Product Code:SAE J1444
Title:Procedure for Evaluating Transient Response of Small Engine Driven Generator Sets
Issuing Committee:Small Engine And Powered Equipment Committee
Scope:The scope of this SAE Recommended Practice is to provide a uniform practice for the testing of small engine-powered alternating current generator sets. The small engines addressed are the reciprocating piston type of 14.9 kw (20 BHP) or less.【英文标准名称】:StandardGuideforUsingtheSeismic-ReflectionMethodforShallowSubsurfaceInvestigation
【原文标准名称】:用地震反射法的浅地下勘测的标准指南
【标准号】:ASTMD7128-2005(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:2005
【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】:D18.01
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:geophysics;near-surface;seismicreflection;surfacegeophysics;Subsurfaceinvestigations;Seismic-reflectionmethod
【摘要】:Concepts:Thisguidesummarizesthebasicequipment,fieldprocedures,andinterpretationmethodsusedfordetecting,delineating,ormappingshallowsubsurfacefeaturesandrelativechangesinlayergeometryorstratigraphyusingtheseismic-reflectionmethod.Commonapplicationsofthemethodincludemappingthetopofbedrock,delineatingbedorlayergeometries,identifyingchangesinsubsurfacematerialproperties,detectingvoidsorfracturezones,mappingfaults,definingthetopofthewatertable,mappingconfininglayers,andestimatingofelastic-wavevelocityinsubsurfacematerials.PersonnelrequirementsareasdiscussedinPracticeD3740.Subsurfacemeasurementsusingtheseismic-reflectionmethodrequireaseismicsource,multipleseismicsensors,multi-channelseismograph,andappropriateconnections(radioorhardwire)betweeneach(Fig.1,alsoshowingoptionalroll-alongswitch).Seismicwavesgeneratedbyacontrolledseismicenergysourcepropagateintheformofmechanicalenergy(particlemotion)fromthesourcethroughthegroundorairtoseismicsensorswheretheparticle(ground)motionisconvertedtoelectricalvoltageandtransmittedtotheseismograph.Seismicenergytravelsawayfromthesourceboththroughthegroundandair.Intheground,theenergytravelsasanelasticwave,withcompressionalwaves(Eq1)andshearwaves(Eq2)movingawayfromthesourceinahemisphericalpattern,andsurfacewavespropagatingawayinacircularpatternonthegroundsurface.1.1PurposeandApplication:1.1.1Thisguidesummarizesthetechnique,equipment,fieldprocedures,dataprocessing,andinterpretationmethodsfortheassessmentofshallowsubsurfaceconditionsusingtheseismic-reflectionmethod.1.1.2Seismicreflectionmeasurementsasdescribedinthisguideareapplicableinmappingshallowsubsurfaceconditionsforvarioususesincludinggeologic(1),geotechnical,hydrogeologic(2),andenvironmental(3).Theseismic-reflectionmethodisusedtomap,detect,anddelineategeologicconditionsincludingthebedrocksurface,confininglayers(aquitards),faults,lithologicstratigraphy,voids,watertable,fracturesystems,andlayergeometry(folds).Theprimaryapplicationoftheseismic-reflectionmethodisthemappingoflateralcontinuityoflithologicunitsand,ingeneral,detectionofchangeinacousticpropertiesinthesubsurface.
【中国标准分类号】:P13
【国际标准分类号】:07_060
【页数】:25P.;A4
【正文语种】:英语