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64200812JournalofWaterResourcesandArchitecturalEngineeringVol.6No.4Dec.,2008:20080908:20080918:(1981),(),,,FDS于群,刘畅,张亮(,110168):FDS(FireDynamicsSimulator)是火灾模拟中的一个重要软件它根据建筑和火灾的特性,通过对火灾场景的模拟,以简单直观的形式动态显示出火灾发生的全过程,并在计算过程中获得较准确的火灾相关参数,如温度场分布,烟气流动及热辐射等基于FDS软件的使用,在设定火灾发生场景时,主要包括空间尺寸的定义网格划分模拟时间的设定火源设置障碍物的设定及其边界条件等该软件采用先进的大涡流模拟技术,在时间和空间的预测上具有二阶精度,得到众多实例的验证,在建筑结构和火灾安全工程领域应用十分广泛:火灾;场模拟程序;温度场;计算机模拟:X4;TU998.12:A:16721144(2008)04012403AnalysisonFireSimulationandApplicationBasedonFDSYUQun,LIUChang,ZHANGLiang(CivilEngineeringCollegeofShenyangArchitecturalUniversity,Shenyang,Liaoning110168,China)Abstract:BasedonthefieldsimulationprogramFDS(FireDynamicsSimulator)isamajorfiresimulationsoftware.Accordingtothecharacteristicsofabuildingandfireandthroughsimulatingthefirescene,thewholefireprocessisdisplayeddynamicallyinasimpleandintuitiveform,andsomefirerelatedparametersareobtained,suchasthetemperaturedistribution,thesmokegasflow,thethermalradiationandsoon.BasedontheFDSsoftware,thesettingofthefirescenemainlyincludes:thespacesize,meshinggrids,simulationtime,fireresource,obstacles,boundaryconditionsandsoon.Byusingtheadvancedsimulationtechnologyofbigswirl,thesoftwarehasthesecondorderaccuracyintimeandspace,itisverifiedbyagreatnumberofsamples,andappliedinthebuildingstructureandfiresafetyengineeringfields.Keywords:fire;fieldsimulationprogram;temperaturefielddistribution;computersimulation1概述,,,,,FDS,CFASTFA3[1]FDS(),[2]FDSCFD(),[1]2FDS的使用FDS,FDSSmokeview,FDSSmokeviewFDS,FDS2.1PDIM,,(X0,Y0,Z0),(X,Y,Z),X0,Y0,Z00,X,Y,Z:&PDIMXBAR=6,YBAR=4,ZBAR=3/,6m4m3m,(0,0,0),(6,4,3)2.2TimeTWFIN(TimeWhenFinish),:&TIMETWFIN=600/,600s2.3FDS,,,[3],GRIDIBAR(X),JBAR(Y),KBAR(Z),X,Z,,,,,[4],,,(FFTs)[5],2l3m5n(l,m,n):32=25,72=233239,1212.4,,OBST,HRRPUA2.4.1FDS,OBST,:&OBSTXB=2.5,3.0,2.5,3.0,0,0.5,SURFIDS=!FIRE∀,!FIRE∀,!INERT∀/,(2.5,2.5,0),(3.0,3.0,0.5),,,&OBSTXB=2.5,3.0,2.5,3.0,0,0.5,SURFID6=!FIRE∀,!FIRE∀,!FIRE∀,!FIRE∀,!FIRE∀,!INERT∀/,(2.5,2.5,0),(3.0,3.0,0.5),,,,OBST,SURFIDSSURFID6:SURFIDS,SURFID62.4.2HRRPUA,,kW/m2():&SURFID=!BURNER∀,HRRPUA=1000/,BURNER,1000kW/m22.5,OBST,OBST(X1,Y1,Z1)(X2,Y2,Z2),,:&OBSTXB=0.24,1.44,3.76,5.76,0.00,0.50,SURFID=!SPRUCE∀/(0.24,3.76,0.0),(1.44,5.76,0.5),SPRUCE()SPRUCEdatabase4.data,FDS,database42.6FDS,SLCP,:&SLCFPBZ=2.0,QUANTITY=!TEMPERATURE∀/&SLCFPBZ=2.0,QUANTITY=!HRRPUV∀/&SLCFPBZ=2.0,QUANTITY=!MIXTUREFRACTION∀/&SLCFPBZ=2.0,QUANTITY=!RADIANTINTENSITY∀/,Z=2m,Smokeview3应用实例,FDS,,,,4.5m6m3.2m,,1:,,:,,,FDS,,1000kW/m2,20#1254,:FDS,FDS2T=600s,34T=600s,Z=2.4mZ=3m,1100#,5T=600s,X=2m,280#,1000#,6T=240s,Z=2.8m,,7(1.2,5.5,2.2)-,345s,1032#,4结语FDS,,FDS,,FDS,,,FDS,:[1],,.[J].,2003,23(2):6369.[2]KevinMcGrattan,GlennForney.FireDynamicsSimulator(Version4)User∀sGuide[R].U.S.GovernmentPrintingOffice,2006:131.[3]J.Y.RichardLiew,M.ASCE,L.K.Tang,andY.S.Choo,M.ASCE.Advancedanalysisforperformancebaseddesignofsteelstructuresexposedtofires[J].JouralofStructuralEngineering,2002,9:15841592.[4]AlexandreLandesmann,EduardodeM.Batistab,JosL.DrummondAlves.Implementationofadvancedanalysismethodforsteelframedstructuresunderfireconditions[J].FireSafetyJournal,2005,(40):339366.[5]KevinMcGrattan,GlennForney.FireDynamicsSimulator(Version4)TechnicalReferenceGuide[R].U.S.GovernmentPrintingOffice,2006:2529.1266
本文标题:浅析FDS火灾模拟与应用
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