【astm標(biāo)準(zhǔn)】d 5112 - 98 (2015)_第1頁
已閱讀1頁，還剩3頁未讀， 繼續(xù)免費閱讀

下載本文檔

版權(quán)說明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請進(jìn)行舉報或認(rèn)領(lǐng)

文檔簡介

1、Designation:D5112?98(Reapproved2015)StardTestMethodfVibration(HizontalLinearMotion)TestofProducts1ThisstardisissuedunderthefixeddesignationD5112thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioni

2、nthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofresonance

3、sofunpackagedproductscomponentsbymeansofhizontallinearmotionappliedatthesurfaceonwhichtheproductismounted.FverticalvibrationtestingofproductsseeTestMethodD3580.Twoalternatetestmethodsarepresented:1.1.1TestMethodA—Resonan

4、ceSearchUsingSinusoidalVibration1.1.2TestMethodB—ResonanceSearchUsingRomVibration.NOTE1—Thesetwotestmethodsarenotnecessarilyequivalentmaynotproducethesameresults.1.2Thisinfmationmaybeusedtoexaminetheresponseofproductstov

5、ibrationfproductdesignpurposesfthedesignofacontainerinteripackagethatwillminimizetransptationvibrationinputsatthecriticalfrequencieswhentheseproductresonancesarewithintheexpectedtransptationenvironmentfrequencyrange.Sinc

6、evibrationdamageismostlikelytooccuratproductresonantfrequenciesthesemaybethoughtofaspotentialproductfragilitypoints.1.3Infmationobtainedfromtheoptionalsinusoidaldwellromtestmethodsmaybeusedtoassessthefatigueacteristicsof

7、theresonatingcomponentsfproductmodification.Thismaybecomenecessaryifaproduct’sresponsewouldrequiredesignofanimpracticalexcessivelycostlyshippingcontainer.1.4Thistestmethoddoesnotnecessarilysimulatevibrationeffectstheprod

8、uctwillencounterinoperatingenduseenvironments.Othermesuitabletestproceduresshouldbeusedfthispurpose.1.5ThevaluesstatedinSIunitsaretoberegardedasthestard.Thevaluesgiveninparenthesesarefinfmationonly.1.6Thisstarddoesnotpur

9、pttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.Fspecificprecautionary

10、statementsseeSection6.2.ReferencedDocuments2.1ASTMStards:2D996TerminologyofPackagingDistributionEnvironmentsD3580TestMethodsfVibration(VerticalLinearMotion)TestofProductsD4332PracticefConditioningContainersPackagesPackag

11、ingComponentsfTestingE122PracticefCalculatingSampleSizetoEstimateWithSpecifiedPrecisiontheAveragefaacteristicofaLotProcess2.2MilitaryStard:MILSTD810EMethod514Vibration33.Terminology3.1Definitions—Fdefinitionsoftermsusedi

12、nthistestmethodseeTerminologyD996.3.2DefinitionsofTermsSpecifictoThisStard:3.2.1decade—theintervaloftwofrequencieshavingabasicfrequencyratioof10(1decade=3.322octaves).3.2.2decibel(dB)—alogarithmicexpressionoftherelativev

13、aluesoftwoquantities.FrelativepowermeasurementsthedBvalueequals10timesthebase10logarithmoftheratioofthetwoquantitiesthatisdB=10log10[P1?P2].3.2.3hizontallinearmotion—motionoccurringessentiallyalongastraighthizontallinewi

14、thnosignificantverticaloffaxiscomponents.3.2.4meansquare—thetimeaverageofthesquareofthefunction.3.2.5octave—theintervaloftwofrequencieshavingabasicfrequencyratioof2(1octave=0.301decade).1Thistestmethodisunderthejurisdict

15、ionofASTMCommitteeD10onPackagingisthedirectresponsibilityofSubcommitteeD10.13onInteriPackaging.CurrenteditionapprovedApril12015.PublishedMay2015.iginallyapprovedin1990.Lastpreviouseditionapprovedin2009asD5112–98(2009).DO

16、I:10.1520D511298R15.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.3AvailablefromStardizationDoc

17、umentsderDeskBldg.4SectionD700RobbinsAve.PhiladelphiaPA191115094Attn:NPODS.Copyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates1observetheintericomponentsoftheproductduringtestingh

18、olesmaybecutinnoncriticalareasnoncriticalpanelsmayberemoved.9.Conditioning9.1Conditiontestspecimenspritotestingmaintaintheminaccdancewithanyspecificrequirementsapplicabletotheitembeingtested.Intheabsenceofotherspecificre

19、quirementsconditioninginaccdancewithPracticeD4332isrecommended(stardconditioningatmosphereof2362C(73.463.6F)5062%relativehuity).10.Procedure10.1Perfmthetestsintheconditionedenvironmentimmediatelyuponremovalfromthatenviro

20、nment.10.2Attachthetestspecimentothetestsurfaceoftheapparatusinamannerthatwillpreventthespecimenfromleavingmovingacrossthetestsurfaceduringvibration.Cautionisnecessarytoavoidmountingmethodsthatcauseexcessivestressstraint

21、hatcouldaltertheresponseoftheproduct.10.3Testintensitiesshallbesufficienttovibratetheproductataccelerationfrequencylevelsthatdetermineifproductresonancesexistintheexpectedfrequencyrangeofthetransptationenvironment.Typica

