轨道交通桥梁阻尼器减振研究

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1、②申请同济大学工学硕士学位论文轨道交通桥梁阻尼器减振研究培养单位：一级学科：二级学科：研究生：指导教师：土木工程学院土木工程桥梁与隧道工程孙颖顾萍副教授二oo七年三月AbstractWhilethesixthvelocityupgradingofChinarailwayiscoming，theproblemthatsteeltrUSSbridges、“mshortspanandlightweightissufferinginefficiencyinstiffnessandgreatamplitudewillagainbefocused．Howtoeconomicallyandefficient

2、lysolvetheseU：afficsafetyproblemsandmaketheexistingagedbridgesgo01"1withtheirfunctionisrightontheschedule．TMD(TunedMassDamper)isavibrationobjectthatassembledinastructurewhoseamplitudeofvibrationneedstobereducedthe．UsingTMDtechnique，thevibrationCanberestrainedinthemainstructurebytransferringvibration

3、energytoTMD．TMDhastheeasy-understoodtheoryandithasbeenwidelyusedinmanyfields，howewcrbynOWithasnotbeenusedinconstrainingsteeltra$$bridges’vibration．ThisarticleisaimtomakeapplicationofTMDworkingontherailwaysteeltrussbridges．Itincludessomepointsasfollows：Firstly,a3DbeamelementmodalthatCantelltherealbri

4、dges’characteristicsofbearingforcewillbeconstructed．ItwilllatelybecheckedwithANSYS．whichisanall-powerfulfiniteelementsoftware．Secondly,vehiclemodal，whichissuitableforanalyzingvehicle—bridgecoupling，willbebuilt．Sinusoidalyawwavetheoryandirregularityoftracka托consideredaslateralspurringforceinthevehiel

5、e-bridgecouplinganalysis．Thirdly,fourtypesofTMDwhichcanreducelateralorverticalvibrationwilleffectinvehicle-bridgecouplingsystem．TheparametersofMTMDarealsostudiedtoanalyzetheinfluenceofreducingvibration．Fourth，amultifuactionalinterfaceprogramiscomposed,whichCallmakethecalculatingresultsvisualized．Fin

6、ally,twothrough—typesteeltrussbridgeswithspansof48mand64mareanalyzedwi也theeffectofMTMD．Agroupofoptimalparametersandsomesuggestionsarepresentedbased011theanalysisstudy．Keyword：vehicle-bridgecouplinganalyze，steeltrUSSbridges，ANSYS，Sinusoidalyawwavetheory,parametersofMTMD学位论文版权使用授权书本人完全了解同济大学关于收集、保存、使用

7、学位论文的规定，同意如下各项内容：按照学校要求提交学位论文的印刷本和电子版本；学校有权保存学位论文的印刷本和电子版，并采用影印、缩印、扫描、数字化或其它手段保存论文；学校有权提供目录检索以及提供本学位论文全文或者部分的阅览服务；学校有权按有关规定向国家有关部门或者机构送交论文的复印件和电子版；在不以赢利为目的的前提下，学校可以适当复制论文的部分或全部内容用于学术活动。学位论文作者签名：铡、篥k刎辟