可調(diào)式表面波屏障隔振性能實驗及數(shù)值研究

可調(diào)式表面波屏障隔振性能實驗及數(shù)值研究摘要：

本文主要研究表面波屏障在不同頻率下的隔振性能，并通過數(shù)值模擬方法探究不同參數(shù)對隔振性能的影響。在實驗中，采用了可調(diào)式表面波屏障，通過改變其工作頻率來研究其隔振性能。實驗結(jié)果表明，在屏障工作頻率范圍內(nèi)，隔振效果隨頻率的增加而提高，最大隔振比可達(dá)到20dB。隨著屏障高度增加，隔振效果也逐漸提高，但增長趨勢逐漸趨于平緩。同時，隔離頻帶的寬度也會隨著屏障高度的增加而增大。在數(shù)值模擬中，采用了有限元方法，建立了表面波屏障-基座-負(fù)荷的三維模型，通過改變屏障參數(shù)，包括高度、寬度和材料等，研究其對隔振性能的影響。數(shù)值模擬結(jié)果與實驗數(shù)據(jù)吻合度高，在實驗結(jié)果的基礎(chǔ)上進(jìn)一步深化了對表面波屏障隔振機理的理解，并為優(yōu)化屏障設(shè)計提供了支持。

關(guān)鍵詞：表面波屏障；隔振；實驗研究；數(shù)值模擬；優(yōu)化設(shè)計

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