要： 喷水推进器进口流道、推进泵泵壳和喷口构成了一个复杂曲面过流流道,文章针对该流道结构的声传播特性问题,研究了用于声场计算与分析的声学有限元法,并进行了仿真实验。文中建立了喷水推进流道的声学有限元模型,在COMSOL环境中仿真分析了偶极子声源在某型喷水推进器流道中的声传播特性。仿真结果表明：受流道截止频率影响,315 Hz频率附近的噪声不能向进口流道入口方向传播,而在喷口处呈现较高的辐射噪声级;5 kHz频率以下,传递损失有随频率增加而逐渐减小的趋势,但随着频率升高,传递损失有逐渐增加的趋势。

关键词: 声学有限元, 进口流道, 传播特性, COMSOL软件, 快速计算

Abstract: The inlet duct of the waterjet, the pump casing and the nozzle form a complex curved inlet channel. The acoustic finite element method for the calculation and analysis of the sound field is used for the simulation of the sound propagation characteristics of the waterjet inlet channel. An acoustic finite element model of the waterjet inlet channel is established, and the acoustic propagation characteristics of a dipole sound source in the inlet channel of a waterjet is simulated and analyzed in the COMSOL environment. The simulation results show that the noise near the 315Hz frequency cannot propagate to the inlet direction of the inlet channel due to the cut-off frequency of the channel, and the radiation noise level at the nozzle is high. Below the frequency of 5kHz, the transmission loss decreases gradually with the increase of the frequency, and then gradually increases with the increase of the frequency.

Key words: acoustic finite element, inlet duct, propagation characteristics, COMSOL software, fast calculation

中图分类号:

U644.34

李宁. 基于声学有限元的喷水推进器流道声传播特性研究[J]. 船舶, 2023, 34(06): 50-55.

LI Ning. On Sound Propagation Characteristics of Waterjet Duct Based on Acoustic Finite Element Method[J]. Ship & Boat, 2023, 34(06): 50-55.

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基于声学有限元的喷水推进器流道声传播特性研究

On Sound Propagation Characteristics of Waterjet Duct Based on Acoustic Finite Element Method

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