EIA-3628E電子連接器振動(dòng)測(cè)試方法-中英

電子連接器振動(dòng)測(cè)試方法(￡1人-364-28￡).圉庭TOC\o"1-5"\h\zVIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKETS一CONTENTS目錄Introduction簡(jiǎn)介1-2Scope范圍1-2Object主旨1-2Definitions定義1-2Testresources測(cè)試程序2-3Testspecimen測(cè)試樣品3-3Testprocedure測(cè)試程序4-4TestconditionsI,II,IIIandIV4-4TestconditionsV,VIandVII測(cè)試條件V、VI和VII4-10Detailstobespecified細(xì)節(jié)規(guī)定5-15Testdocumentation測(cè)試報(bào)告6-16Table1Vibrationconditions5ValuesfortestconditionV13ValuesfortestconditionVI14ValuesfortestconditionVII15Figure1Mountingaxisdefinitions3Vibrationtestcurves-highfrequency(displacementinmm)7Vibrationtestcurves-highfrequency(displacementininches)8TestconditionV,randomvibrationtestcurveenvelope12TestconditionVI,randomvibrationtestcurveenvelope13TestconditionVII,randomvibrationtestcurveenvelope14VIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKETSIntroduction簡(jiǎn)介Scope范圍Thestandardtestproceduredetailsamethodtoassesstheabilityofelectricalconnectorcomponentstowithstandspecifiedseveritiesofvibration.此試驗(yàn)標(biāo)準(zhǔn)詳述了一種用于電子連接器振動(dòng)試驗(yàn)的標(biāo)準(zhǔn)方法，用以評(píng)估電子連接器及其組件承受特定強(qiáng)度振動(dòng)的能力。Object主旨Theobjectofthistestistodeterminetheeffectsofvibrationwithinthepredominantorrandomvibrationfrequencyrangesandmagnitudesthatmaybeencounteredduringthelifeoftheconnector.此試驗(yàn)的是用來(lái)模擬產(chǎn)品在使用過(guò)程中可能遭受到的主要頻段或隨機(jī)振動(dòng)頻段范圍內(nèi)及其振動(dòng)幅度的環(huán)境，以此驗(yàn)證對(duì)產(chǎn)品性能的影響情況.Definitions定義Axis軸向Thefollowingmountingaxisdefinitionsshallbeemployedduringtheperformanceofthistest.Figure1indicatesapictorialviewoftheaxisdefinitions.Thereferencingdocumentshallindicatethefixturingrequiredortheaxisdefinitionsifdifferentthanasstatedinfigure1.Axisdefinitionsforsymmetrical,squareandafree”connectorsshallbedefinedSpecifeattatail在執(zhí)行振動(dòng)測(cè)試時(shí)，軸向需明確定義清楚。圖1標(biāo)示了各軸向的定義。若實(shí)際測(cè)試所使用的軸向與圖1不同，則在相關(guān)參考文件中需對(duì)試驗(yàn)裝置要求及軸向進(jìn)行定義。對(duì)于具有對(duì)稱性，方形及不規(guī)則的連接器的軸向的定義也要在規(guī)范細(xì)目中詳加定義。X-axisX-軸Alongthelongitudinallengthofthetestsample沿著試件的縱向長(zhǎng)度方向。Y-axisY-軸Theaxisperpendiculartothelongitudinallengthofthesample(transversedirection).垂直于試件縱向長(zhǎng)度的方向(橫向方向)。Z-axisZ-軸Theaxisperpendiculartothefixtureseatingplaneattachedtothetesttable.垂直于固定治具的測(cè)試平臺(tái)的方向Thetermgn術(shù)語(yǔ)gnThistermistheSIunitforthestandardaccelerationduetotheearth,sgravity,whichitselfvarieswithaltitudeandgeographiclatitude.gn是國(guó)際單位，表示標(biāo)準(zhǔn)的重力加速度，其本身隨著高度和地理位置而變化。NOTE—Inthisstandardthevalueofgnis9.81m/s2.備注：在這個(gè)標(biāo)準(zhǔn)中g(shù)n取9.81m/s2Testresources測(cè)試程序Equipment設(shè)備Themonitoringtransducershallbecalibratedagainstastandardtransducerhavinganaccuracyof±2%.Thevibrationsystemconsistingofthevibrationmachine,togetherwithitsauxiliarytestequipment,shallbecapableofgeneratingeitherasinusoidalorrandomexcitation.