TB/T 3269-2011 铁道货车弹性旁承
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基本信息
| 标准名称： | 铁道货车弹性旁承 |
| 发布部门： | 中华人民共和国铁道部 |
| 发布日期： | 2011-05-20 |
| 实施日期： | 2011-11-01 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 中国铁道出版社 |
| 出版日期： | 2011-11-01 |
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前言
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引用标准
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Product Code:SAE AS3479
Title:Nut, Self-Locking, Plate, One Lug, Floating, Low Height, UNS S66286, Class: 125 ksi/800 掳F
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:Scope unavailable.【英文标准名称】:StandardTestMethodforElectromagneticShieldingEffectivenessofDurableRigidWallRelocatableStructures
【原文标准名称】:耐久刚性壁浮动结构电磁屏蔽功效的标准试验方法
【标准号】:ASTME1851-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E06.53
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:electromagneticmeasurements;electromagneticshieldedenclosures;magneticfield;planewave;shieldingeffectiveness;Electromagneticshielding;Magneticshields;Planewave;Rigidwallrelocatablestructures(RWRS);Shieldingeffectiveness
【摘要】:Thisstandardprovidesmeasurementproceduresfordeterminingtheelectromagneticshieldingeffectivenessofdurablerigidwallrelocatableshieldedenclosures.Thisstandardspecifiesamethodforcomparingtheshieldedenclosureperformanceofstructuresprovidedbydifferentsuppliers.Inaddition,thisstandardiswrittentominimizevariationsinmeasuredshieldingeffectivenessatagivenfrequencyandtestpointregardlessoftestpersonnel,equipment,andtestsite.Therefore,theshieldingeffectivenessofadurablerigidwallrelocatableshieldedenclosureofanysizefromanysuppliercanbedetermined.Thisstandardspecifiesaminimumsetofmeasurementsatagivenfrequencyandaminimumsetoffrequenciestodetermineshieldingeffectiveness.SourceFields8212;Performanceofashieldedenclosureistobeassessedfortwosourcefields:magneticandplanewave.MagneticFieldMeasurements8212;Theattenuationprovidedbyashieldedenclosureisassessedbyusingalocalsourcetogeneratethenearfield.Themagneticfieldmeasurementsarespecifiedfortwonarrowfrequencybands:140to160kHzand14to16MHz.PlaneWaveMeasurements8212;Theattenuationprovidedbyashieldedenclosureisassessedbyusingalocallygenerateddistantsourceorplanewavefield.Theplanewavemeasurementsarespecifiedforthreenarrowfrequencybands:300to500MHz,900to1000MHz,and8.5to10.5GHz.1.1Thistestmethodcoversthedeterminationoftheelectromagneticshieldingeffectivenessofdurablerelocatableshieldedenclosures.1.1.1Theintendedapplicationofthistestmethodisforvirginshieldedenclosuresthatdonothaveanyequipmentorequipmentracks.Itisrecommendedthattestsbeconductedbeforetheinteriorfinishworkbegins.However,theshieldassemblyincludingallenclosurepenetrationsshallbecompletedandrequiredpenetrationprotectiondevicesshallbeinstalledinaccordancewiththedesignspecification.Thetestmethodcanalsobeusedonexistingshieldedenclosuresafterrepairworkisdonetoverifyworkmanship,butitmaybenecessarytoremoveequipmentorequipmentrackstogainaccesstoatestarea.1.1.2Thetestproceduresdelineatedinthisdocumentarecomprehensiveandmayrequireseveraldaystocompleteforaroom-sizeshieldedenclosure.Ausercanapplythistestmethodforafirstarticletestthatrequiresproofofconceptandvalidationofdesignandfabricationtechnique.AppendixX2providesguidanceonchoosingtestpointssoshieldingeffectivenesstestsonaroom-sizeshieldedenclosuremaybecompletedinaboutone-halfdayforwhichitappliestoshieldedenclosurescomingoffanassemblyline.1.2Thistestmethodisforuseinthefollowingfrequencyranges:140to160kHz,14to16MHz,300to500MHz,900to1000MHz,and8.5to10.5GHz.Specifictestfrequencieswithintheserangesarerequired(see10.1.1and10.2.1).Additionalmeasurementsintherangeof10kHzto10.1.5.1GHzmaybeperformed.Forspecificapplications,thefrequencyrangemaybeextendedfrom50Hzto40GHz.AppendixX1providesguidanceonselectingmeasurementfrequencies.1.3Thistestmethodisnotapplicabletoindividualcomponentssuchasseparatewalls,floors,ceilings,orshieldedracks.1.4Thisstandardmayinvolvehazardousmaterials,operations,equipment,oranycombination.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.I......
