声学黑洞夹层板周期结构在隔振系统中的宽频减振特性研究

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Abstract：Theacousticblackhole（ABH），aaneficienttechqeforcontrollinfexuralwaves，hasbeenwdelyappliedinthefeldof vibrationctroldreseceizdetieatifrofdioaieouce aredifcult tocoodinate，thisstudydrawsonthedesignconceptofponoiccrytalsItfulyleveragesteighdampingandmulioal advantages ofacousticblack holeoscilatorsand proosesa priodicstructureofalocallyresoantacousticblackholesandwichpanel. Bycombiningtheband-edgemodeanalysisofthebandstructurecurvewiththeresonantcharactersticsoftheoscilltors，thisstudy systemticllylucidatesthfoationmechanisoffexuralavebandgapsandexplos teifueneofunitcelldsinparaesonthe bandgapharactersticsMeanhile，byincorporatingoptimizationstrategiessuchasadingmassanditroducingdamping，thebandgap rangeisfurtherbroaded，ndtheefectiveopeningofowerfrequncybandgapsisachevedSimulationandexperientalodelsofthe periodicstructureofteacousticblackholesandwichpnelwereestablishedTheresultsfrombothsimulatiosadexperimentsdeostrate that this structure exhibits significant bandgap characteristics within the 300Hz range，with the center frequency of the bandgap dropping to below 50Hz ，showingexcelentvibrationattenuationefects.Thisresearch providesconceptsandtechnicalpathways forthedesignof lowfrequency and broad-band vibration reduction in floating raft structures.

Keywords：acoustic blackhole;local resonance;periodic structure;flexural wave band gap;vibration isolation

在海洋装备领域，水下航行器的声隐身性能极为关键。（剩余15041字）