傳感器需由標(biāo)準(zhǔn)傳感器(精度在±2%以內(nèi))進(jìn)行校準(zhǔn)。振動(dòng)系統(tǒng)包含有振動(dòng)機(jī)及輔助測(cè)試設(shè)備，整個(gè)系統(tǒng)應(yīng)能產(chǎn)生正弦或隨機(jī)振動(dòng)。TestequipmentforrandomvibrationshallproducerandomexcitationthatpossessesaGaussian(normal)amplitudedistribution,exceptthattheaccelerationmagnitudesofthepeakvaluesmaybelimitedtoaminimumofthreetimestherms[three-sigma(3a)limits].用于隨機(jī)振動(dòng)的測(cè)試設(shè)備所產(chǎn)生的隨機(jī)振動(dòng)的振動(dòng)幅度應(yīng)符合高斯分布，但加速度的峰值可限止到最小為3倍的均方根值(區(qū)間為3。)。Testspecimen測(cè)試樣品Avibrationtestsampleshallbeafullywiredconnectorconsistingofoneofthefollowing,asapplicable;振動(dòng)試驗(yàn)的樣品應(yīng)是完全連接好連接器，且包括下列條件中任一條適用的條件：Aconnectorpluganditsmatingconnectorreceptacle.連接器的公頭及與其相對(duì)應(yīng)的母頭；Aprintedcircuitconnectorreceptacleanditsmatingconnectorboard(s).印刷電路板及與其相對(duì)應(yīng)的連接器；電子連接器振動(dòng)測(cè)試方法（￡1人-364-28￡）.圉庭VIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKET^」Anintegral,functionalconnectorassembly.已裝配好且具完整功能的組合件。Eachtestsampleshallbepreparedwithwireandothermaterialsorprocesses,simulatingapplicationassemblyofthesample.Ifnormalconnectormatingisdependentuponforcesexternaltotheconnector,thensuchforcesandmountingarrangementshallbeascloselyduplicatedaspossible（example:printedcircuitconnectors）.Ifmatingisachievedwithnormallockingmeans,thenonlynormallockingmeansshallbeused.每一試驗(yàn)樣品都應(yīng)準(zhǔn)備好導(dǎo)線及其它材料，或作好模擬連接器的現(xiàn)場(chǎng)組裝等工作。若連接器的連接方式需要依靠外力，那么這些外力與連接方式應(yīng)盡可能模擬實(shí)際的狀況（例如：印刷電路連接器）。若是通過(guò)的鎖扣方式連接，那么也需采用相同的方式連接。Methodofmounting安裝方法TestconditionsI,II,IIIandIV（sinusoidalevaluationconditions）試驗(yàn)條件I，II，III和試驗(yàn)條件IV（正弦振動(dòng)測(cè)試條件）Thespecimenshallbeattachedtoafixturecapableoftransmittingthevibrationconditionsspecified.Thetestfixtureshallbedesignedsothatresonantvibrationinherentinthefixturewithinthefrequencyrangespecifiedforthetestshallbeminor.Themagnitudeoftheappliedvibrationshallbemonitoredonthetestfixturenearthespecimenmountingpoints.Thetestspecimenshallbemountedrigidlytothetestfixtureasspecifiedandshallsimulateascloselyaspossiblethenormalmountingofthespecimen.Aminimumof200mm（approx8in）ofwireorcableshallbeunsupportedonbothendsoftheconnector.Forspecimenswithattachedbrackets,oneofthevibration-testdirectionsshallbeparalleltothemountingsurfaceofthebracket.Vibrationinputshallbemonitoredonthemountingfixtureintheproximityofthesupportpointsofthespecimen.連接器試驗(yàn)樣品應(yīng)固定到能傳遞規(guī)定振動(dòng)條件的夾具上，夾具的設(shè)計(jì)應(yīng)能保證它的固有共振頻率在試驗(yàn)所規(guī)定的頻率范圍內(nèi)達(dá)到最小。在試驗(yàn)夾具上接近樣品的地方監(jiān)控所施加的振動(dòng)強(qiáng)度。樣品安裝應(yīng)盡可能模擬實(shí)際使用狀況。在連接器尾端至少有200毫米（約8英寸）長(zhǎng)的導(dǎo)線末被固定。對(duì)于帶有安裝托架的樣品，振動(dòng)試樣的一個(gè)方向應(yīng)平行于托架的安裝面。在靠近樣品支撐點(diǎn)的地方監(jiān)控振動(dòng)輸入。