22、lproductsmayexhibitresonantfrequenciesrangingfrom1.0to100Hz.Accelerationlevelssufficienttoexciteresonancenmallyrangefrom0.1to0.5g.10.4SinusoidalVibration—TestMethodA:10.4.1anaccelerationlevelbetween0.10.5g(zerotopeak).Sw

23、eepthefrequencyrangefrom1to100Hzstartingat1Hzvaryingthefrequencyofthevibrationatacontinuouslogarithmicrateof0.5to1.0octavesminto100Hzbackto1Hzusingeitherautomaticmanualsweepwhilemaintaininganearlyconstantaccelerationleve

24、l.10.4.2anaccelerationlevelbetween0.10.5g(zerotopeak).Startingat1Hzvarythefrequencyofthevibrationatacontinuouslogarithmicrateof0.5to1.0octavesminto100Hzbackto1Hz.Recdanyresonantresponsesoftheproductrepeatingthecycleifnec

25、essary.NOTE3—Lowfrequencyvibrationrequiresalongstroke.Itmaybenecessarytoreducetheaccelerationlevelinputsatlowfrequenciesindertostaywithinthestrokecapabilitiesofthetestequipment.Thiscanbeaccomplishedbydividingthetestintot

26、womefrequencyrangeswithdifferentinputaccelerationlevels.Responselevelsfromdifferentinputaccelerationlevelsmayresultindifferenttransmissibilities.NOTE4—Frequenciesabovebelowthefrequencyrangefrom1.0to100Hzmaybenecessarydes

27、irablefsomeproducts.10.5RomVibration—TestMethodB:10.5.1StartthevibrationsystemsuchthatthePSDlevelsdonotovershootthedesiredspectrumduringstartup.Itisrecommendedthattestsbeinitiatedatleast6dBbelowfulllevelincrementedinonem

28、esubsequentstepstofulltestlevel.Operateatfulltestlevelfatimedurationlongenoughfthecontrolsystemtostabilizefthedatatobeaveragedsufficientlytorepresentstablespectrumshapeslevelsusually3minme.Thistimeisdependentupontheacter

29、isticsofthevibrationtestmachinecontrolsystemthesetuptheweightacteristicsofthetestspecimen.10.5.2Useaspectrumrepresentativeoftheexpectedtransptationenvironmentaflatbroadbspectrum.Itisrecommendedthattheminimumfrequencyrang

30、ebefrom1to100Hztheoverallgrmsbenotlessthan0.2thatthemaximumvariationinpowerspectraldensityoverthetotalfrequencyrangebe30dBless.Recdanyresonantresponsesoftheproduct.NOTE5—Spectrumshapeslevelsmaybeimptantduetoproductrespon

31、seswhicharenonlinearwithvariationsinamplitude.Fsomespecificproductenvironmentalcombinationshigherfrequencieshigheramplitudespectramayberequiredtoproduceobservableproductresonances.FanexampleseeMILSTD810.10.6Monittheaccel

32、erationfrequencydatasensedonthetestsurfacetoensurethatthedesiredtestconditionsareproduced.Mounttheaccelerometerinthedirectionofmotionascloseaspossibletothetestspecimeninalocationwhichproducesdatarepresentativeoftablemoti

33、on.10.7Monitthetestspecimenitscomponentsfanyresonantvibrations.Useastroboscopesenssreadoutsvisualaudityothermeansasapplicabletodeterminetheseresonances.Anyresonanceswithtransmissibilitiesof2greatermaybeconsideredsignific

34、ant.Fsinetestingthefrequencysweepmaybeinterruptedreversedifnecessaryfshttimeperiodsindertoproperlyidentifyaresonatingcomponent.10.8Recdthefrequenciesofanyresonancesidentifytheproductcomponentsthatareresonating.Fsinetesti

35、ngifdifferentfrequenciesarerecdedfeachresonatingcomponentontheupsweepascomparedtothedownsweep(atypicalsituation)recdbothfrequenciesthecrespondingsweepdirection.10.9Testtheproductineachofthepotentialshippingientationsofco

36、ncern.10.10OptionalSinusoidalDwellTest—Perfmasinusoidaldwelltestateachresonantfrequencyfoundin10.8ifitisdeterminedtobewithintheexpectedtransptationenvironmenttoexaminethefatigueacteristicsoftheresonatingcomponents.Dwellt

37、imeaccelerationleveldamagecriteriaaretobespecifiedbytheuser.Adjustthefrequencyofthevibrationasnecessarytomaintainresonance.NOTE6—Ifnodwelltimeisspecifiedatimeof15minateachresonantfrequencyisrecommended.10.11OptionalRomTe

38、st—Perfmaromvibrationtesttoexaminethefatigueacteristicsoftheresonatingcomponentstheinteractionbetweenthem.Testdurationromspectrumdamagecriteriaaretobespecifiedbytheuser.NOTE7—Ifnotestdurationisspecifiedatimeof30minisreco

溫馨提示

  • 1. 本站所有資源如無特殊說明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁內(nèi)容里面會有圖紙預(yù)覽，若沒有圖紙預(yù)覽就沒有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 眾賞文庫僅提供信息存儲空間，僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時也不承擔(dān)用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。

評論

0/150

提交評論