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1、FBGsensorsforthemeasurementofthedynamicresponseofoffshoreoilplatformmodel*aaaLiSunTPPTP,HongnanLiPP,andQiaoJinPPaPPDepartmentofCivilEngineering,DalianUniv.ofTech.,Dalian116024,ChinaAbstractThedynamicresponseofoffshoreoilplatformunderseismicexcitationisthecouplingresponseofliquidandsolidvibration
2、.Inrecentyears,thecomputationofdynamicresponsesanddesignofoffshoreplatformhaveattractedtheattentionofmanyresearchers.Thispaperpresentsashakingtabletestofoffshoreoilplatformmodelscaleddownanactualone.FiberBragggratingisanewmeasurementtechnologywithitssuperiorabilityofexplosionproof,immunitytoelec
3、tromagneticinterferenceandhighaccuracy.Inthispaper,FBGsensorsareusedtomonitorthedynamicresponseofoffshoreoilplatformmodelonline.TenFBGsensorsareinstalled,oneofwhichistemperaturesensor,twoofwhichareaccelerationsensorsandtheothersofwhicharestrainsensors.OneFBGaccelerometerisplacedonthesurfaceofthe
4、shakingtable;andanotheroneisplacedonthetopsurfaceoftheoffshoreoilplatformmodel.FBGstrainsensorsareplacedonthekeypartsoftheplatformmodel.SometraditionalstraingaugesareinstalledinparallelwithFBGstrainsensors.Inthisexperiment,electromagneticinterferenceofstraingaugeisverybig,whiletheFBGstrainsensor
5、hasnotthisphenomenon.Basedontheexperimentsresults,itcanbeconcludedthatFBGsensorissuperiortostraingauge.Keywords:FBG,sensor,offshoreplatform,shakingtable,dynamicresponse1.INTRODUCTIONRecently,opticalfibersensorsdemonstratesuperiorityinthemonitoringofstructuresinharshenvironmentsoverconventionalel
6、ectricsensorsintheirimmunityofelectromagneticinterference[1,2].Amongtheopticalfibersensorsbasedonvariedprinciples,fiberBragggrating(FBG)sensorsarethemostpromisingcandidatestoeffectivelyreplaceconventionalstraingagesforlong-termmonitoringapplicationsinharshcircumstances[3,4].Moreover,theyareflexi
7、bleandcanbeeasilyfrequencymultiplexedtoallowforquasidistributedordistributedin-situsensingatmultiplelocations.IntegrationofFBGsensorswithcivilinfrastructureisanexpandingfield[1].AlthoughFBGsensorshavebeenappliedtothemonitori
