毕业设计报告-飞机多层结构的多频涡流检测.pdf

112643526435uu(u90-0-0-050-0-0-0I00-00060-00-u000MultifrequencyeddycurrentinspectionofmultilayeredstructuresinaircraftsStudentName:FuYuClassu110813Supervisor:FuYuewenAbstract:!Withtherapiddevelopmentofaviationindustryinrecentyearstheaviationsafetyismoreandmoreimportanttous.Inbothmilitaryaviationandcivilaviationfieldhowtomakethepreventivemaintenanceandpreventmechanicalfailureinoperationofaircraftsisparticularlyimportant.Especiallythoseoverageaircraftsbeyondtheoriginaldesignlife(20to25years)arestillinservicetheyarevulnerabletotheinfluenceofcorrosiondamageandfatiguecrack.HowtobeefficientlyandmakeaccuratedetectionofthesedefectswhichendangerthepropertyandsafetyoflifeonboardOneofthesismulti-frequencyeddycurrenttesting.Itseasytoproducefatiguecrackneartherivetsinrivetingmulti-layerstructurespronetocorrosiondefectsbetweenthelayers.Firstlythispaperintroducestheprincipleofmulti-frequencyeddycurrentinspectiontechnology.Accordingtothequestionsmentionedabovewebuildtheexperimentalplattosimulatemulti-levelstructureinaircrafts.SecondlyUsingdouble-frequencyeddycurrentdetectortodetectthesimulatedmultilayerstructurediscussesthedifferencesandcharacteristicsofsingleandmulti-frequencyeddycurrenttestinganalyzestheadvantagesofmulti-frequencyeddycurrenttestinginmultilayerstructuredetection.Equipmentproducecurrentindifferentfrequencyanddetectbyoneeddycurrentprobevariousfrequencysignalscandetectdefectsindifferentdepthofmultilayerstructure.Theresultsshowthatmulti-frequencyeddycurrenttestingrealizetheeffectivedefects.Multi-frequencyeddycurrenttestingeliminatesnoisysignalcausedbyfastenersinterlayerandairgapenhancetheflawsignal.Ithasgreatadvantagesindetectionofinterioroftheaircraftskin.Thetestingpracticeandtheconclusionofthisarticlecanbeusedulti-frequencyeddycurrenttestingtechnologyintheactualdetection.Keyword:Multi-frequencyeddycurrentCorrosiondefectsRivetingmulti-layerstructuresCrackdefects.SignatureofSupervisor:qrqr992299222Phasec2200I2110-210-3100-41-510-99221100-2015.3.09320-2015.4.1132015.4.20310-2015.4.2132015.4.2541-2015.4.2632015.5.16510-2015.5.1732015.5.31610-2015.6.0132015.6.067190-2015.6.0732015.6.26221J.A.BieberS.K.ShaligramJ.H.RoseJ.C.Moulder.Time-gatingofPulsedEddyCurrentSignalsforDefectCharacterizationandDiscriminationinAircraftLap-JointsJ.ReviewofProgressinQNDE199716B:1915-1921.2SMITHRAHUGOGR.Deepcorrosionandcrackdetectioninagingaircraftusingtransienteddy-currentNDEJ.Insight200143(1)u14-24.3J.A.BieberS.K.ShaligramJ.H.Roseetal.Time-gatingofpulsededdycurrentsignalsfordefectcharacterizationanddiscriminationinaircraftlap-joints.ReviewofprogressinQNDE199716B:1915-1921.4B.A.LepineB.P.WallaceD.S.ForsythPulsededdycurrentdevelopmentsforbiddencorrosiondetectioninaircraftstructures.NDTEInternational19994(1):1-10.5S.GiguereB.A.LepineJ.M.S.DuboisPulsededdycurrenttechnology:Characterizingmateriallosswithgapandlift-offvariations.ResearchinNondestructiveuation2001(13):119-129.6AliSohpianGuiYunTianetal.AfeatureextractiontechniquebasedonprincipalcomponentanalysisforpulsedEddycurrentNDTJ.NDTEInternational2002(36):37-41.7LIBBYHLtIntroductiontoelectromagneticnondestructivetestswMxtNewYork:JohnWileypSonsInc1971t8GuiYunTianAliSophian.DefectclassificationusinganewfeatureforpulsededdycurrentSensorsJ.NDTEInternational2005(38):77-82.9AliSophian.CharacterizationofSurfaceandSub-surfaceDiscontinuitiesinMetalsUsingPulsedEddyCurrentSensorsC.ThesistheUniversityofHuddersfieldinpartialfulfilmentoftherequirementsforthedegreeofDoctorofPhilosophy(TheUnitedKingdom)2003.10G.Y.TianY.LiandC.Mandache.StudyofLift-OffInvarianceforPulsedEddy-CurrentSignalsJ.IEEETransactiononMagnetics200945(1):184-191.II8989(2222)2222II22sososoouu()nsso、snouu()uu()1!(“!)!)!)!2(!(!()!(-!(.!3)!)(!)(!)!4!(!)!5-!(!)(!6(!(!(!(-(.201511.1#s“ssoso）n“s、s“o）sossoss“onss“oz）n、ssozzoso、z、s。oso1.2#“#1.2.11970s；LibbyHL。ssz”qrIJo、s20152o、ssnn：I(Jo、。so1983sIBG、qPreventiveMulti-FrequencyEddy-currentTechnologysPMFTr、8s11000s8“ossnns8ss、I)Jo1993s；ThompsonJG、sIJo2002sEdwardP、ss。ssIJo2003sBosBVDSAAB2000sn。sI-Jo2006sTMTeddyMax4UAirbusA340-600sI.Jo1.2.2）o1992s；ZETECMIZ-18AIJo1995ET-255AIJo1998IJo2000sEEC-3948sI(Jo2002s“I)Jo2009s、snIJosszhhMFE-1s20153ss。sIJos、zso1.3#qrsnnssoutso(tso)tPhasec2200s、otnssoto1.4#!so(!sso)!sno!sno!zso1.5#“s、“so201542.1#sso(os“ssoso(qrsoo20155sEPu=drdzdrdztzrVVpf)(q(r=dSBtVp1dSAt)(1cdltAq(rsEkos“s3“ssos）so”zso3“ss”o2.2#ossszoo”ss“osossssssooG9sss20156ss4825GssIJo2.3#ssnsossouq()r:hhPhhehh8%VghhB%Vq()rsPnengonnssossozsso()zs%Oq)-rs%Oq)-rso%Oq)-rdssfxxeJJ=020157q2rdodsodo(I-Jo2.4#zso4su=scdSBdtddlEq(r4sssu+=scsdSDdtddSJdlHq(rBsu=SVqdvdSDq(-rBsu=sdSB0q(.rs8n5n6n3nnfZ:oED0=q(r0BH=q(rEJ=q(rq(rq(.rsq(rq(rf1=20158o，zszoutBE=q(rtDJH+=q()r=Dq(r0=Bq(r2.5#snso201593.1#so)unnnosu!nso(!so)!so!snosuto(t)thhoto2015103.2#3.2.1Phasec220076CRO8XMTSRKOM(sns%sososo)(RKOM(uso(o)3.2.2unnnnozsnnnoszoosozqrs201511ozoososso：s“ozosnsosoCRO8XMTS-2ssVVsVVss)8bRbo)-2szsosOVXso)-22015123.3#3.3.1oVVcVVcVVqccrsVVsosozokso3.3.2)!so)n(nnVVsnn(nnVVos)VVcVVs)VVcVVs)VVc(VVs)VVc-VVs)VVc.VVs(VVc(VVo(!VVy.VVo2015133.4#sso2015144.1#4.1.1s”zsnsnqr”olmossmo201515sVVn(VVn)VVnVVoso4.1.2=XNOuAOPUOMSX(4Rs5SYUKau(GsESOu4R(：ss)ssqVVVVrsqlm：rs：s4.2#=XNO0AOPU(4Rs5SYUKau(GsESOu4R%4R(sOSuOVi(201516)(：s324UOKo)A64sssA64o67C8(sBMXUU”s2XoA64YOKSXs5SYUKauGsESOuBVoBVBVRKOBV7KSso4.3#sCRO8XMTSRKOM(（o2015175.1#so“uqVV(VVrssoz(8bn(8bnVVoK(8bL(8b201518MVV(ssosssosBD=729ksssoqKrqLr(8b(8b)VV201519so)n“ssosssssoos“sssVVo“sszo5.2#ns“uzsszos(8bRbouznssonsoqKr(Rb201520qLrRb)：lqKr(RbqLrRb：msRb(Rbo201521qKr(RbqLrRb：lqKr(Rb201522qKrRb：m(“szossosssonoqKr(RbqLrRb201523qMr-：mqKr(8bqLr8b201524qMr.：m)sosssszos“sssso：lsssso5.3#nnsso2015256.1#so(ssszo)s“oszsoszsosozosssso6.2#znsszoss：nns）osszo(zsnoss“so)。sssss201526osnsososso6.2#sossnnonsoszossozssos”）so201527IJLIBBYHL.IntroductiontoelectromagneticnondestructivetestwMx.NewYork:JohnWileypSonsInc1971tI(J.、(I:J.(:(.I)J.z、I:J.(:-.-.)IJ.、I:J.、(:()IJThompsonJG.SubsurfaceCorrosionDetectioninAircraftLapSplicesUsingaDualFrequencyEddyCurrentInspectionTechniqueJ.Materialsuation199351(12):1398-1401.IJEdwardPMansonJ.TheApplicationo