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ID:36431745
大小:4.82 MB
页数:89页
时间:2019-05-10
《TBS无砟轨道结构设计与参数分析》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、中南大学硕士学位论文TBS无砟轨道结构设计与参数分析姓名:刘永存申请学位级别:硕士专业:道路与铁道工程指导教师:娄平20090501深引起的系统动态响应变化几乎成线性关系,且随着波深的加大而加剧。3、郑武高速试验段轨道随机不平顺样本幅值大约为4mm左右,其对列车一轨道耦合系统动力响应影响较小,平顺性较好。可见,对于高速铁路而言,维持线路的高平顺性是列车安全舒适运行的重要保障。关键词TBS无砟轨道,多重叠合梁,参数分析,轨道随机不平顺IIABSTRACTWiththerapiddevelopmentofpassenge
2、rdedicatedlinesandcitymasstransitinChina,ballastlesstrackwasdevelopedrapidlyforlessmaintenanceornomaintenance.nispaperfocusesonthetwin-blockssleeperembeddingballastlesstrack(becalledTBSballastlesstrackforshort)widelyusedinWuhan-GuangzhouPassengerDedicatedLine,a
3、ndappliesthecompositebeammethodandtrain-trackcouplingdynamicstoanalyzethecouplingsystem.AcompositebeammethodinstaticsiSappliedfortheparametersanalysisandoptimumdesignofTBS’upperstructurallayer.Theresultsshowthatthethicknessandtheelasticitymodulusoftrackbedshoul
4、dnotbetoolarge,thereasonablethicknessandthereasonableelasticitymodulusiSapproximately200mmand32500N/mmz.Ontheotherhand,withtheincreaseofthewidthoftrackbed.thethicknessofsupporting.1ayerandtheelasticitymodulusoftheanti-freezinglayer,一一一thestressofupperstructural
5、layerdecreases.Thereforeweshouldtakesomemeasurestoincreasethesti【ffnessoffoundationtoreducethestresslevelofupperstructurallayerandmaintainthestabilityoffoundationengineering.Astothethicknessofsupporting-layerandthewidthoftrackbed,wecouldadopt300mmand2800mmrespe
6、ctivelyaccordingtotheexperienceofGermany.Inthelightofthecharacteristicsofthesystemverticalvibration,amodelwiththree.1ayerbeamelementiSemployedtosimulatethetracksystem.Thevibrationequationofthetrain—trackcouplingsystemareformulatedbyusingtheprincipleoftotalpoten
7、tialenergywithstationaryvalueinelasticsystemdynamicsandthe“set-in—right-position’ruleforformulatingmatrixes.Themodelisappliedforanalyzingtheparametersofthetrain.trackcouplingsystem,suchasthenumberofvehicles,thelengthoftrack,therunningspeedoftrain,thetypeofrail,
8、thestiffnessoffastener.andthestiffnessoffoundationect.TheresultsindicatethattheIIInumberofvehiclesandthelengthoftrackhavealittleeffectsonthedynamicresponseofsystem.theheaver
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