可调式表面波屏障隔振性能实验及数值研究

可调式表面波屏障隔振性能实验及数值研究摘要：

本文主要研究表面波屏障在不同频率下的隔振性能，并通过数值模拟方法探究不同参数对隔振性能的影响。在实验中，采用了可调式表面波屏障，通过改变其工作频率来研究其隔振性能。实验结果表明，在屏障工作频率范围内，隔振效果随频率的增加而提高，最大隔振比可达到20dB。随着屏障高度增加，隔振效果也逐渐提高，但增长趋势逐渐趋于平缓。同时，隔离频带的宽度也会随着屏障高度的增加而增大。在数值模拟中，采用了有限元方法，建立了表面波屏障-基座-负荷的三维模型，通过改变屏障参数，包括高度、宽度和材料等，研究其对隔振性能的影响。数值模拟结果与实验数据吻合度高，在实验结果的基础上进一步深化了对表面波屏障隔振机理的理解，并为优化屏障设计提供了支持。

关键词：表面波屏障；隔振；实验研究；数值模拟；优化设计

Abstract：

Thispapermainlystudiestheisolationperformanceofsurfacewavebarriersatdifferentfrequencies,andexplorestheinfluenceofdifferentparametersontheisolationperformancethroughnumericalsimulationmethods.Intheexperiment,anadjustablesurfacewavebarrierwasusedtostudyitsisolationperformancebychangingitsoperatingfrequency.Theexperimentalresultsshowthatwithintheoperatingfrequencyrangeofthebarrier,theisolationeffectincreaseswiththeincreaseoffrequency,andthemaximumisolationratiocanreach20dB.Astheheightofthebarrierincreases,theisolationeffectgraduallyimproves,butthegrowthtrendgraduallytendstoflatten.Atthesametime,thewidthoftheisolationbandwillalsoincreasewiththeincreaseoftheheightofthebarrier.Inthenumericalsimulation,thefiniteelementmethodisadoptedtoestablishathree-dimensionalmodelofthesurfacewavebarrier-base-load,andtheinfluenceofbarrierparameters,includingheight,width,andmaterial,ontheisolationperformanceisstudiedbychangingthem.Thenumericalsimulationresultsarehighlyconsistentwiththeexperimentaldata.Onthebasisoftheexperimentalresults,deeperunderstandingoftheisolationmechanismofsurfacewavebarriersisobtained,andsupportisprovidedforoptimizingbarrierdesign.

Keywords:surfacewavebarrier;isolation;experimentalstudy;numericalsimulation;optimizationdesigTheexperimentalstudyshowedthattheisolationperformanceofsurfacewavebarriersishighlydependentontheirbarrierparameters.Increasingtheheightandwidthofthebarriersgenerallyimprovedtheirisolationperformance.Additionally,thematerialusedtoconstructthebarrieralsoplayedasignificantroleindeterminingitsperformance.Whencomparedtoconcretebarriers,metallicbarrierswerefoundtoperformbetterinisolation.

Thenumericalsimulationresultscomplementedtheexperimentaldataandprovidedmoreinsightsintotheisolationmechanismofsurfacewavebarriers.Thesimulationsshowedthatthebarrierseffectivelyscatteredandabsorbedthesurfacewaves,resultinginreducedenergytransfertotheothersideofthebarrier.

Thefindingsofthisstudyhavepracticalimplicationsforbarrierdesigninreal-worldsituations.Byoptimizingthebarrierparameters,theisolationperformanceofsurfacewavebarrierscanbeimproved,providingbetterprotectionagainstunwantednoiseandvibration.Overall,thisstudyprovidesabetterunderstandingoftheperformanceofsurfacewavebarriersandcanguideengineersincreatingmoreeffectivebarrierdesignsSurfacewavebarriersplayacrucialroleinprotectingbuildingsandotherstructuresfromunwantednoiseandvibrations.However,designingeffectivebarriersthatcanprovidesufficientisolationagainstthesewaveshasbeenachallengeforengineers.Thisismainlyduetothefactthatsurfacewavescanpenetratethroughoraroundbarriers,whichcanleadtoenergyleakageandreducedisolationperformance.

Toaddressthischallenge,astudywasconductedtoinvestigatetheperformanceofsurfacewavebarriersandtoidentifytheparametersthatcouldoptimizetheirperformance.Thestudyusednumericalmodelingtechniquestosimulatethebehaviorofsurfacewaveswhentheyencounteredabarrier.Differentbarrierparameters,suchasheight,thickness,andmaterialproperties,weresystematicallyvariedtodeterminetheirimpactonthesurfacewavetransmissionandisolationperformance.

Theresultsofthestudyshowedthattheheightofthebarrierhadthemostsignificantimpactonitsperformance.Ahigherbarrierheightledtoamoresignificantreductioninthesurfacewavetransmission,indicatingbetterisolationperformance.However,thethicknessofthebarrierhadaminimalimpactonitsperformance,mainlybecausethesurfacewavescouldpenetratethroughthinbarriers.Thematerialpropertiesofthebarrieralsoplayedacrucialroleinitsperformance,withsofterandmoreflexiblematerialsbeingmoreeffectiveinreducingsurfacewavetransmission.

Thestudyalsorevealedthatsurfacewavescouldpenetratearoundtheedgeofthebarrier,leadingtoenergyleakageandreducedisolationperformance.Toaddressthisissue,thestudyproposedusingasecondarybarrier,suchasatrench,aroundtheprimarybarriertopreventthesurfacewavesfromdiffractionandleakage.

Overall,thestudyprovidesvaluableinsightsintotheperformanceofsurfacewavebarriersandcanguideengineersindesigningmoreeffectivebarriers.Italsohighlightstheimportanceofconsideringmultiplebarrierparametersandusingsecondarybarrierstoimprovetheisolationperformanceofsurfacewavebarriersinreal-worldsituationsInadditiontotheinsightsmentionedabove,thestudyalsoshedslightonanumberofchallengesassociatedwiththedesignandimplementationofsurfacewavebarriers.Oneofthemainchallengesisrelatedtothevariabilityofsoilandenvironmentalconditions,whichcanhaveasignificantimpactontheperformanceofthebarrier.

Forexample,theeffectivenessofthebarriermaybereducedifthesoilhasahighdegreeofheterogeneityorifitcontainsundergroundinclusionssuchasrockformationsorburiedobjects.Similarly,environmentalfactorssuchastemperature,moisture,andwindcanaffectthepropagationofsurfacewavesandimpacttheperformanceofthebarrier.

Anotherchallengeisthedifficultyofmeasuringandpredictingthebehaviorofsurfacewavesinreal-worldscenarios.Whilelaboratorytestsareusefulforunderstandingthebasicprinciplesofsurfacewavepropagation,theyoftendonotaccuratelyreflectthecomplexandvariedconditionsencounteredinthefield.Asaresult,itcanbedifficulttoaccuratelypredicttheperformanceofasurfacewavebarrierandoptimizeitsdesignforaspecificapplication.

Despitethesechallenges,thestudyunderscoresthepotentialforsurfacewavebarrierstoprovideeffectiveisolationagainstunwantedvibrationsandnoise.Furthermore,thestudyprovidesaframeworkforthinkingaboutthekeyfactorsthatneedtobeconsideredwhendesigningandimplementingthesesystems.

Lookingtothefuture,itislikelythatsurfacewavebarrierswillplayanincreasinglyimportantroleinavarietyofsettings,fromresidentialneighborhoodstocommercialandindustrialsites.Asengineersanddesignerscontinuetorefinetheirunderstandingofsurfacewavepr