TestconditionsV,VIandVII（randomexcitationconditions）試驗(yàn)條件V，VI和VII（隨機(jī)振動(dòng)測(cè)試條件）Thespecimenshallbemountedasspecified.Theorientationofthespecimenordirectionofapplicationoftheappliedvibrationmotionshallbespecifiedinoneormoredirections.Iftheorderofapplicationofthedifferentdirectionsiscritical,italsoshallbespecified.Anyspecialtestfixturesorjigsrequiredtorunthetestshallbespecifiedinsufficientdetailtoassurereproducibilityoftheinputmotionappliedtothespecimen.Thesedetailsshallincludethedimensions,thematerials,temper,etc.,asapplicable.按規(guī)定的方法安裝樣品，試驗(yàn)樣品的位置或施加振動(dòng)的方向應(yīng)規(guī)定朝一個(gè)或一個(gè)以上的方向。如果朝不同方向施加的次序很重要，那就應(yīng)該規(guī)定不同方向的先后順序。對(duì)于進(jìn)行試驗(yàn)所要求的任何特殊試驗(yàn)夾具或機(jī)架應(yīng)充分詳細(xì)規(guī)定，以保證施加到樣品的輸入量具有重復(fù)性，這些詳細(xì)的規(guī)定包括尺寸、材料和溫度等。Testprocedure測(cè)試程序Testsandmeasurementsbefore,duringandaftervibrationshallbeasspecifiedinthereferencingdocument.應(yīng)在相關(guān)的參考文件中規(guī)定振動(dòng)之前，之中或之后的各種測(cè)試項(xiàng)目。TestconditionsI,II,IIIandIV測(cè)試條件i、n、in、wVIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKETS—"Electricalloadanddiscontinuity電負(fù)載及其不連續(xù)性Unlessotherwisespecifiedinthereferencingdocument,theelectricalloadconditionshallbe100milliamperes,maximumforallcontacts.除非另有規(guī)定，施加電負(fù)載時(shí)，通過(guò)端子的電流最大不得超過(guò)100mA。Unlessotherwisespecifiedinthereferencingdocument,nodiscontinuitiesofonemicrosecondorgreaterdurationareallowed.Adetectorcapableofdetectingthespecifieddiscontinuityshallbeused.除非另有規(guī)定，試驗(yàn)過(guò)程中應(yīng)使用合適的儀器來(lái)監(jiān)控電路的電氣不連續(xù)性,不允許出現(xiàn)大于1^s的斷路現(xiàn)象。Vibrationconditions振動(dòng)條件Vibrationconditionsshallbeinaccordancewithtable1,asapplicable.表1列出適用的振動(dòng)條件。Table1-VibrationconditionsTestconditionsFrequencyrange,HzPeaklevelgum/s2ILow-10to55IIHigh-10to5001098.1IIIHigh-10to2,00015147.1IVHigh-10to2,00020196.1Resonance共振Acriticalresonantfrequencyisthatfrequencyatwhichanypointonthespecimenisobservedtohaveamaximumamplitudemorethantwicethatofthesupportpoints.Whenspecified,resonantfrequenciesshallbedeterminedeitherbymonitoringparameterssuchascontactopening,orbyuseofresonance-detectinginstrumentation.所謂的臨界共振頻率是指在該頻率時(shí)觀測(cè)到的試驗(yàn)樣品上任一點(diǎn)的最大振幅將比支撐點(diǎn)的振幅的2倍還要大.當(dāng)有規(guī)定時(shí)，共振頻率應(yīng)采用監(jiān)控參數(shù)的方法，或采用共振檢測(cè)儀的方法來(lái)確定共振頻率。TestconditionI測(cè)試條件IThespecimensshallbesubjectedtoasimpleharmonicmotionhavinganamplitude1.52mm(0.06in)doubleamplitude(maximumtotalexcursion),thefrequencybeingvarieduniformlybetweentheapproximatelimitsof10Hzand55Hz.Theentirefrequencyrange,from10Hzto55Hzandreturnto10Hz,shallbetraversedinapproximately1minute.Unlessotherwisespecified,thismotionshallbeappliedfor2hoursineachofthreemutuallyperpendiculardirections(totalof6hours).Ifapplicable,thistestshallbemadeunderelectricalloadconditions.樣品承受振幅為1.52mm(P-P)的簡(jiǎn)諧振動(dòng)，其頻率在10至55Hz之間均勻變化，整個(gè)頻率范圍內(nèi)(從10至55,再?gòu)?5至10)約歷時(shí)1分鐘.除非另有規(guī)定，在相互垂直的三個(gè)方法上各振動(dòng)2小時(shí)(總共6小時(shí)).