小半径无缝线路及无缝道岔稳定性研究

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1、Y+976572分类号UDC密级编号车束交通大学硕士学位论文小半径无缝线路及无缝道岔稳定性研究学位申请人：学科专业：指导教师：罗信伟道路与铁道工程雷晓燕教授答辩委员会主席：名位晚答辩日期：加耐·易·bAbstractRESEARCHONTHESTABILITYOFMINORRADIUSCONTINUOUSLYWELDEDRAlLANDWELDEDTURNOUTABSTRACTAlongwiththerequirementfromthedevelopmentofsocialeconomy，thespeedoftrainisincreasingNowaday

2、s，wearefacingwiththesixthincreasingoftrainspeedThecontinuouslyweldedrailway(CWR)iswidelyusedbecauseofitssmoothandcomfortableespeciallythelowcostsonmaintenanceHoweverthereistremendoustemperaturestressinCWRtrack．sothatitmaybringonbulkingoftrack，evenresultintrainoverturningandgigant

3、iceconomicloss．7[hereiSforbiddenzoneinonrcountrywhenlayingtheCWRonminorradiuscurxreButirlanyofrailwaystationsoperatedandbrokentheforbiddenandtherailwayrunwell．whichshowthattherewaspotentialinlayingtheCWRonminorradiuscurvelnthispaperthestabilityofminorradiusCWRwereanalyzedbyfinite

4、elementmethodAndtheadvantagefactorsanddisadvantagefactorswereproved．AndtheresultswerecomparedwithtiletraditionalmethodBysuchmethod，wegotthelateraldisplacementcurves'andthedistortioncurvesoftrackfromfastening—downtemperatureofrailuntildestroyedComparedtothetraditionalmethod．tilefi

5、niteelementmethodmightlessenthehypothesisandapproachtotherealityBythemethod，severalcomplexconditionswereconsideredandthetrendoflateraldisplacementoftrackwasfoundThen，theoreticdirectionmaybeorieledtoraildepartnrentwhentherailwaysneedmaintainingAndtheret’erencemaybeofferedtotraditi

6、onalmethodwhensupposingthedistortioncurve．Comparedtocommontrack，thecontinuouslyweldedturnoutismorecomplexonstructureandtheforcesufferedBythefiniteelementmethod，ageneralandprecisemodelofNo12continuouslyweldedturnoutwithrigidflogswasbuilt，andthelongitudinalstabilityisanalyzedSubseq

7、uently,thecurvesofthelongitudinaldisplacementandthelongitudinalforceindifferenttemperatureforeachtrackweregain，andtheinfluenceoftheturnoutstabilitywasanalyzedfromseveralfactors．KeyWords：continuouslyweldedrail，stability，finiteelementmethod，traditionalmethodminorradiuschive，continu

8、ouslyweldedturnout独创性声明本人郑重声明：所呈交的学位论文是我