ANSI/CEA 2010-A-2012 电动超低音音箱测量的标准方法
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【英文标准名称】:StandardMethodofMeasurementforPoweredSubwoofers
【原文标准名称】:电动超低音音箱测量的标准方法
【标准号】:ANSI/CEA2010-A-2012
【标准状态】:现行
【国别】:美国
【发布日期】:2012
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:声学;音频的;音频系统;电子产品;频率范围;测量;功率测量;机动
【英文主题词】:Acoustics;Audio;Audiosystems;Electronicproducts;Frequencyranges;Measurement;Powermeasurement;Powered
【摘要】:Definesamethodformeasuringtheperformanceofpoweredsubwoofers.
【中国标准分类号】:L31
【国际标准分类号】:33_160_50
【页数】:
【正文语种】:英语
Product Code:SAE AS117
Title:Hose Assembly, Nonmetallic - 3000 psi, TFE, Flareless, Straight to 90掳, Lightweight
Issuing Committee:G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Scope:No scope available.【英文标准名称】:StandardTestMethodforRadialCrushingStrength,K,ofPowderMetallurgy(P/M)BearingsandStructuralMaterials
【原文标准名称】:粉末冶金(P/M)承重和结构材料的径向压溃强度K的标准试验方法
【标准号】:ASTMB939-2009
【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】:B09.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:K;materialstrength;PMbearings;radialcrushingstrength;Structuralmaterials;Powdermetallurgy(P/M)materials;Radialcrushing;Radialcrushingforce
【摘要】:TheradialcrushingstrengthtestisadestructiveprocedureusedtodetermineamaterialstrengthcharacteristicofPMbearingsandhollowcylindricaltestspecimens.Thesedatacanbeusedtograde,classify,andevaluatethematerials.ThePMbearingSpecificationsB438andB439requiretheuseofthistestmethodasanacceptancetestforthestrengthofoil-impregnatedsinteredbearings.Thistestmethodmaybeusedbypowderproducersandpartsmanufacturersasalotacceptancetestformetalpowdersandlubricatedpowdermixturesintendedfortheproductionofporousparts.CompaniesinthePMindustryusethistestasamanufacturingcontroltestbecauseitisappropriateforproductionpractices.RadialcrushingstrengthisapropertyofthePMmaterialbutisnotadesignvalue.However,experiencehasshownthattheradialcrushingstrengthofamaterialisapproximatelytwicetheultimatetensilestrength.1.1Thistestmethodcoverstheequipmentandlaboratoryprocedureforthedeterminationoftheradialcrushingstrengthofmaterialsusingeitheraplainpowdermetallurgy(PM)bearingorathin-walledhollowcylindricaltestspecimen.Thisisadestructivetestthatproducesquantitativeresults.1.2Limitations:1.2.1Theprincipleofthisprocedureisbasedonthematerialbeingtestedhavingminimalductility.Thepermanentdeflectionofthecylinderduringthetestshouldnotexceed10%oftheoutsidediameter.1.2.2Theradialcrushingstrengthtestresultsshouldbeusedonlyasaguideifthetestspecimenhasawallthicknessthatisgreaterthanone-thirdoftheoutsidediameter.Thesetestresultsshouldthenonlybeusedforcomparisonwithdatafromthetestspecimensoflikematerialsandsimilardimensions.1.3Withtheexceptionofdensityvalues,forwhichtheg/cm3unitistheindustrystandard,thevaluesstatedininch-poundunitsaretobeconsideredthestandard.ThevaluesinSIunits,showninparenthesishavebeenconvertedinaccordancewithIEEE/ASTMStandardSI10,maybeapproximateandareonlyincludedforinformation.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H72
【国际标准分类号】:77_160
【页数】:3P.;A4
【正文语种】:英语
