横风中桥上高速列车的气动性能和动力学性能分析

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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