如果適用,振動(dòng)應(yīng)在施加電負(fù)載的條件下進(jìn)行TestconditionII[98.1m/s2(10gn)peak]測(cè)試條件H【峰值：98.1m/s2(10gn)】Thespecimens,whiledeenergizedoroperatingundertheloadconditionsspecified,shallbesubjectedtothevibrationamplitude,frequencyrange,anddurationspecified,andand,respectively;seefigures2and3.VIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKETS—在沒(méi)有承受或承受規(guī)定電負(fù)載的情況下，樣品應(yīng)分別承受如、及所規(guī)定的振幅、頻率和時(shí)間的振動(dòng)，見圖2和圖3Amplitude振幅Thespecimensshallbesubjectedtoasimpleharmonicmotionhavinganamplitudeofeither1.52mm(0.06in)doubleamplitude(maximumtotalexcursion)or98.1m/s2(10gn)peak,whicheverisless.Thetoleranceonvibrationamplitudeshallbe±10%.樣品承受振幅為1.52mm(P-P)或峰值為10g的簡(jiǎn)諧振動(dòng)，在兩者之間選擇振幅較小的一個(gè)振幅的容許誤差為±10%.Frequency頻率Thevibrationfrequencyshallbevariedlogarithmicallybetweentheapproximatelimitsof10Hzand500Hz(see4.1.8)exceptthattheprocedure(see4.1.4)ofthisstandardmaybeappliedduringthe10Hzto55Hzbandofthevibrationfrequencyrange.振動(dòng)頻率在10至500Hz范圍內(nèi)近似作對(duì)數(shù)變化(見4.1.8)，但在10至55Hz范圍內(nèi)應(yīng)按4.1.4中所規(guī)定的程序進(jìn)行.Sweeptimeandduration掃描時(shí)間及持續(xù)時(shí)間Theentirefrequencyrangeof10Hzto500Hzandreturnto10Hzshallbetraversedin15minutes.Thiscycleshallbeperformed12timesineachofthreemutuallyperpendiculardirections(totalof36times),sothatthemotionshallbeappliedforatotalperiodofapproximately9hours.Interruptionsarepermittedprovidedtherequirementsforrateofchangeandtestdurationaremet.Completionofcyclingwithinanyseparatebandispermissiblebeforegoingtothenextband.Whentheprocedure(see4.1.4)isusedforthe10Hzto55Hzband,thedurationofthisportionshallbesameasthedurationforthisbandusinglogarithmiccycling(approximately1-1/3hoursineachofthreemutuallyperpendiculardirections).在整個(gè)頻率范圍內(nèi)(從10至500，再?gòu)?00至10)歷時(shí)15分鐘.在三個(gè)互相垂直的方向上各循環(huán)12次(總共36次)，因此整個(gè)試驗(yàn)過(guò)程歷時(shí)9小時(shí).只要能滿足振動(dòng)頻率及速度的變化和總的試驗(yàn)時(shí)間要求，就允許試驗(yàn)間斷進(jìn)行.只有在一個(gè)頻段內(nèi)完成循環(huán)后,才允許進(jìn)入下一頻段.在10至55Hz范圍內(nèi),按照4.1.4的程序進(jìn)行振動(dòng)時(shí),這一頻段持續(xù)的時(shí)間與采用對(duì)數(shù)循環(huán)的時(shí)間相同(在三個(gè)互相垂直的每一個(gè)方向約1.33小時(shí)).TestconditionIII147.1m/s2(15gn)peak］測(cè)試條件III【峰值：147.1m/s2(15gn)】Thespecimens,whiledeenergizedoroperatingundertheloadconditionsspecified,shallbesubjectedtothevibrationamplitude,frequencyrange,anddurationspecifiedin,and,respectively;seefigures2and3.在沒(méi)有承受或承受規(guī)定電負(fù)載的情況下，樣品承受如、及所規(guī)定的振幅、頻率及時(shí)間的振動(dòng)(如圖2和圖3所示)。VIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKETS一二口；…川Inr一二口；…川InrZNOTE:TestCondhionIIendsat5OQHz,TestConditionsIIIandIVerdat2QQ0Hz,Frequency(Hz)NOTE:s=0.0020ILDA(f=fiequencyinhertz,DA=doubleamplitudeinimn)-Vibrationtestcmves-highfrequency(displacementiumm)

VIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKETS:.中[--MH二_曰三NOTE:TestCondtllonIIendsat500Hl

