MIL-STD-1411 (NOTICE 1)
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MIL-STD-1411 (NOTICE 1), MILITARY STANDARD: INSPECTION AND MAINTENANCE OF COMPRESSED GAS CYLINDERS (04 MAY 1998)., MIL-STD-1411, including Change Notice 1, dated 8 September 1981, is hereby canceled without replacement.
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【英文标准名称】:Codeofpracticeforinstallationofelectricalandelectronicequipmentinships
【原文标准名称】:船舶上电气和电子设备安装的实施规则
【标准号】:BS8450-2006
【标准状态】:现行
【国别】:英国
【发布日期】:2006-07-26
【实施或试行日期】:2006-07-26
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:设计;发电机;配电;电击;电气设备;电气装置;电气安全;电气测试;电子设备及元件;防火安全;检验;装配;维修;安全措施;船舶;水路运输工程
【英文主题词】:
【摘要】:ThisBritishStandardgivesrecommendationsforthedesign,installationandmaintenanceofelectricalequipmentforthegeneration,storage,conversion,distributionandutilizationofelectricalenergyforallpurposesinshipsofalldescriptions,including,whererelevant,inlandandharbourcraft,butexcludingshipsofwar.NOTEForvesselssmallerthan500grtorwithalengthlessthan50m,IEC60092-507providesabasicstandardforsmallvesselelectricalinstallations,includingdirectcurrentsystemsnotexceeding50Vandalternatingcurrentsystemsnotexceeding250Vsinglephaseor500Vthreephase.Theserecommendationsareintendedtoprovidesatisfactoryoperationandsafety,especiallyfromfireandelectricalshock,ofinstalledequipmentandportableandtransportableequipmentwhichisintendedtobeconnectedtotheship’selectricaldistributionsystem.Theyrelateprincipallytorequirementsfortheinstallation,utilization,inspectionandtesting,butcertainrecommendationsfortheconstructionofelectricalandelectronicequipmentareincluded.ThisBritishStandardisnotapplicabletotheinternalwiringofmanufacturedapparatusthatisnotwiredonboard.Itisnotintendedtoprovideforeverycircumstance–thoseofaspecialcharactermayrequireappropriateadvice.
【中国标准分类号】:U60
【国际标准分类号】:47_020_60
【页数】:68P;A4
【正文语种】:英语
【英文标准名称】:Acoustics-Determinationofsoundabsorptioncoefficientandimpedanceinimpedancetubes-Part2:Transfer-functionmethod
【原文标准名称】:声学阻抗管中吸声系数和比阻抗率的测量第2部分:传递函数法
【标准号】:ISO10534-2-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-11
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC43
【标准类型】:()
【标准水平】:()
【中文主题词】:测定;声学;声音吸收;传输;声学测量;声学试验;吸声系数;建筑声学;吸声;声试验
【英文主题词】:Acousticabsorption;Acousticmeasurement;Acoustictesting;Acoustics;Buildingacoustics;Determination;Soundabsorption;Soundabsorptioncoefficient;Transmission
【摘要】:Thistestmethodcoverstheuseofanimpedancetube,twomicrophonelocationsandadigitalfrequencyanalysissystemforthedeterminationofthesoundabsorptioncoefficientofsoundabsorbersfornormalsoundincidence.Itcanalsobeappliedforthedeterminationoftheacousticalsurfaceimpedanceorsurfaceadmittanceofsoundabsorbingmaterials.Sincetheimpedanceratiosofasoundabsorptivematerialarerelatedtoitsphysicalproperties,suchasairflowresistance,porosity,elasticityanddensity,measurementsdescribedinthistestmethodareusefulinbasicresearchandproductdevelopment.ThetestmethodissimilartothetestmethodspecifiedinISO10534-1inthatitusesanimpedancetubewithasoundsourceconnectedtooneendandthetestsamplemountedinthetubeattheotherend.However,themeasurementtechniqueisdifferent.Inthistestmethod,planewavesaregeneratedinatubebyanoisesource,andthedecompositionoftheinterferencefieldisachievedbythemeasurementofacousticpressuresattwofixedlocationsusingwall-mountedmicrophonesoranin-tubetraversingmicrophone,andsubsequentcalculationofthecomplexacoustictransferfunction,thenormalincidenceabsorptionandtheimpedanceratiosoftheacousticmaterial.Thetestmethodisintendedtoprovideanalternative,andgenerallymuchfaster,measurementtechniquethanthatofISO10534-1.ComparedwiththemeasurementofthesoundabsorptioninareverberationroomaccordingtothemethodspecifiedinISO354,therearesomecharacteristicdifferences.Thereverberationroommethodwill(underidealconditions)determinethesoundabsorptioncoefficientfordiffusesoundincidence,andthemethodcanbeusedfortestingofmaterialswithpronouncedstructuresinthelateralandnormaldirections.However,thereverberationroommethodrequirestestspecimenswhichareratherlarge,soitisnotconvenientforresearchanddevelopmentwork,whereonlysmallsamplesoftheabsorberareavailable.Theimpedancetubemethodislimitedtoparametricstudiesatnormalincidencebutrequiressamplesofthetestobjectwhichareofthesamesizeasthecross-sectionoftheimpedancetube.Formaterialsthatarelocallyreacting,diffuseincidencesoundabsorptioncoefficientscanbeestimatedfrommeasurementresultsobtainedbytheimpedancetubemethod.Fortransformationofthetestresultsfromtheimpedancetubemethod(normalincidence)todiffusesoundincidence,seeannexF.
