TBS无砟轨道结构设计与参数分析

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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