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OPENJOURNALOFEARTHQUAKERESEARCH,2013,2,4759HTTP/DXDOIORG/104236/OJER201323006PUBLISHEDONLINEAUGUST2013HTTP/WWWSCIRPORG/JOURNAL/OJERSHOCKPROOFEXPERIMENTALSTUDYOFAUTOMATEDSTOCKERSYSTEMINTHEHIGHTECHFACTORYJYHCHAUWANG1,JENNSHINHWANG2,WEIJENLIN1,FANRULIN2,CHINLIANTSAI1,PINHONGCHEN11INNOLUXCORPORATION,CHINESETAIPEI2NATIONALCENTERFORRESEARCHONEARTHQUAKEENGINEERING,CHINESETAIPEIEMAILVIVIENTSAIINNOLUXCOMRECEIVEDJUNE7,2013REVISEDJULY12,2013ACCEPTEDAUGUST6,2013COPYRIGHT2013JYHCHAUWANGETALTHISISANOPENACCESSARTICLEDISTRIBUTEDUNDERTHECREATIVECOMMONSATTRIBUTIONLICENSE,WHICHPERMITSUNRESTRICTEDUSE,DISTRIBUTION,ANDREPRODUCTIONINANYMEDIUM,PROVIDEDTHEORIGINALWORKISPROPERLYCITEDABSTRACTTHISSTUDY,WITHTHESHAKETABLEEXPERIMENTSINTHENATIONALEARTHQUAKEENGINEERINGRESEARCHCENTER,INVESTIGATEDTHESEISMICBEHAVIOROFAUTOMATIONSTOCKERSYSTEMTHEAUTOMATIONSTOCKERSYSTEMPROVIDEDAFASTANDEFFECTIVEMETHODFORSTOCKINGPRODUCTSINTHEHIGHTECHFACILITIESFIRSTLY,THEORIGINALMACHINETESTSFORTESTINGCOMMONSTOCKERSYSTEMWERETOINVESTIGATETHESEISMICCAPACITYANDFAILINGMODESSECONDLY,THETEAMCOMPLETED2KINDSOFREINFORCEMENTTESTSTOINVESTIGATETHESEISMICBEHAVIOR1THEINSTALLATIONOFBRACINGTOIMPROVEOVERALLSTIFFNESS2THEINSTALLATIONOFTHEVISCOUSDAMPERSTOIMPROVETHEOVERALLDAMPINGRATIOINCOMPARINGTHERESULTSANDPERFORMANCEOFTHETHREEEXPERIMENTS,WELEARNEDFROMTHERESULTSOFTHETOPLAYERACCELERATIONTHEINSTALLATIONOFBRACINGHADTHELARGESTACCELERATIONVALUE,THEORIGINALMACHINETHESECONDACCELERATIONVALUEANDTHEDAMPERTHELOWESTACCELERATIONVALUETHEBESTEFFECTWASTHEINSTALLATIONOFTHEDAMPERTHERESULTOFTHECOMPARISONOFTHETOPFLOORDISPLACEMENTMETERSHOWEDTHATTHEHIGHESTDATAWASTHEORIGINALMACHINETHESECONDDATAWASWITHTHEDAMPER,THELOWESTDATAWASTHEINSTALLATIONOFTHEBRACINGBASEDONTHEPRELIMINARYASSESSMENTONTHEBESTSEISMICRETROFITWAYSOFTHESTORAGESYSTEM,WEFURTHEREXAMINEDTHEFEASIBILITYANDAPPLICABILITYOFAUTOMATICSTORAGESEISMICRETROFITINTHEHIGHTECHFACTORYKEYWORDSHIGHTECHFACILITIESAUTOMATIONSTOCKERSYSTEMSHAKETABLETESTVISCOUSDAMPERS1INTRODUCTION11BACKGROUNDANDMOTIVATIONOFTHESTUDYTHESCIENCEPARKISTHECOUNTRYSECONOMICARTERIESHSIAO,PEIFANG,20051BECAUSETAIWANISLOCATEDONCIRCUMPACIFICSEISMICBELT,ONEOFTHEHIGHLYFREQUENTSEISMICAREAS,THEAMOUNTOFINVESTMENTINHIGHTECHINDUSTRIALEQUIPMENTSISUSUALLYREALLYEXTREMELYASINGLEPROCESSEQUIPMENTMAYCOSTOVER3MILLIONUSDOLLARSTHEREFORE,INTHEHIGHTECHINDUSTRIES,FROMTHESTANDPOINTSONOPERATINGANDCOSTINBUSINESS,EQUIPMENTFORSEISMICASSESSMENTSHOULDBEGIVENHIGHPRIORITY2TOPREVENTPOTENTIALSERIOUSDAMAGECAUSEDBYEARTHQUAKE,THEMAINPROCESSEQUIPMENTANDPRODUCTIONLINESAREREQUIREDTOIMPROVESEISMICDESIGNINTHESTRUCTUREOFTHESYSTEMINORDERTOENSURETHATTAIWANSHIGHTECHINDUSTRYOBTAINSATISFACTORYSHOCKPROOFPROCESSEQUIPMENTINDEALINGWITHEARTHQUAKES,THEPLANTSAREREQUESTEDTORESEARCHANDDEVELOPSUSTAINABLETECHNOLOGY3THEREFORE,THEVARIOUSHIGHTECHINDUSTRIESAREACTIVELYINVOLVEDINISSUESOFSHOCKPROOF12LITERATUREREVIEWDIFFERENTFROMTRADITIONALARCHITECTURE,THESPECIALDEMANDFORTHECONSTRUCTIONALSTRUCTUREOFTHEHIGHTECHFACTORIESNOTONLYREQUIRESSTRINGENTSTRUCTURALSEISMICSAFETY,BUTALSOPROVIDESSUBSTANTIALPREVENTIONFROMMICROVIBRATIONHARMINTHECLEANROOMOFMANUFACTURINGENVIRONMENT4WITHTHEHIGHTECHINDUSTRYCONTINUINGTORISE,THEINCREASINGDEMANDSINMANUFACTURINGPROCESSAREALSOFACINGNEWCHALLENGESINDISPLAYINDUSTRYTHEMOSTOBVIOUSCHANGESARETHEINCREASINGSIZEOFTHEGLASSPANEL,ASINGLEEQUIPMENTSIZEINCREASINGLYBECAMELARGERANDITSFUNCTIONMORECOMPLEXTHEFACTSINVARIOUSEQUIPMENTMANUFACTURINGPROCESS,COMPLEXCONSTRUCTIONANDENORMOUSNUMBERSCANCAUSEIMPACTONTHEBASELINEASSESSMENTSOFTHEEQUIPMENTSEISMICDEMANDCHEN,CHANGLIANG,20085THEAUTOMATEDMATERIALHANDLINGSYSTEM,AMHS,ISTHECENTRALSYSTEMTOREACHMANUFACTUREPROCESSAUTOCORRESPONDINGAUTHORCOPYRIGHT2013SCIRESOJERJCWANGETAL48MATIONTHECLEANROOMSTOCKERISONEOFIMPORTANTCOMPONENTSINDISPLAYFACTORYTHEAUTOMATIONSTOCKERSYSTEMWASSHOWNINFIGURE1,LIN,KUNBIN20076THESYSTEMISABLETOUSESTOCKERSPACEEFFICIENTLYBYUSINGCOMPUTERONLINESYSTEMTOREALIZEAUTOMATEDCONTROLMANUFACTURE,ANDCONTINUETOCHECKTHEEXPIREDOROVERDUEINVENTORIALPRODUCTSITCANPREVENTPOORINVENTORYANDIMPROVEMANAGEMENTEFFICIENCY,ASWELL,SHORTENPRODUCINGTIMEANDREDUCETHEOPERATINGCOSTTHEAMHSAPPLICATIONHASBECOMETHEMAINSTREAMINDISPLAYFACTORYDUETOTHENATUREOFALUMINUMEXTRUSIONMATERIALSWHICHISLIGHTWEIGHT,HIGHSTIFFNESS,ANDSIMPLICITYTOASSEMBLE,THEALUMINUMEXTRUSIONMATERIALSHAVEBEENGENERALLYUSEDONCOVERANDTHEINTERNALSTRUCTUREFORTHEAMHSINTHECLEANROOMTHISEXPERIMENTAIMSTOEXPLOREWHATTHESTOCKERSSITUATIONOFTHEOVERALLSTRUCTUREIS,USINGALUMINUMEXTRUSIONMATERIALS,WHENEARTHQUAKESOCCURFOLLOWINGGENERATIONSOFEVOLUTION,THESIZEOFGLASSPANELANDTHESTORAGESYSTEMARERELATIVELYENLARGEDINTHELARGESTOCKERSYSTEM,AFULLLOADOFCASSETTESWEIGHTSABOUT600KGITSLENGTHANDWIDTHARE4M,ANDHEIGHTUPTO7MWHENANEARTHQUAKEOCCURS,DUETOTHEOVERALLCASSETTEMASSRATIOISMORETHANTHESHEDBIT,THEWHOLESTOCKERWITHLOWSTIFFNESSTENDSTOHAVESHAKENVIOLENTLYWHICHCAUSESFRACTIONOFTHEGLASSPANELASCASSETTEEDGESSLIDEOFFANDCOLLIDEANOTHERISSUEISTHATTHEAUTOMATEDSTOCKERSYSTEMISHIGHPRECISEEQUIPMENTIFTHESHEDBITISEXCESSIVELYDEFORMED,ITWILLAFFECTTHEACCURACYOFTHEOPERATIONOFTHEMECHANICALARMWHENTHESITUATIONISCRITICAL,THESYSTEMISREQUIREDTOSTOP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910020406081EW12345678910020406081VSPECTRALRESPONSEACCELERATIONAGFREQUENCYHZFREQUENCYHZFREQUENCYHZSPECTRALRESPONSEACCELERATIONAGSPECTRALRESPONSEACCELERATIONAGFIGURE4THETRIAXIALDURATIONHISTORYGXNS,GYEW,GZVTHE0304SEISMICWAVE,CHIAHSIENEARTHQUAKEINTAIWAN,FROMCHY099THESHANHUAELEMENTARYMEASURESTATIONSTHERESPONSESPECTRUMMETTHETAIWANOFFICIALCODEBUILDINGSEISMICDESIGNSPECIFICATIONSANDCOMMENTARY22EXPERIMENTALEQUIPMENTANDESTABLISHINGTHESHAKETABLETESTSWEREHELDINTHENATIONALEARTHQUAKEENGINEERINGRESEARCHCENTERTHESPECIFICATIONOFTHESHAKETABLEWAS51M51MTHESAMPLESIZEOFSTOCKERD6000TYPEWAS400030507680MM,ANDTHETOTALWEIGHTWAS5650KGTHESTOCKERINCLUDESANEMPTYSCAFFOLDWITHEIGHTCASSETTESCASSETTE,REFERREDASCST,ANDASINGLECSTWEIGHTS600KGTHECONFIGURATIONOFOVERALLEXPERIMENTALSTOCKERSTRUCTUREWASSHOWNINFIGURE5THEFIXEDFORMOFTHESTOCKERMETTHEACTUALSITUATIONWHICHWAS12FEETLOCKEDSOLIDONTHEBASEANDTHEBASEWASFIXEDBYEXPANSIONBOLTSTOTHECONCRETEFRAMETHETWOFORMSOFMCNYLONSTOPPERWEREINSTALLEDINCASSETTESHOWNINFIGURE6THERIGHTSIDEOFMCNYLONCSTREFERSTORCSTTHATWASTHEORIGINALCONDITIONOFTHEMCNYLONSTOPPERINTHESTOCKERTHELEFTSIDEOFMCNYLONSTOPPERCSTREFERSTOLCSTTHELCTSWASMOUNTEDMETALSTOPPERANDUSINGRUBBERCUSHIONEDMATERIALTHEPURPOSEOFTHEMCNYLONSTOPPERINSTALLATIONWASTOLIMITCASSETTEMOVINGRANGEWHENEARTHQUAKESOCCURTHEACCELEROMETERANDDISPLACEMENTMETERSOFTHEINSTALLEDPOSITIONWASSHOWNINFIGURE7BOTHSENSORSAREINSTALLEDONTHEDIAGONALCORNERSOFTHETOPLAYER,THEFIRSTLAYERANDTHEBOTTOMLAYEROFTHESTOCKERTHEACCELEROMETERSMEASUREDTHETHREEAXESX,Y,ANDZAXESTHEDISPLACEMENTMETERMEASUREDFORTHEXANDYAXESTOEXPLORETHECSTSEISMICSCENARIO,THETHREEAXIALACCELEROMETERWASEQUIPPEDATTHETOPLAYEROFTHETWOCSTTHETWOCST,RIGHTSIDEANDLEFTSIDE,WEREATTHETOPLAYEROFSTOCKERFOROBSERVINGANDSIMULATINGTHEGLASSSLIDINGCONDITIONINSIDETHECSTDURINGEARTHQUAKES,THETEAMSELECTEDPVCBOARDINADDICTION,INORDERTOAVOIDTHEDAMAGEOFTHESHAKETABLEORPERSONALINJURIESASTHEEXPERIMENTOFTHESHACKTABLEMAYRESULTINGLASSBREAKAGEORFALLINGALSO,THEFRICTIONCOEFFICIENTOFPVCBOARDISSIMILARTOGLASSTHERESULTOFTHEEXPERIMENTALTESTSHOWEDTHEFRICTIONCOEFFICIENTOFTHEGLASSWITHTHESUPPORTMATERIALISAPPROXIMATELY051THEFRICTIONCOEFFICIENTOFTHEPVCBOARDWITHTHESUPPORTMATERIALISABOUT04523RESULT231THEDAMAGESITUATIONOFTHESTOCKERTHEFIRSTPHASEOFTHEEXPERIMENTALRESULTSSHOWEDTHATWHENPAWAS200GAL,THETORSIONANDSHAKINGOFTHESTORAGESPACEOCCURREDSLIGHTLYTHECSTONTHETOPLAYERALSOFOUNDLITTLEDISPLACEMENT,BUTITDIDNOTCAUSESTOPPERCOLLISIONWHENPAWERE300GALAND400GAL,THESTORAGESPACESOFSTOCKERVIBRATEDSIGNIFICANTLYITCAUSEDLARGEDISPLACEMENTANDCOLLISIONBETWEENSTOPPERANDCSTONTHETOPLAYEROFCSTFEWPARTSOFTHEPVCBOARDSSLIDAWAYTHESECONDPHASETHEAIMFORTHEEXPERIMENTWASTOUNDERSTANDTHEULTIMATESTRENGTHOFSTOCKERWHENPAWAS500GAL,ROCKINGANDSHAKINGINTHESTORAGESPACESOFTHESTOCKOCCURREDVIOLENTLYTHETOPLAYERCSTAREDISPLACEDANDHITTHESTOPPERANDDARTEDOUTOFTHEPVCBOARDS,ANDTHESCREWSWERELOOSENEDONTHEFIRSTLAYEROFLEFTCASSETTESFLANGEWITHTRELLISJOINT,SHOWNINFIGURE8WHENPAWAS600GAL,ROCKINGANDSHAKINGVIOLENTLYINTHESTORAGESPACESOFTHESTOCKOCCURREDTHERCSTANDLCSTDISPLACEDREARWARDANDEXCEEDEDBEYONDTHELIMITATIONOFTHEMCNYLONTHECASSETTEWASSTUCKONTHEEDGEOFTHEMCNYLONSTOPPERANDCOULDNOTTOMOVEALARGENUMBEROFPVCBOARDHADSLIDTHEREFORE,THEEXPERIMENTENDEDFINALLY,THETEAMINSPECTEDTHEOVERALLSTOCKERSTRUCTUREANDFOUNDTHATTHESCREWSLOOSENEDONTHEFIRSTLAYEROFLEFTCASSETTESFLANGEWITHTRELLISJOINT,THECONDITIONWASTHESAMEWITHEXPERIMENTINPAFOR500GALFURTHER,DUETOSEVERESQUEEZE,THEMETALSTOPPERWITHRUBBERCUSHIONEDMATERIALWASFRACTUREDATTHEJOIN232ANALYZEDTHEFREQUENCYMEASURINGWITHWHITENOISEFOLLOWINGTHEEXPERIMENTOF400GALAND600GAL,FREQUENCYMEASURINGWITHWHITENOISEWASANALYZEDITWASPAFOR50GAL,AND150HZTHEPURPOSEOFFREQUENCYMEASURINGWITHWHITENOISEWASTOOBSERVESTORAGESPACESAFTER400GALANDTHE600GALLIMITTESTSOFCOPYRIGHT2013SCIRESOJERJCWANGETAL51CASSETTEANDPVCBOARDSSTOCKERCONCRETEFRAMESTOCKERBASESHAKETABLEFIGURE5THECONFIGURATIONOFOVERALLEXPERIMENTALSTOCKERSTRUCTUREFIGURE6THETWOFORMSOFMCNYLONSTOPPERWEREINSTALLEDINCASSETTETHERIGHTSIDECSTREFERREDTORCST,THELEFTSIDECSTREFERREDTOLCSTSTOCKERTOINVESTIGATEWHETHERORNOTTHEFREQUENCYOFSTOCKERSTRUCTUREWASREDUCEDTHEMETHODWASUSEDTOCHECKWHETHERTHEINTERNALMATERIALCAUSEDMATERIALDAMAGEORLOOSENATTHEJOINTBYTHEEXPERIMENTITMAYALSODETERMINEWHETHERTHEEXPERIMENTALSPECIMENSDAMAGEORNOTTHERESULTSSHOWEDTHATUNDERTHESHOCKWAVEINPA400GALAND600GAL,COMPARINGTOTHEFREQUENCYOFTHESPECIMENAFTERANDBEFORETHEEXPERIMENT,THEFREQUENCYOFLENGTHAXLEYAXLEWASREDUCEDAPPROXIMATELY20THETEAMSPECULATEDTHEREASONTOBETHEGRAVITYPOSITIONOFTHEOVERALLSTOCKERSCENTERWASNOTLOCATEDATTHECENTEROFMASSPOSITIONITMAYDUETOTHELARGEAMOUNTOFFFUFANSLOCATEDBEHINDTHECASSETTESTHEFANSCAUSEDVIOLENTLYTORSIONINTHECOURSEOFTHEEXPERIMENTWHICHLEDTOTHEYAXLEOFTHESTRUCTUREDESTROYED24SUMMARYTHERESULTSOFTHEEXPERIMENTSHOWEDTHATLOWSTIFFNESSOFSTOCKERSTORAGESPACESTENDSTOBEVIOLENTLYANDSTRUCTURALLYDISPLACEDCONSEQUENTLY,ITLEDTOLARGENUMBEROFPVCBOARDSDARTEDOUTOFTHECASSETTESINREALCONDITIONOFTHEHIGHTECHFACTORY,THECASSETTESAREUSEDTOSTORELARGESEMIFINISHEDORFINISHEDGLASSTHEREFORE,IFTHEGLASSWASDAMAGEDBYSHOCKS,ITWASCONSIDEREDATYPEOFDESTRUCTIONTHERESULTOFFREQUENCYMEASURINGWIT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