资源描述：
《轨道过渡段论文：有砟—无砟轨道过渡段刚度过渡形式的研究》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、轨道过渡段论文：有砟—无砟轨道过渡段刚度过渡形式的研究【中文摘要】轨道过渡段是客运专线以及高速铁路线路中最薄弱的环节之一,由于强度、刚度、基础沉降等差异的存在必然会引起钢轨的垂向不规则变形,导致轮轨间不平顺的产生。为了保证高速铁路线路的高平顺性,必须对线路刚度有突变的地段进行过渡段的合理设置。本文在总结以往轨道过渡段模型的基础上,建立了有砟轨道和CRTSⅡ型板式无砟轨道过渡段的力学计算模型,通过分析静力作用下有砟—无砟轨道过渡段的垂向位移变形曲线形状,以及轮轨力和轨下基础反力大小的情况,来评价现
2、行刚度过渡形式过渡段的力学性能,并进一步对其进行优化。本文通过建立的过渡段力学计算模型,分析评价了现行过渡段形式-刚度线性过渡在力学性能上的缺陷与不足；既而提出了相应的优化措施,对比分析了过渡段刚度线性过渡、正弦曲线过渡以及抛物线和三次多项式组合曲线过渡三种刚度过渡形式在力学性能上的优劣性,以寻求一种更加适用于高速铁路发展的过渡段刚度过渡形式。本文还利用所建立的力学计算模型,从轨道刚度比、过渡段长度、行车速度等敏感性影响因素出发,对高速铁路路基上有砟—无砟轨道过渡段的静、动力学性能进行了因素对比
3、分析。本文的研究对于我国高速铁路过渡段的设计具有一定的参考价值。【英文摘要】TransitionSectionisgenerallytheweakestpartofahigh-speedrailway.Theexistingdifferencesofstrength,stiffnessaswellasfoundationsettlementaccountforirregulardeformationsandconsequentlyresultinunevennessofrailwayline.T
4、oensuretheexactevennessofhigh-speedrailwayline,itissignificantlynecessarytoappropriatelysetupTransitionSectionbetweenareasthatstiffnessremarkablydiffers.BasedonthegeneralizationofpreviousmodelsofTransitionSection,thispaperestablishedcomputationalmode
5、lsfortheballastedrailwaytrackandCRTSⅡslabballastlessrailwaytrack.Viaanalysesondifferentshapesofthedeformationcurvesofdifferentkindsoftransitionsectionsbetweenballastedrailwayareaandballastlessrailwaytrackareaunderacertainstaticforce,aswellastheanalys
6、esonthemagnitudeofwheel-railforcesandfoundationcounterforces,thispapertherebyevaluatedthemechanicalpropertiesoftransitionsectionswithdifferenttransitionforms,andfinallyoptimizedthem.Bymeansofthecomputationalmodelestablishedbytheauthor,thispaperanalyz
7、edtheweaknessanddeficiencyofthecurrenttransitionforms—linearstiffnesstransition,andthenproposedrelatedmethodsforoptimizing.Bycomparingthedifferencesonmechanicalpropertiesofthethreedifferenttransitionforms:linear,sinusoidalaswellascubicpolynomialstiff
8、nesstransitionswitheachother,thispaperendeavoredtofindabetterandmoresuitabletransitionformfortheever-accelerateddevelopmenthigh-speedrailway.Finally,thispaperalsousedthisfoundedmodeltocomparethosesensitivefactorssuchasRatioofTrackStiffness,Transition
