水下多层复合阻尼板声振模型及影响规律研究

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关键词：一阶剪切变形理论；多层复合阻尼板；改进傅里叶谱方法；声振耦合分析模型；声辐射特性 中图分类号： U663.9+5 文献标志码：A DOI:10.16385/j.cnki.issn.1004-4523.202401073

Vibro-acoustic model and influence law of underwater multi-layer composite damping plate

ZHANG Yantao',WANG Xueren1,LIANG Zehao², TANG Yuhang', JIN Guoyong² (1.Chinese People’sLiberation Army Unit 92578，Beijing100161，China; 2.Collge of Shipbuilding Engineering，Harbin Engineering University，Harbin 15ooo1，China）

Abstract:Aimingatevibratioandacousticdiationprobleofunderwatermulti-ayercompositedampingplatestructureebededn infiniterigidbafleteeeequationisdrivedbasdontefisodershrdefoatiotorydigzgateteoyTeproed Fourierspectrummethodandthecomplementarytermfunctionareusedtoconstructthedisplacementadmisiblefunction.Troughthe Rayleighintegralequationandteeergvariatioalpriciple，aunifidmodelforthevbro-acosticouplingaalysisofuderwaterulti layercompositedamping platestructuresuitableforcomplexboundaryconditionsisestablished.Theacuracyandaplicablityofthe establishedmodelareverifidbyumeicalexamples.Onthisbasisteectsoffudmedm，boundaryconditios，materialproperties， functionallygradedindex，porosity，geometricparametersandoterfactorsontevibrationandacoustcadiationcharacterstisofuifo panellayerandfunctioallgadedmateriallyercompositedampingplatestructureareaaledTeesultssowtatthemeansuare vibrationvelocityoftecompositedampigplateinwaterislowerthanthatiai，whiletheradiatedsoundpowerishigertanthatinair. Increasingthethicknsoftedampinglerhaslitlctonthevratioadacousticdiationharacteristicsoftempositeding plateIncreasingthedampinglosctoroftecoelayercaeectivelysuppessthevirationadacousticadiationlevelofthestructure.

eywords:first-ordersheardeformationtheory；multi-layercompositedampingplate;improvedFourierspectrummethod;vibroacoustic couplinganalysismodel; sound radiationcharacteristics

板结构是船舶工程中一种常见的基本结构，当受到外部激励时，板结构振动引起的应力和位移问题可能导致结构产生噪音。（剩余30379字）