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,((),257061):,,,(ACFM)(FSM)(FMD),,,:;;;;:TG115.28:A:100026656(2003)0720360205NEWUNDERWATERNONDESTRUCTIVETESTINGTECHNIQUESFOROFFSHORESTRUCTURESXULiang2bin,CHENGuo2ming(UniversityofPetroleum,DongyingShandong257061,China)Abstract:Inordertomeettherequirementofoffshorestructuresafetytesting,theresearchanddevelopmentofunderwaternondestructivetesting(UWNDT)techniquesweredescribedandstresswaslaidonsomenewUWNDTtechniquesdevelopedinre2centyears,includingalternatingcurrentfieldmeasurement(ACFM),underwaterimaging,fieldsignaturemethod(FSM)andflood2edmemberdetection(FMD).TheprospectsforthenewUWNDTtechniqueswerealsogiven.Keywords:Nondestructivetesting;Underwaterstructure;Alternatingcurrentfieldmeasurement;Acousticimaging;Fieldsignature,,,,(UWVT)(UWMT)(UWUT)(UWRT),,,,,:2002208210:(59779001),,(ACFM)(MFD),,1[1,2](ACFM)(ACPD),2080,90,,(),ACFM,1995212106325720037NDTVol.25No.7July2003©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.ACFM,[3]ACFM,,,ACPD,,ACFM,,,,,,,BxBz,(1)1ACFMACFM,,,,ACFM2ACFM(2),(ROV)(TSC)120256,50mm150mmACFMTSCACFMU11TSCACFMMODELU21NEWTEMA()ACFM2(FSM)CorrOcean,,,,,(TY),,12h,FSM34min,,0.5%,,,10,,FSM,CorrOceanFSM(FSM2IT),FSMTrend,3[4](FMD)2090,,,,163:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,(3)(4)FMD,FMDFLOODTrack,FMD,,;,,,,,FMD(MPI)344,,,,,4.1[5,6],,,,(100200m)(one2bit),,(DSTO)1991,,,,,,,,,4.2[7,8]10-1lx,,,,,SIT()CCD()ICCD(CCD)EBCCD(CCD)25SIT,800m,10-21lx,Osprey;KongsbergSimradOE1325,,,4.32080,,,,,(480263:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.540nm),,,[911],,,[12],,,,,,,(0.470158m),UWLIS()[13],,,,,,,5,1015a(),,,,,,,,,,,,:(1)ACFM60%ACFM,200[14](2),,(ACFM),,(3),,,,ACFM,,,,,,,(4),,,,,,6,,,,(1),()(),,,(2),,,363:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,;(3),,(4),,FMD,:[1]ToppD,JonesBA.OperationalexperiencewiththeACFMinspectiontechniqueforsub2seaweldinspection[J].Envi2ronmentalEngineering,1994,7(1):9-13.[2]RaineGA,SmithN.NDTofonandoffshoreoilandgasin2stallationsusingtheACFMtechnique[J].MaterialsEvalua2tion,1996,54(4):461-465.[3],.[J].,1998,13(5,6):15-18.[4]SharpJV,StaceyA,WignallCM.Structuralintegrityman2agementofoffshoreinstallationsbasedoninspectionforthrough2thicknesscracking[A].17thInternationalOffshoreMechanicsandArcticEngineeringConference[C].Lisbon:1998.[5]Jones,IanSF.Dimensionalimagesfromahigh2resolutionunderwateracousticimager[A].OffshoreTechnologyConfer2ence[C].Texas:2000.581-585.[6]RobertsHH,WilsonC,SupanJ.Acousticsurveyingoful2tra2shallowwaterbottomsforbothengineeringandenviron2mental[C].OffshoreTechnologyConference[C].Texas:2000.571-580.[7],,,.[J].,2000,29(2):185-189.[8],.[J].,1999,3(14):45-48.[9]FramkMCaimi.Laser/lightimagingforunderwateruse[J].SeaTechnology,1993,5(12):22-27.[10]NG.[M].:,1981.75-80.[11]JulesSJaffe.Computermodelinganddesignofoptimalun2derwaterimagingsystem[J].IEEEJOceanicEng,1990,15(2):101-111.[12],,.[J].,2000,3(27):206-210.[13]ThomasJKulp,etal.Developmentandtestingofasyn2chronous2scanningunderwaterimagingsystemcapableofrapidtwo2dimensionalframeimaging[J].ApplOpt,1993,32(19):3530-3536.[14]DavidATopp.Quantitativein2serviceinspectionusingthealternatingcurrentfieldmeasurement(ACFM)method[J/OL].NDTnet,2000,5(3).()200391126(2003911)III(),:100404(:200437):1000/,600/;2800;()(),(),:(1)(2)II(3)(,III)(4)()(5)()(6)(7)(8)(150//),:021265550277,:()463:©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.