【中国标准分类号】:P09
【国际标准分类号】:13_280
【页数】:15P.;A4
【正文语种】:英语
Title:Nut, Self-Locking, Plate, One Lug, Floating, Low Height, UNS S66286, Class: 125 ksi/800 掳F
Issuing Committee:E-25 General Standards For Aerospace And Propulsion Systems
Scope:Scope unavailable.【英文标准名称】:StandardTestMethodforElectromagneticShieldingEffectivenessofDurableRigidWallRelocatableStructures
【原文标准名称】:耐久刚性壁浮动结构电磁屏蔽功效的标准试验方法
【标准号】:ASTME1851-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E06.53
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:electromagneticmeasurements;electromagneticshieldedenclosures;magneticfield;planewave;shieldingeffectiveness;Electromagneticshielding;Magneticshields;Planewave;Rigidwallrelocatablestructures(RWRS);Shieldingeffectiveness
【摘要】:Thisstandardprovidesmeasurementproceduresfordeterminingtheelectromagneticshieldingeffectivenessofdurablerigidwallrelocatableshieldedenclosures.Thisstandardspecifiesamethodforcomparingtheshieldedenclosureperformanceofstructuresprovidedbydifferentsuppliers.Inaddition,thisstandardiswrittentominimizevariationsinmeasuredshieldingeffectivenessatagivenfrequencyandtestpointregardlessoftestpersonnel,equipment,andtestsite.Therefore,theshieldingeffectivenessofadurablerigidwallrelocatableshieldedenclosureofanysizefromanysuppliercanbedetermined.Thisstandardspecifiesaminimumsetofmeasurementsatagivenfrequencyandaminimumsetoffrequenciestodetermineshieldingeffectiveness.SourceFields8212;Performanceofashieldedenclosureistobeassessedfortwosourcefields:magneticandplanewave.MagneticFieldMeasurements8212;Theattenuationprovidedbyashieldedenclosureisassessedbyusingalocalsourcetogeneratethenearfield.Themagneticfieldmeasurementsarespecifiedfortwonarrowfrequencybands:140to160kHzand14to16MHz.PlaneWaveMeasurements8212;Theattenuationprovidedbyashieldedenclosureisassessedbyusingalocallygenerateddistantsourceorplanewavefield.Theplanewavemeasurementsarespecifiedforthreenarrowfrequencybands:300to500MHz,900to1000MHz,and8.5to10.5GHz.1.1Thistestmethodcoversthedeterminationoftheelectromagneticshieldingeffectivenessofdurablerelocatableshieldedenclosures.1.1.1Theintendedapplicationofthistestmethodisforvirginshieldedenclosuresthatdonothaveanyequipmentorequipmentracks.Itisrecommendedthattestsbeconductedbeforetheinteriorfinishworkbegins.However,theshieldassemblyincludingallenclosurepenetrationsshallbecompletedandrequiredpenetrationprotectiondevicesshallbeinstalledinaccordancewiththedesignspecification.Thetestmethodcanalsobeusedonexistingshieldedenclosuresafterrepairworkisdonetoverifyworkmanship,butitmaybenecessarytoremoveequipmentorequipmentrackstogainaccesstoatestarea.1.1.2Thetestproceduresdelineatedinthisdocumentarecomprehensiveandmayrequireseveraldaystocompleteforaroom-sizeshieldedenclosure.Ausercanapplythistestmethodforafirstarticletestthatrequiresproofofconceptandvalidationofdesignandfabricationtechnique.AppendixX2providesguidanceonchoosingtestpointssoshieldingeffectivenesstestsonaroom-sizeshieldedenclosuremaybecompletedinaboutone-halfdayforwhichitappliestoshieldedenclosurescomingoffanassemblyline.1.2Thistestmethodisforuseinthefollowingfrequencyranges:140to160kHz,14to16MHz,300to500MHz,900to1000MHz,and8.5to10.5GHz.Specifictestfrequencieswithintheserangesarerequired(see10.1.1and10.2.1).Additionalmeasurementsintherangeof10kHzto10.1.5.1GHzmaybeperformed.Forspecificapplications,thefrequencyrangemaybeextendedfrom50Hzto40GHz.AppendixX1providesguidanceonselectingmeasurementfrequencies.1.3Thistestmethodisnotapplicabletoindividualcomponentssuchasseparatewalls,floors,ceilings,orshieldedracks.1.4Thisstandardmayinvolvehazardousmaterials,operations,equipment,oranycombination.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesinparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.I......
【中国标准分类号】:P09
【国际标准分类号】:13_280
【页数】:15P.;A4
【正文语种】:英语