【中国标准分类号】:A42
【国际标准分类号】:17_140_01
【页数】:27P;A4
【正文语种】:英语
【原文标准名称】:船舶上电气和电子设备安装的实施规则
【标准号】:BS8450-2006
【标准状态】:现行
【国别】:英国
【发布日期】:2006-07-26
【实施或试行日期】:2006-07-26
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:设计;发电机;配电;电击;电气设备;电气装置;电气安全;电气测试;电子设备及元件;防火安全;检验;装配;维修;安全措施;船舶;水路运输工程
【英文主题词】:
【摘要】:ThisBritishStandardgivesrecommendationsforthedesign,installationandmaintenanceofelectricalequipmentforthegeneration,storage,conversion,distributionandutilizationofelectricalenergyforallpurposesinshipsofalldescriptions,including,whererelevant,inlandandharbourcraft,butexcludingshipsofwar.NOTEForvesselssmallerthan500grtorwithalengthlessthan50m,IEC60092-507providesabasicstandardforsmallvesselelectricalinstallations,includingdirectcurrentsystemsnotexceeding50Vandalternatingcurrentsystemsnotexceeding250Vsinglephaseor500Vthreephase.Theserecommendationsareintendedtoprovidesatisfactoryoperationandsafety,especiallyfromfireandelectricalshock,ofinstalledequipmentandportableandtransportableequipmentwhichisintendedtobeconnectedtotheship’selectricaldistributionsystem.Theyrelateprincipallytorequirementsfortheinstallation,utilization,inspectionandtesting,butcertainrecommendationsfortheconstructionofelectricalandelectronicequipmentareincluded.ThisBritishStandardisnotapplicabletotheinternalwiringofmanufacturedapparatusthatisnotwiredonboard.Itisnotintendedtoprovideforeverycircumstance–thoseofaspecialcharactermayrequireappropriateadvice.
【中国标准分类号】:U60
【国际标准分类号】:47_020_60
【页数】:68P;A4
【正文语种】:英语
【英文标准名称】:Acoustics-Determinationofsoundabsorptioncoefficientandimpedanceinimpedancetubes-Part2:Transfer-functionmethod
【原文标准名称】:声学阻抗管中吸声系数和比阻抗率的测量第2部分:传递函数法
【标准号】:ISO10534-2-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-11
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC43
【标准类型】:()
【标准水平】:()
【中文主题词】:测定;声学;声音吸收;传输;声学测量;声学试验;吸声系数;建筑声学;吸声;声试验
【英文主题词】:Acousticabsorption;Acousticmeasurement;Acoustictesting;Acoustics;Buildingacoustics;Determination;Soundabsorption;Soundabsorptioncoefficient;Transmission
【摘要】:Thistestmethodcoverstheuseofanimpedancetube,twomicrophonelocationsandadigitalfrequencyanalysissystemforthedeterminationofthesoundabsorptioncoefficientofsoundabsorbersfornormalsoundincidence.Itcanalsobeappliedforthedeterminationoftheacousticalsurfaceimpedanceorsurfaceadmittanceofsoundabsorbingmaterials.Sincetheimpedanceratiosofasoundabsorptivematerialarerelatedtoitsphysicalproperties,suchasairflowresistance,porosity,elasticityanddensity,measurementsdescribedinthistestmethodareusefulinbasicresearchandproductdevelopment.ThetestmethodissimilartothetestmethodspecifiedinISO10534-1inthatitusesanimpedancetubewithasoundsourceconnectedtooneendandthetestsamplemountedinthetubeattheotherend.However,themeasurementtechniqueisdifferent.Inthistestmethod,planewavesaregeneratedinatubebyanoisesource,andthedecompositionoftheinterferencefieldisachievedbythemeasurementofacousticpressuresattwofixedlocationsusingwall-mountedmicrophonesoranin-tubetraversingmicrophone,andsubsequentcalculationofthecomplexacoustictransferfunction,thenormalincidenceabsorptionandtheimpedanceratiosoftheacousticmaterial.Thetestmethodisintendedtoprovideanalternative,andgenerallymuchfaster,measurementtechniquethanthatofISO10534-1.ComparedwiththemeasurementofthesoundabsorptioninareverberationroomaccordingtothemethodspecifiedinISO354,therearesomecharacteristicdifferences.Thereverberationroommethodwill(underidealconditions)determinethesoundabsorptioncoefficientfordiffusesoundincidence,andthemethodcanbeusedfortestingofmaterialswithpronouncedstructuresinthelateralandnormaldirections.However,thereverberationroommethodrequirestestspecimenswhichareratherlarge,soitisnotconvenientforresearchanddevelopmentwork,whereonlysmallsamplesoftheabsorberareavailable.Theimpedancetubemethodislimitedtoparametricstudiesatnormalincidencebutrequiressamplesofthetestobjectwhichareofthesamesizeasthecross-sectionoftheimpedancetube.Formaterialsthatarelocallyreacting,diffuseincidencesoundabsorptioncoefficientscanbeestimatedfrommeasurementresultsobtainedbytheimpedancetubemethod.Fortransformationofthetestresultsfromtheimpedancetubemethod(normalincidence)todiffusesoundincidence,seeannexF.
【中国标准分类号】:A42
【国际标准分类号】:17_140_01
【页数】:27P;A4
【正文语种】:英语
