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【英文标准名称】:Reciprocatinginternalcombustionenginedrivenalternatingcurrentgeneratingsets-Measurementofairbornenoisebytheenvelopingsurfacemethod
【原文标准名称】:往复式内燃机驱动交流发电机组.用包络表面法对空气中噪音进行测定
【标准号】:BS7698-10-1999
【标准状态】:现行
【国别】:英国
【发布日期】:1999-01-15
【实施或试行日期】:1999-01-15
【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】:往复式发动机;法规;声强;位置;原动机;水路运输工程部件;内燃机;报告;静止的;声学测量;名称与符号;误差修正;易动的;交流发电机;噪声(环境的);准确度;电气设备;发电机;固定的;电机;试验条件
【英文主题词】:Acoustictesting;Acoustics;Definition;Definitions;Internalcombustionengines;Measurementofairbornenoise;Motorgenerator;Noise
【摘要】:ThispartofISO8528definesmeasurementmethodsforthedeterminationofairbornenoiseemittedbyreciprocatinginternalcombustionenginedrivengeneratingsetsinsuchawaythatthetotalofrelevantnoiseemissions,e.g.exhaustandcoolingsystemnoise,togetherwithallothersourcesofenginenoise,areevaluatedonasimilarbasistoyieldcomparableresults.However,whentheexhaustandcoolingsystemsareductedtoaremotesitetheirnoisecontributionisnottobeincludedinthispartofISO8528.Theessentialnoiseemissioncharacteristicvalueisthesoundpowerlevel.TheresultsofmeasurementtakeninaccordancewiththispartofISO8528areclassifiedaseitheraccuracygrade2orgrade3dependingonwhichacousticmeasurementconditionsarecompliedwith.Accuracygrade2(i.e.,engineeringmethodinaccordancewithISO3744)requiresthemeasuringareatobeasubstantiallyacoustic-freefieldoverareflectingplane(withanenvironmentalcorrectionK2A≤2dB)andwithnegligiblebackgroundnoiselevel(backgroundnoisecorrectionK1A≤1,3dB).Accuracygrade3(i.e.surveymethodinaccordancewithISO3746)requirestheenvironmentalcorrectionK2Atobelessorequalthan7dB,andthebackgroundnoisecorrectionK1Atobelessorequalthan3dB.FortheoperationofageneratingsetundersteadyconditionsthispartofISO8528allowsforthecalculationoftheA-weightedsoundpowerlevelaswellasappropriateoctaveoronethirdoctavesoundpowerlevelfortheappropriateaccuracygrade.ThispartofISO8528appliestoRICenginedrivenACgeneratingsetsforfixedandmobileapplicationswithrigidorflexiblemountings.Itisapplicableforlandandmarineuse,excludinggeneratingsetsusedonaircraftortopropellandvehiclesandlocomotives.NOTE1ThispartofISO8528hasbeendevelopedforRICenginedrivenACgeneratingsets,butitcanalsobeappliedtoRICenginedrivenDCgeneratingsets.NOTE2Forsomespecificapplications(e.g.essentialhospitalsupplies,highrisebuildings,etc.)supplementaryrequirementsmaybenecessary.TheprovisionsofthispartofISO8528shouldberegardedasabasis.NOTE3Truecomparisonscanonlybemadebetweengeneratingsetswhenthemeasurementareclassifiedinthesameaccuracygrade.
【中国标准分类号】:K52
【国际标准分类号】:17_140_20;29_160_40
【页数】:22P.;A4
【正文语种】:英语


【英文标准名称】:Aerospaceseries-Bolts,panhead,sixloberecess,relievedshank,longthread,inheatresistingsteelFE-PA2601(FE-PA92HT,A286),silverplated-Classification:1100MPa(atambienttemperature)/650°C;GermanandEnglishversionEN3912:2007
【原文标准名称】:航空航天系列.镀银、FE-PA2601(FE-PA92HT,A286)型、长螺纹、细杆、六瓣凹槽、平头螺栓耐热钢.分类:1100MPa(环境温度)/650℃
【标准号】:EN3912-2007
【标准状态】:现行
【国别】:
【发布日期】:2007-11
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:航空航天运输;航空运输;合金钢;带帽螺钉;高温;内驱动;作标记;材料;多语种的;平头螺钉;特性;螺钉(螺栓);镀银;航天运输;规范(验收);钢;表面处理;表面;螺纹
【英文主题词】:Aerospacetransport;Airtransport;Alloysteels;Headscrews;Hightemperature;Internaldrive;Marking;Materials;Multilingual;Panheadscrews;Properties;Screws(bolts);Silver-coated;Spacetransport;Specification(approval);Steels;Surfacetreatment;Surfaces;Threads
【摘要】:
【中国标准分类号】:V20
【国际标准分类号】:49_030_20
【页数】:18P.;A4
【正文语种】:英语