TestCondklonsEflandIVendat2QQ0Hz.ttprl一一aUJE至qnop)CONDITIONHIISOn100500ttprl一一aUJE至qnop)CONDITIONHIISOn100500Frequency(Hz)2000tooqoNOTE:曰=0.0512flDA(f=fiequencyinheitz,DA=doubleamplitudeininches)-Vibrationtestcurves-highfiequency(displacemeutininches)Amplitude振幅Thespecimensshallbesubjectedtoasimpleharmonicmotionhavinganamplitudeofeither1.52mm(0.06in)doubleamplitude(maximumtotalexcursion)or147.1m/s2(15gn)peak,whicheverisless.Thetoleranceonvibrationamplitudeshallbe±10%.樣品承受振幅為1.52mm(P-P)或峰值為15g的簡(jiǎn)諧振動(dòng)，在兩者之間選擇振幅較小的一個(gè).振幅的容許誤差為±10%.。Frequencyrange頻率Thevibrationfrequencyshallbevariedlogarithmicallybetweentheapproximatelimitsof10Hzto2,000Hz(see4.1.8)exceptthattheprocedure(see4.1.4)ofthisstandardmaybeappliedduringthe10Hzto55Hzbandofthevibrationfrequencyrange.振動(dòng)頻率在10至2000Hz范圍內(nèi)近似作對(duì)數(shù)變化(見4.1.8),但在10至55Hz范圍內(nèi)應(yīng)按4.1.4中所規(guī)定的程序進(jìn)行。Sweeptimeandduration掃描時(shí)間及持續(xù)時(shí)間Theentirefrequencyrangeof10Hzto2,000Hzandreturnto10Hzshallbetraversedin20minutes.Thiscycleshallbeperformed12timesineachofthreemutuallyperpendiculardirections(totalof36times),sothatthemotionshallbeappliedforatotalperiodofapproximately12hours.Interruptionsarepermittedprovidedtherequirementsforrateofchangeandtestdurationaremet.Completionofcyclingwithinanyseparatebandispermissiblebeforegoingtothenextband.Whentheprocedure(see4.1.4)ofthisstandardisusedforthe10Hzto55Hzband,thedurationofthisportionshallbethesameasthedurationforthisbandusinglogarithmiccycling(approximately1-VIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKETS—1/3hoursineachofthreemutuallyperpendiculardirections).在整個(gè)頻率范圍內(nèi)(從10至2000，再?gòu)?000至10)歷時(shí)20分鐘。在三個(gè)互相垂直的方向上各循環(huán)12次(總共36次)，因此整個(gè)試驗(yàn)過(guò)程歷時(shí)12小時(shí).只要能滿足振動(dòng)頻率及速度變化和總的試驗(yàn)時(shí)間要求，就允許試驗(yàn)間斷進(jìn)行.只有在一個(gè)頻段內(nèi)完成循環(huán)后，才允許進(jìn)入下一頻段.在10至55Hz范圍內(nèi)，按照4.1.4的程序進(jìn)行振動(dòng)時(shí)，這一頻段持續(xù)的時(shí)間與采用對(duì)數(shù)循環(huán)的時(shí)間相同(在三個(gè)互相垂直的每一個(gè)方向約1.33小時(shí))。TestconditionIV[196.1m/s2(20gn)peak]測(cè)試條件W【峰值：196.1m/s2(20gn)】Thespecimens,whiledeenergizedoroperatingundertheloadconditionsspecified,shallbesubjectedtothevibrationamplitude,frequencyrange,anddurationspecifiedin,and,respectively;seefigures2and3.在沒(méi)有承受或承受規(guī)定電負(fù)載的情況下，樣品承受如、及所規(guī)定的振幅、頻率及時(shí)間的振動(dòng)(如圖2和圖3所示)。Amplitude振幅Thespecimensshallbesubjectedtoasimpleharmonicmotionhavinganamplitudeofeither1.52mm(0.06in)doubleamplitude(maximumtotalexcursion)or196.1m/s2(20gn)peak,whicheverisless.Thetoleranceonvibrationamplitudeshallbe±10%.樣品承受振幅為1.52mm(P-P)或峰值為20g的簡(jiǎn)諧振動(dòng)，在兩者之間選擇振幅較小的一個(gè).振幅的容許誤差為±10%。Frequencyrange頻率Thevibrationfrequencyshallbevariedlogarithmicallybetweentheapproximatelimitsof10Hzto2,000Hz(see4.1.8).振動(dòng)頻率在10至2000Hz范圍內(nèi)近似作對(duì)數(shù)變化(見4.1.8)，但在10至55Hz范圍內(nèi)應(yīng)按4.1.4中所規(guī)定的程序進(jìn)行。