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ID:33013237
大小:3.36 MB
页数:79页
时间:2019-02-19
《横风中桥上高速列车的气动性能和动力学性能分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、西南交通大学硕士研究生学位论文第1I页风对磁浮列车车体、悬浮架横向和垂向振动加速度以及桥梁跨中挠度与垂向振动加速度影响甚微。关键词:轮轨列车;磁浮列车;高架桥;空气动力学;运行安全性;横风西南交通大学硕士研究生学位论文第1II页AbstractAtpresent,theoperationlengthofnewhigh—speedrailwayismorethan6000kminChina,and6000km—lengthhigh—speedrailwaywillcomeintoservicein2012.Then,Chines
2、ehigh—speedrailwaybackbonenetworkwillbecompletedbasicallyandpassthroughvastregion.Thelengthofrailwaylineonbridgescoversmorethan80%ofnewhigh-speedrailwayinChina.Affectedbydifferentgeologicalandclimaticcondition,therunningsafetyofhigh—speedtrainpassingthroughthebridge
3、israthercomplex,whichisacrucialissueduringtherunningoperationofChinesehigh—speedrailway.Inparticular,therunningsafetyofhigh—speedtrainonthebridges,undercrosswind,isquiteimportant.However,thecorrespondinginvestigationisstillnotcomprehensiveinChina,moredetailedresearc
4、hworkisrequired.Ontheotherhand,theresearchworkonaerodynamicperformanceandrunningsafetyofthehigh—speedmaglevtrainonbridges,undercrosswind,israreintheworld.AlthoughtheShanghaimaglevtrainhasrunningforalmost9years,SOtheresearchonrunningsafetyofmaglevtrainundercrosswindi
5、salsodemandedtodevelopmaglevtransporttechnology.Underthisbackground,thethesisstudiedtheaerodynamicperformanceofthewheel—on—railhigh·speedtrainandthehigh—speedmaglevtrainonbridges,undercrosswind,areinvestigated,aswellastherunningsafetyofhigh-speedtrain.Theconclusions
6、drawnfromthenumericalanalysiswillprovidesomereferencetothedesign,constructionandoperationofChinesehigh—speedrailway.Firstly,aerodynamicmodelsofthewheel-on-railtrainandbridgesystem,themaglevtrainandbridgesystemundercrosswindaresetup.Then,thecorrespondingtraindynamicm
7、odelsarebuilt.Theflowstructurearoundthetrainandthepressuredistributiononthesurfaceoftrainarediscussed.Influencesoftrainspeed,crosswindvelocityandheightofviaductonaerodynamicperformanceofthewheel—on—railtrainandmaglevtrainareanalyzed.Aerodynamicperformancesandtherunn
8、ingsafetyofthewheel—on-railtrain,undernaturalwindandevenwind,onthewindwardandleewardsideofadouble—trackviaduct,arecompared.Thecriticalsafe
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