【英文标准名称】:Luminaires-Particularrequirements-SpecificationforluminaireswithtypeofprotectionN
【原文标准名称】:灯具.第102部分:特殊要求.第51节:N型防护灯具规范
【标准号】:BS4533-102.51-1986
【标准状态】:作废
【国别】:英国
【发布日期】:1986-09-30
【实施或试行日期】:1986-09-30
【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】:耐久试验;灯具;温升;接线端;照明设备;余隙距离;试验条件;电气试验;荧光灯;作标记;镇流器;介电强度试验;钨丝灯;漏电路径;热试验;压力试验;试验设备;灯头;白热丝灯;n型防护电气设备;放电灯;冲击试验;脉冲电压试验
【英文主题词】:
【摘要】:
【中国标准分类号】:K72
【国际标准分类号】:29_140_40;29_260_20
【页数】:22P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodsforDownholeSeismicTesting
【原文标准名称】:井下地震测试的标准试验方法
【标准号】:ASTMD7400-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D18.09
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:accelerometers;compressionwave;geophones;machinefoundations;seismicwaves;shearwaves;wavevelocity;Seismictesting
【摘要】:Theseismicdownholemethodprovidesadesignerwithinformationpertinenttotheseismicwavevelocitiesofthematerialsinquestion(1).TheP-waveandS-wavevelocitiesaredirectlyrelatedtotheimportantgeotechnicalelasticconstantsofPoissonx2019;sratio,shearmodulus,bulkmodulus,andYoungx2019;smodulus.Accuratein-situP-waveandS-wavevelocityprofilesareessentialingeotechnicalfoundationdesigns.Theseparametersareusedinbothanalysesofsoilbehaviorunderbothstaticanddynamicloadswheretheelasticconstantsareinputvariablesintothemodelsdefiningthedifferentstatesofdeformationssuchaselastic,elasto-plastic,andfailure.Anotherimportantuseofestimatedshearwavevelocitiesingeotechnicaldesignisintheliquefactionassessmentofsoils.Afundamentalassumptioninherentinthetestmethodsisthatalaterallyhomogeneousmediumisbeingcharacterized.InalaterallyhomogeneousmediumthesourcewavetraintrajectoriesadheretoSnellx2019;slawofrefraction.Anotherassumptioninherentinthetestmethodsisthatthestratigraphicmediumtobecharacterizedcanhavetransverseisotropy.Transverseisotropyisaparticularlysimpleformofanisotropybecausevelocitiesonlyvarywithverticalincidenceangleandnotwithazimuth.Byplacingandactuatingtheseismicsourceatoffsetsrotated90x00B0;inplanview,itmaybepossibletoevaluatethetransverseanisotropyofthemedium.Note18212;Thequalityoftheresultsproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilities.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.1.1Thesetestmethodsarelimitedtothedeterminationoftheintervalvelocitiesfromarrivaltimesandrelativearrivaltimesofcompression(P)andvertically(SV)andhorizontally(SH)polarizedshear(S)seismicwaveswhicharegeneratednearsurfaceandtraveldowntoanarrayofverticallyinstalledseismicsensors.Apreferredmethodintendedtoobtaindataforuseoncriticalprojectswherethehighestqualitydataisrequiredisincluded.Alsoincludedisanoptionalmethodintendedforuseonprojectswhichdonotrequiremeasurementsofahighdegreeofprecision.1.2Variousapplicationsofthedatawillbeaddressedandacceptableproceduresandequipment,suchasseismicsources,receivers,andrecordingsystemswillbediscussed.Otheritemsaddressedincludesource-to-receiverspacing,drilling,casing,grouting,aprocedureforboreholeinstallation,andconductingactualboreholeandseismicconetests.Datareductionandinterpretationislimitedtotheidentificationofvariousseismicwavetypes,apparentvelocityrelationtotruevelocity,examplecomputations,useofSnell''slawofrefraction,andassumptions.1.3Thereareseveralacceptabledevicesthatcanbeusedtogenerateahigh-qualityPorSVsourcewaveorbothandSHsourcewaves.Severaltypesofcommerciallyavailablereceiversandrecordingsystemscanalsobeusedtoconductanacceptabledownholesurvey.Specialconsiderationshouldbegiventothetypesofreceiversusedandtheirconfiguration.Heavily-dampedsensorsshouldnotbeusedsothatspectr......
【中国标准分类号】:E13
【国际标准分类号】:17_160
【页数】:11P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 铣刀 四齿莫氏锥柄靠模立铣刀 d=12~18mm |
| 中标分类： |
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| 替代情况： | HB 714-79 |
| 发布日期： | 1993-02-22 |
| 实施日期： | 1993-05-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 2页 |
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