水下圆柱体声学隐身斗篷性能研究  

Study on acoustic cloaking performance of underwater cylinders

作　　者：熊仲营 叶仁传 XIONG Zhongying;YE Renchuan(School of Naval Architecture&Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212100,China;Ocean College,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,镇江212100 [2]江苏科技大学海洋学院,镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2024年第5期23-31,共9页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：江苏省高层次创新创业人才引进计划项目(JSSCBS20211001);江苏科技大学科研启动基金项目(1012932009)。

摘　　要：水下环境下声学隐身斗篷的发展对潜艇隐身能力的提升具有重要意义,基于水的密度、声速和体积模量为出发点设计了圆柱体水下声学隐身斗篷及其分层模型,研究其在500~3500 Hz范围内圆柱体外周声场特征和隐身性能.研究发现随着隐身层厚度和频率的增加,隐身层内部区域靠近刚性圆柱体的部分出现了零声压区域,导致有效隐身厚度变小.通过增加隐身层厚度来实现高隐身性能的设想在高频率下并不一定成立,但可以延迟零声压区域的出现,巩固隐身层的有效厚度,高频区间则应增加隐身层层数.在3500 Hz频率时,随着声学隐身斗篷层数的增加,实际是减小其散射声压幅值,周期性也更加明显,从而导致总声压偏离背景声压的区域变得更小,隐身能力得到增强.通过对水下圆柱体隐身性能的研究,有效给出了较大频率范围内声学斗篷隐身能力提升的方向.According to the significance of cloaking of submarine,an underwater cylindrical acoustic cloak and its layered model are designed based on the density,sound velocity and volume modulus of water in this paper.The acoustic field of the cylinder and acoustic cloaking performance are studied at 500~3500 Hz.It is found that with the increase of its thickness and operating frequency,a region of zero sound pressure appears in the inner region of the structure of acoustic cloak near the cylinder,which leads to the decrease of effective cloaking thickness.The idea of achieving high acoustic cloaking performance by increasing the thickness of cloaking structure is not necessarily valid at high frequency,but it can delay the appearance of zero sound pressure region and consolidate the effective cloaking thickness.Good acoustic cloaking performance should increase the number of layers at high frequency.At 3500 Hz,with the increase of the number of acoustic cloaking layers,the scattered sound pressure amplitude becomes smaller and the periodicity becomes more obvious.As a result,the region where the total sound pressure deviates from the background sound pressure becomes smaller and the cloaking performance is enhanced.According to the analysis results,the direction of improving the cloaking performance of acoustic cloak in wider frequencies is given effectively.

关 键 词：潜艇 声学斗篷 隐身性能 散射声压 声场分布 

分 类 号：U674.76[交通运输工程—船舶及航道工程]