Sweeptimeandduration掃描時(shí)間及持續(xù)時(shí)間Theentirefrequencyrangeof10Hzto2,000Hzandreturnto10Hzshallbetraversedin20minutes.Thiscycleshallbeperformed12timesineachofthreemutuallyperpendiculardirections(totalof36times),sothatthemotionshallbeappliedforatotalperiodofapproximately12hours.Interruptionsarepermittedprovidedtherequirementsforrateofchangeandtestdurationaremet.在整個(gè)頻率范圍內(nèi)(從10至2000,再?gòu)?000至10)歷時(shí)20分鐘，在三個(gè)互相垂直的方向上各循環(huán)12次(總共36次)，因此整個(gè)試驗(yàn)過(guò)程歷時(shí)12小時(shí)。只要能滿足振動(dòng)頻率及速度變化和總的試驗(yàn)時(shí)間要求，就允許試驗(yàn)間斷進(jìn)行。Completionofcyclingwithinanyseparatebandispermissiblebeforegoingtothenextband.Whentheprocedure(see4.1.4.)ofthisstandardisusedforthe10Hzto55Hzband,thedurationofthisportionshallbethesameasthedurationforthisbandusinglogarithmiccycling(approximately11/3hoursineachofthreemutuallyperpendiculardirections).只有在一個(gè)頻段內(nèi)完成循環(huán)后，才允許進(jìn)入下一頻。在10至55Hz范圍內(nèi)，按照4.1.4的程序進(jìn)行振動(dòng)時(shí)，這一頻段持續(xù)的時(shí)間與采用對(duì)數(shù)循環(huán)的時(shí)間相同(在三個(gè)互相垂直的每一個(gè)方向約1.33小時(shí))。Alternativeprocedureforuseoflinearinplaceoflogarithmicchangeoffrequency頻率的線性變化代替對(duì)數(shù)變化Linearrateofchangeoffrequencyispermissibleunderthefollowingconditions:在下列條件下，可用頻率的線性變化代替對(duì)數(shù)變化。Thefrequencyrangeabove55Hzshallbesubdividedintonofewerthanthreebands.Theratioofthemaximumfrequencytotheminimumfrequencyineachbandshallbenotlessthantwo(2).55Hz以上的頻率范圍應(yīng)再細(xì)分為不少于3個(gè)頻率.在每一頻段里，最高頻率與最低頻率之比不小于2。TherateofchangeoffrequencyinHzperminuteshallbeconstantwithinanyoneband.在每一頻段內(nèi)，頻率的變化速率(Hz/分鐘)應(yīng)是恒定的。VIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKETSTheratiosoftherateofchangeoffrequencyofeachbandtothemaximumfrequencyofthatbandshallbeapproximatelyequal.每一頻段的頻率變化率與該段的最高頻率的比值應(yīng)大致相等。Exampleofalternativeprocedure替代程序舉例Asanexampleofthecomputationofratesofchange,assumethatthefrequencyspectrumhasbeendividedintothreebands,55Hzto125Hz,125Hzto500Hzand500Hzto2,000Hz,inaccordancewith.Foreachband,lettheconstant,k,representthefrequencychange(inHz/minute),dividedbythemaximumfrequency(inHz).Thentheratesofchangeforthethreebandswillbe125k,500kand2,000k,respectively.Thetimes(inminutes)totraversethethreefrequencybandsare55500-125,2,000-500,and

125K500K2.000kSincetheniiiiiniumtotalsweeptimeis30minutes.whencek=0.0687/minute.Therequiredmaximumconstantratesoffrequencychangeforthethreebandsaretherefore8.55Hzperminute,34.2Hzperminuteand137Hzperminute,respectively.Theminimumtimesoftraverseofthebandsare8.2min,10.9minand10.9min,respectively.按照的規(guī)定，假設(shè)將整個(gè)頻段分為55至125,125至500,500至2000Hz三個(gè)頻段.在每一頻段,令頻率的變化率與該段頻段的最高頻率之比值為憶則三個(gè)頻段的頻率變化率分別為125k、500k及2000k，各頻段經(jīng)歷的時(shí)間分別為（125-55）/（125k）、（500-125）/（500k）和（2000-500）/（2000k）。因?yàn)榭偟膾呙钑r(shí)間為30分鐘，因此可求出k=0.0687/分鐘。