船舶机舱模型振声环境预报与控制  

Prediction and Control on Vibro-acoustic Environment of Marine Engine Room Model

作　　者：梁炳南[1] 于洪亮[1,2] 蔡延年 

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026 [2]集美大学轮机工程学院,福建厦门361021

出　　处：《噪声与振动控制》2014年第6期107-111,共5页Noise and Vibration Control

基　　金：中央高校基本科研业务费专项资金资助项目(3132013337)

摘　　要：以某航海教学实习船机舱为原型,将此振动—声辐射耦合系统简化为箱形多腔结构,建立多腔结构及其单元腔室有限元模型,考虑液舱布置与充液、激励源处设置隔振器等情况,对结构进行频率响应分析,运用声学边界元法对舱室噪声进行预报,通过对舱室中心场点声学贡献较大的板件进行约束阻尼处理,有效降低舱室噪声。并进行船舶机舱模型振动—声辐射实验。分析表明:研究三舱段船舶机舱模型振声性能时,充液及增加充液舱数,对模型固有频率影响明显,通过设置隔振器能有效降低舱室振声等级,在非激励源舱室敷设约束阻尼材料,也可起到较好降噪作用。The engine room of a training ship for navigation teaching was taken as a prototype, and the finite elementmodel of multi-tanks structure and its unit chamber was built when the vibro-acoustic coupling system was simplified. Frequencyresponse analysis was carried out in the consideration of filling liquid, arrangements of the liquid tanks, and locationsof excitation source with vibration isolator. The noise of ship cabin was predicted by means of acoustic boundary elementmethod and the noise level was reduced effectively by using constrainted damping treatment on plates of a largeamount of acoustic contribution to the center field. And the vibro-acoustic radiation experiment of the marine engine roommodel was conducted. Analysis indicates that the natural frequency is influenced obviously with different conditions of fillingliquid and increasing the number of tanks filled with liquid. Vibration isolator can reduce the vibro-acoustic level. Constraintdamping materials laid in the cabin with non-excitation source can also reduce noise effectively.

关 键 词：振动与波 船舶机舱模型 边界元法 声辐射 声学贡献度 

分 类 号：U661.44[交通运输工程—船舶及航道工程] TB532[交通运输工程—船舶与海洋工程]