欢迎来到天天文库
浏览记录
ID:36399524
大小:10.07 MB
页数:83页
时间:2019-05-10
《大型地铁换乘站火灾烟气扩散特性及疏散的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、北京工业大学硕士学位论文大型地铁换乘站火灾烟气扩散特性及疏散的研究姓名:侯丛兰申请学位级别:硕士专业:供热、供燃气、通风及空调工程指导教师:李炎锋20090501AbstractAlong、析t11thebuildingofsubwaylines.moreandmorecomplicatedtransferstationscomeup.Asallindispensabletraffictool,subwayplaysamoreandmoreimportantroleinourmodemlife.Itprovidespeopleconvenienceth
2、atCan’tbereplacedbyothertraffictools.Moreover,transferstationisajunctionofthesubwayline’Snet,andthepassagesaretheonlywaytooutside,andthepassagesaremorecomplicated,passengersaremorecrowdedandconcentrated,onceonfire,thedirectionofpeopleevacuationisthesameasthedirectionofsmokediffu
3、sion,bothofwhicharefromundergroundtooutdoortheegressesforpeopletoevacuatearealsoonestospraysmoke.thediffusionof11ightemperaturesmokenotonlydevotetoallthethingsfire,butalsodecreasethevisibilityofthealleyway,anditwillaffecttheevacuationandfireman’Sfirefighting,anditwillcauseveryse
4、riouspeoplecasualty.Compared、^,i也onlyonestation,itismoredangerous.Itisverysignificanttostudysmokediffusioninsubway·transferstation.Inthispaper,thestudysubjectisDongZhimentransferstation.UsingsoftwareCFXoffieldmodelsimulatessituationofsmokediffusiononlyusingstationOWllexhaustsmok
5、esystemwhenthemiddleofstationplatformorthemiddleofthehallisonfire.CFXcandescribethesmokespreadprocessvividly.Moreover,CFXtakesfilelcombustionprocessandradiationeffectintoaccountanditCansimulateallkindsofhannfiflsmokecomponentsandconcentrationofsmoke.Thenwecanknowallthefatalnesso
6、fthefire.Analyzingthesimulationofthefireinheatreleaserate5MWandonlyusingstationownexhaustsmokesystem.Wecanestimatethepathtoevacuate,andanalyzethetimeofthefourdangers’coming,includingthetemperaturedangers’comingtimeintwosafetyheightsthevisibilitydangers’comingtimeandtheconcentrat
7、ionofCOdangers’comingtimethenfindtheshortesttimeandgaintheAvailableSafeEgress"time(ASET),andanalyzetheaffectionoftheevacuationbythesmoke.TheevacuationsoftwareSTEPSiSahighlyeffectivethreedimensionalsoftware.DesignedbyMottMacDonald.TllispaperusingSTEPSsimulatetheevacuatetime.Eachh
8、allofstationhas100people.Eachinsularstationhas5
此文档下载收益归作者所有