三個(gè)頻段的頻率變化率分別為8.55Hz/分鐘、34.2Hz/分鐘和137Hz/分鐘，經(jīng)過(guò)三個(gè)頻段的時(shí)間分別為8.2分鐘、10.9分鐘和10.9分鐘.TestconditionsV,VIandVII測(cè)試條件V、VI和VIIControlandanalysisofrandomvibration隨機(jī)振動(dòng)的控制及分析Spectraldensitycurves頻譜密度曲線Theoutputofthevibrationmachineshallbepresentedgraphicallyaspower-spectraldensityversusfrequency;see.1.Thespectral-densityvaluesshallbewithin+40%and-30%(±1.5dB)ofthespecifiedvaluesbetweenalower-specifiedfrequencyand1,000Hz,andwithin+100%and-50%(±3dB)ofthespecifiedvaluesbetween1,000andanupper-specifiedfrequency(2,000Hz).Afilterbandwidthwillbeamaximumof1/3-octaveorafrequencyof25Hz,whicheverisgreater.以功率頻譜密度與頻率的關(guān)系來(lái)表示振動(dòng)試驗(yàn)機(jī)的輸出（見.1）.頻率位于下限頻率與1000Hz之間時(shí)，頻譜密度的值應(yīng)介于規(guī)定值的+40%和-30%以內(nèi)（±1.5dB）.頻率位于1000Hz與上限頻率（2000Hz）之間時(shí)，頻譜密度應(yīng)介于規(guī)定值的+100%和-50%以內(nèi)（±3dB）。濾波器的帶寬是最大的1/3倍頻程或者25Hz，選擇其中較大的為頻寬。Power-spectraldensity功率頻譜密度Power-spectraldensityisthemean-squarevalueofanoscillationpassedbyanarrow-bandfilterperunit-filterbandwidth.Forthisapplicationitisexpressedasg2/f,whereg2/fisthemeansquarevalueofaccelerationexpressedingravitationalunitspernumberofcyclesoffilterbandwidth.Thespectraldensitycurvesareusuallyplottedeitheronalogarithmicscale,orinunitsofdecibels(dB).Thenumberofdecibelsisdefinedbytheequation:

VIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKETSdB=10log—SrThermsvalueofaccelerationwithinafrequencybandbetweenf1andf2is:--il/2J-fdffiwheregr2/fisagivenreferencevalueofpower-spectraldensity,usuallythemaximumspecifiedvalue.功率頻譜密度是窄帶濾波器每一單位濾波帶寬所通過(guò)的振動(dòng)的均方值，即g2/f.也就是濾波器帶寬的每一次循環(huán)周期中所通過(guò)的以重力單位表示的加速度均方值.頻譜密度曲線通常以對(duì)數(shù)坐標(biāo)或以分貝(dB)為單位作曲線.分貝的定義如下：dB=10Log[(g2/f)/(gr2/f)]在頻段fl至f2頻段內(nèi)，加速度的均方根值g=/[g2/f]i/2(積分上限為f，積分下限為fi),gr2/f為給定的參考頻譜密度，通常為所給定的最大值。2Distributioncurves曲線分布Aprobabilitydensity-distributioncurvemaybeobtainedandcomparedwithaGaussiandistributioncurve.Theexperimentally-obtainedcurveshallnotdifferfromthegaussiancurvebymorethan±10%ofthemaximumvalue.得到一條概率密度分布曲線，并與高斯分布曲線對(duì)比，實(shí)驗(yàn)所得的密度分布曲線與高斯分布曲線相差最大不得超過(guò)±10%。Monitoring監(jiān)控Monitoringinvolvesmeasurementsofthevibrationexcitationandofthetestitemperformance.Whenrequiredinthereferencingdocument,thespecimenmaybemonitoredduringthetest.Thedetailsofthemonitoringcircuit,includingthemethodandpointsofconnectiontothespecimen,shallbespecified.監(jiān)控包括振動(dòng)的激勵(lì)和試驗(yàn)樣品特性的測(cè)試。相關(guān)文件中應(yīng)規(guī)定監(jiān)控電路的細(xì)節(jié)，如連接試驗(yàn)樣品的方法及連接點(diǎn)等。Vibrationinput振動(dòng)輸入Thevibrationmagnitudeshallbemonitoredonavibrationmachine,onmountingfixtures,atlocationsthatareasnearaspracticabletothetestitemmountingpoints.Whenthevibrationinputismeasuredatmorethanonepoint,theminimuminputvibrationshallnormallybemadetocorrespondtothespecifiedtestcurve;seefigures4and5.Formassivetestitemsandfixtures,andforlargeforceexcitersormultiplevibrationexciters,theinputcontrolvaluemaybeanaverageoftheaveragemagnitudesofthreeormoreinputs.Accelerationsinthetransversedirection,measuredatthetestitemattachmentpoints,shallbelimitedto100%oftheappliedvibration.Thenumberandlocationofthetestpointsshallbespecified.