【英文标准名称】:Spacesystems-Structuraldesign-Stressanalysisrequirements
【原文标准名称】:航天系统.结构设计.应力分析要求
【标准号】:ISO16454-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-11
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC20
【标准类型】:()
【标准水平】:()
【中文主题词】:航空航天运输;定义;负荷;数学计算;安全;软件;航天安全;航天运输;航天飞行器;航天器;规范(验收);应变;应力;应力分析;结构成分
【英文主题词】:Aerospacetransport;Definition;Definitions;Loading;Mathematicalcalculations;Safety;Software;Spacesafety;Spacetransport;Spacevehicles;Spacecraft;Specification(approval);Strain;Stress;Stressanalysis;Structuralcomponent
【摘要】:ThisInternationalStandardisintendedtobeusedforthedeterminationofthestress/straindistributionandmarginsofsafetyinlaunchvehiclesandspacecraftprimarystructuredesign.Liquidpropellantenginestructures,solidpropellantenginenozzlesandthesolidpropellantitselfarenotcovered,butliquidpropellanttanks,pressurevesselsandsolidpropellantcasesarewithinthescopeofthisInternationalStandard.ThisInternationalStandardprovidesrequirementsforthedeterminationofmaximumstressandcorrespondingmarginofsafetyunderloading,anddefinescriteriaforstaticstrengthfailuremodes,suchasrupture,collapseanddetrimentalyielding.Criticalconditionsassociatedwithfatigue,creepandcrackgrowthsarenotcovered.Notwithstandingtheselimitationsinscope,theresultsofstresscalculationsbasedontherequirementsofthisInternationalStandardareapplicabletoothercriticalconditionanalyses.InaccordancewiththerequirementsofthisInternationalStandard,models,methodsandproceduresforstressdeterminationcanalsobeappliedtothedisplacementsanddeformationcalculations,aswellastotheloadsdefinition,appliedtosubstructuresandstructuralmembersofstructuresunderconsideration.WhenthisInternationalStandardisapplied,itisassumedthattemperaturedistributionhasbeendeterminedandisusedasinputdata.
【中国标准分类号】:V04
【国际标准分类号】:49_140
【页数】:13P;A4
【正文语种】:英语


【英文标准名称】:Industrialcommunicationnetworks-Fieldbusspecifications-Part3-3:Data-linklayerservicedefinition-Type3elements(IEC61158-3-3:2007);EnglishversionEN61158-3-3:2008,onlyonCD-ROM
【原文标准名称】:工业通讯网络.现场总线规范.第3-3部分:数据联络层设备定义.3型元件.仅为CD-ROM
【标准号】:DINEN61158-3-3-2008
【标准状态】:现行
【国别】:德国
【发布日期】:2008-09
【实施或试行日期】:2008-09-01
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:总线系统;总线;电路网络;通信;控制设备;控制系统;控制工艺学;数据通信;数据链层;数据连接系统;数据处理;数据设备;数据传送;定义;数字的;数字数据;数字工程;电子数据处理;电气工程;电子仪器;电子系统;英语;现场总线;制导系统;工业的;工业设施;信息交换;信息处理;信息技术;接口(数据处理);链路层;开放系统互连;OSI;过程控制;过程控制工程;过程控制系统;处理字段总线;信号;规范;规范(验收);传输媒质
【英文主题词】:Bussystems;Buses(dataprocessing);Circuitnetworks;Communication;Controlequipment;Controlsystems;Controltechnology;Datacommunication;Datalinklayers;Datalinksystem;Dataprocessing;Dataservices;Datatransfer;Definition;Definitions;Digital;Digitaldata;Digitalengineering;EDP;Electricalengineering;Electronicinstruments;Electronicsystems;Englishlanguage;Fieldbus;Guidancesystems;Industrial;Industrialfacilities;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces(dataprocessing);Linklayers;Opensystemsinterconnection;OSI;Processcontrol;Processcontrolengineering;Processcontrolsystems;PROFIBUS;Signals;Specification;Specification(approval);Transmissionmedia
【摘要】:1.1OverviewThispartofIEC61158providescommonelementsforbasictime-criticalmessagingcommunicationsbetweendevicesinanautomationenvironment.Theterm“time-critical”isusedtorepresentthepresenceofatime-window,withinwhichoneormorespecifiedactionsarerequiredtobecompletedwithsomedefinedlevelofcertainty.Failuretocompletespecifiedactionswithinthetimewindowrisksfailureoftheapplicationsrequestingtheactions,withattendantrisktoequipment,plantandpossiblyhumanlife.ThisstandarddefinesinanabstractwaytheexternallyvisibleserviceprovidedbytheType3fieldbusdata-linklayerintermsofa)theprimitiveactionsandeventsoftheservice;b)theparametersassociatedwitheachprimitiveactionandevent,andtheformwhichtheytake;andc)theinterrelationshipbetweentheseactionsandevents,andtheirvalidsequences.Thepurposeofthisstandardistodefinetheservicesprovidedto?theType3fieldbusapplicationlayerattheboundarybetweentheapplicationanddata-linklayersofthefieldbusreferencemodel,and?systemsmanagementattheboundarybetweenthedata-linklayerandsystemsmanagementofthefieldbusreferencemodel.1.2SpecificationsTheprincipalobjectiveofthisstandardistospecifythecharacteristicsofconceptualdata-linklayerservicessuitablefortime-criticalcommunications,andthussupplementtheOSIBasicReferenceModelinguidingthedevelopmentofdata-linkprotocolsfortime-criticalcommunications.Asecondaryobjectiveistoprovidemigrationpathsfrompreviouslyexistingindustrialcommunicationsprotocols.ThisspecificationmaybeusedasthebasisforformalDL-Programming-Interfaces.Nevertheless,itisnotaformalprogramminginterface,andanysuchinterfacewillneedtoaddressimplementationissuesnotcoveredbythisspecification,includinga)thesizesandoctetorderingofvariousmulti-octetserviceparameters,andb)thecorrelationofpairedrequestandconfirm,orindicationandresponse,primitives.1.3ConformanceThisstandarddoesnotspecifyindividualimplementationsorproducts,nordotheyconstraintheimplementationsofdata-linkentitieswithinindustrialautomationsystems.Thereisnoconformanceofequipmenttothisdata-linklayerservicedefinitionstandard.Instead,conformanceisachievedthroughimplementationofthecorrespondingdata-linkprotocolthatfulfillstheType1data-linklayerservicesdefinedinthisstandard.
【中国标准分类号】:N18;P76
【国际标准分类号】:35_100_20;35_160;35_240_50
【页数】:71P.;A4
【正文语种】:英语