湍流激励下夹芯板-腔模型声振特性分析

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中图分类号：U663.1 文献标志码：A DOI:10.16385/j.cnki.issn.1004-4523.202403031

1³，123，¹2，1³，13（1.华中科技大学船舶与海洋工程学院，湖北武汉430074；2.高新船舶与深海开发装备协同创新中心，上海 3.)

Analysis of vibration and acoustic characteristics of sandwich plate-cavity excited by turbulent boundary layer

ZHANG Cheng13,LI Tianyun123, ZHU Xiang123,HANXinyi13,PENGKehui1,3 (1.SchoolofNavalArchitectureandOceanEnginering，Huazhong UniversityofScienceandTechnology，Wuhan43074，China; 2.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration，Shanghai 20o240，China； 3.Hubei KeyLaboratory of Naval Architecture and Ocean Enginering Hydrodynamics，Wuhan 43o074，China）

Abstract:Compositesandwichmaterialsarewidelyusedinthedomestructureofunderwatervehicles.Inordertostudytheirself-oise perforanceunder teexcitationof trbulentfluctuatingpressure，thispaperestablishesadynamic modelofthesandwichplatebasedonthe LayerwisetheoryAsem-nfinitedomainsoundfieldandafiniteenclosedacousticcavityarerespectivelycoupledonbothsidesofthe sandwichplate，ndamorepracticalsadwichplatecavitydomaincouplingodelisstablishd.Todimesioalandtredisioal improvedFourierseriesarerespeielyusetoescribethdsplacemetoftesandichplateandtesoudpressreinteeclodacoustic cavity，makingthecouplingmodelaplicabletocomplexstructuralboundaryconditionsandcompleximpedanceacousticavityboudary conditions.Theresponsefunctionof theunderwatersandwichplate-cavitycouplingmodelissoledbyHamilton’spriciple.Combinedwith thecross-owerspectrummodeloffuctuatingpressretepowerspectralfuctiosoftevibrationresponseontesandwichplatesurface andtheoundpresureintheacousticcavityarederivedComparedwithasingle-layerplate，thesandwichplatehasbetervibration suppressonpeformanceatgfrequencies.Inadditontispapralsoexpoes teiflueneofavityeightotefowduedspose ofthesandwichplateavityouplingodelprovidingathoreticalreferecfrtesigofactualsonardomstructuresanditeal sonar cavities.

Keywords: turbulent boundary layer pressure; Layerwise theory;acoustic cavity;acoustics-vibration coupling

潜艇声呐导流罩在湍流脉动压力作用下产生的结构自噪声会干扰罩体内部水听器的正常工作，特别是舰艇航速达到 10kn 以上时，流激振动噪声在声呐自噪声中的占比大大增加[]。（剩余20515字）