應(yīng)該監(jiān)控振動(dòng)試驗(yàn)機(jī)和安裝夾具的振動(dòng)幅度，監(jiān)測(cè)位置應(yīng)盡可能靠近試驗(yàn)樣品的安裝點(diǎn)。當(dāng)在一個(gè)以上的點(diǎn)測(cè)量振動(dòng)輸入時(shí)，應(yīng)使最小的振動(dòng)輸入符合試驗(yàn)曲線的規(guī)定(見圖4和圖5)。對(duì)于大重量的樣品和夾具，以及強(qiáng)力激勵(lì)和復(fù)式振動(dòng)激勵(lì)器，輸入控制值可以取三個(gè)或三個(gè)以上的輸入平均幅度的平均值，在試驗(yàn)樣品連接點(diǎn)上測(cè)得的橫向加速度應(yīng)限制在所施加振動(dòng)量的100%以內(nèi)，同時(shí)應(yīng)規(guī)定試驗(yàn)點(diǎn)的位置和數(shù)量。4.2.2Procedure試驗(yàn)程序Thespecimen,orsubstituteequivalentmass,shallbemountedinaccordancewith3.3.2andthemonitoringequipmentattached,ifapplicable,inaccordancewith.ThevibrationmachineshallthenbeoperatedandequalizedorcompensatedtodelivertherequiredfrequenciesandintensitiesconformingtothecurvesspecifiedintestconditionV,figure4,ortestconditionVI,figure5,ortestconditionVII,figure6(see2.1).Thespecimenshallthenbesubjectedtothevibrationspecifiedbythetestconditionletter(seetables2,3and4)forthedurationasspecified:Ineachofthreemutuallyperpendiculardirections,andintheorderspecified（see3.3.2）,asapplicable.樣品應(yīng)3.3.2的規(guī)定安裝，并按的規(guī)定連接監(jiān)控設(shè)備。然后開動(dòng)或平衡或校準(zhǔn)振動(dòng)試驗(yàn)機(jī)，以便傳遞規(guī)定的振動(dòng)頻率和強(qiáng)度（條件V或VI或VII，見圖4或圖5或圖6）。最后將試驗(yàn)樣品按規(guī)定的時(shí)間和方向承受試驗(yàn)條件（見表2或表3或表4）。三個(gè)互相垂直的每一方向上振動(dòng)的振動(dòng)時(shí)間按規(guī)定為以下四種：3minutes;3分鐘15minutes;15分鐘1-1/2hours;1.5小時(shí)or8hours;8小時(shí)Themeasurementsmadebefore,during,andafterthetestshallbespecifiedandifthespecimenistobemonitoredduringthetest,thedetailsshallbeinaccordancewith.試驗(yàn)前后或試驗(yàn)過(guò)程中應(yīng)按規(guī)定進(jìn)行相關(guān)測(cè)試，如在測(cè)試過(guò)程中需要特定性能的監(jiān)控則按的規(guī)定。4.2.3Electricalloadanddiscontinuities電負(fù)載和電氣不連續(xù)性Unlessotherwisespecifiedinthereferencingdocument,theelectricalloadconditionsshallbe100milliamperesforallcontacts.除非另有規(guī)定，接觸件通過(guò)的電流應(yīng)均為100mA，并且試驗(yàn)過(guò)程中不允許出現(xiàn)大于1us的斷路現(xiàn)象。Unlessotherwisespecifiedinthereferencingdocument,nodiscontinuitiesofonemicrosecondorgreaterdurationareallowed.Adetectorcapableofdetectingthespecifieddiscontinuityshallbeused.除非另有規(guī)定，試驗(yàn)過(guò)程中不允許出現(xiàn)大于1Us的斷路現(xiàn)象。測(cè)試中需采用能滿足測(cè)試精度要求的瞬斷儀。00050052*?2100Nsextmuap00050052*?2100Nsextmuap一eiuadsJ3M0ELUPPERTOLERANCELIMIT+1.54BSPECIFIEDCURVE100100。2000Frequency(Hz)Figure4-TestconditionV,randomvibrationtest-curveenvelope(seetable2).VIBRATIONTESTPROCEDUREFORELECTRICALCONNECTORSANDSOCKETS(NH/E6)fflioad啪」由MQd00,00,00,50,256.210.0.OJO5010010002000Frequency(Hz)+3dBUPPERTOLERANCELIMIT-6db/0CTAVEA+1.5dB「一SPECIFIEDCURVE-LOWERTOLERANCEUMIT(NH/E6)fflioad啪」由MQd00,00,00,50,256.210.0.OJO5010010002000Frequency(Hz)+3dBUPPERTOLERANCELIMIT-6db/0CTAVEA+1.5dB「一SPECIFIEDCURVE-LOWERTOLERANCEUMITFigure5-TestconditionVI,randomvibrationtest-curveenvelope(seetable3).Figure5-TestconditionVI,randomvibrationtest-curveenvelope(seetable3).Table2-Valuesfor