小水线面双体船声场指向性研究  

Investigation on the directivity of small waterplane area twin-hull

作　　者：李广[1] 严斌[1] 江晨半 刘哲 LI Guang;YAN Bin;JIANG Chen-ban;LIU Zhe(National Key Laboratory on Ship Vibration and Noise,China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心船舶振动噪声重点实验室,江苏无锡214082

出　　处：《舰船科学技术》2020年第19期26-29,共4页Ship Science and Technology

摘　　要：针对小水线面双体船的水平指向性、沿船宽方向的垂直指向性、沿船长方向的垂直指向性开展研究,采用声固耦合数值计算方法分析小水线面双体船双下潜体之间的声场耦合作用,对比了单独激励左舷和同时激励左右舷的声场指向性规律。研究结果表明:由于小水线面双体船双下潜体之间的声场反射及耦合作用,增大了船体结构引起的水下辐射噪声;频率较低时,由于声波波长较大,双下潜体对指向性的影响相对较小,随着频率的提高,指向性图的波瓣数量逐渐增多,水下噪声辐射的指向性越来越复杂。Research was carried out on the horizontal directivity,vertical directivity along the width of ship and vertical directivity along the length of ship.The acoustic-structure interaction numerical method was used to analyze the acoustic field coupling between double submersibles of a small waterplane area twin-hull.The regularity of acoustic directivity between left excitation and simultaneous left and right excitation was compared.The research results indicate:because of acoustic field reflection and coupling between double submersibles of a small waterplane area twin-hull,the underwater radiated noise caused by the hull structure has increased.In the low frequency band,the effect of double submersibles on directivity is relatively small because of long acoustic wavelength.As the frequency increases,the number of lobes in the directional graph is gradually increasing,and the directivity of underwater radiated noise is becoming more and more complicated.

关 键 词：双体船 指向性 声固耦合 

分 类 号：TB532[理学—物理]