浮置板轨道隔振性能研究

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1、上海交通大学硕士学位论文浮置板轨道隔振性能研究姓名：王炯申请学位级别：硕士专业：机械设计及理论指导教师：吴天行20070417系统参数设计的设计建议，并给出了浮置板轨道的模拟参数设计方案。综上所述，本文的研究重点及创新之处主要集中在四点：采用连续系统对浮置板轨道建模；车辆、轨道以及浮置板三大系统耦合计算；在频域中求解耦合的高阶偏微分方程；分析各参数对浮置板轨道隔振性能的影响，给出了浮置板轨道参数设计的设计步骤建议。关键词浮置板，隔振，欧拉梁，固有频率，耦合动力学iiSTUDYONVIBRATIONISOLATIO

2、NPERFORMANCEOFFLOATINGSLABTRACKABSTRACTUndergroudrailwaysarebecomingmoreandmorepopularnowadaysinourcities,whiletheproblemofvibrationandsoundbroughtbythemetroisalsoaverybigdeal.Therehasaveryeffectivewaytoreducethevibrationandsound,thatisthefloatingslabtrack(FS

3、T).Thebasictheoryoffloatingslabtrackistoaddamass-springsystemwithverylownaturefrequencybetweentherailandtheinfrastructuretoisolatethevibrationfromtheinfrastructure.Thoughsomemethodshavebeendevelopedtoanalyzetheisolationperformanceoffloatingslabtrack,butsomesh

4、ortagesstillexist.Firstly,generallytheanalysistotheFSTissimplifiedtoasystemwithonedegreeoffreedomandthedynamiccharacteristicoftherailandthefloatingslabarenotconsidered.thustheanalysistotheFSTisnotsoaccurate.Secondly,theexcitationissimplifiedasasimpleharmonics

5、timulationandthedynamiccharacteristicofthevehicleisalsonotconsidered.Forthefirstproblem,wehavedevelopedthesingleanddoubleinfinityEulerbeamfortheFSTsystems.ThesingleEulerbeamisfortheFSTsystemwithshortfloatingslabandthedoubleEulerbeamisfortheFSTsystemwithlongfl

6、oatingslab.Frothesecondproblem,thecoupledvehicle-railmodelcanalsobeusedintheFSTsystems.Wecouplethevehicle,railandthefloatingslabtogetherhereandformafullmethodtocalculatethebehavioroftheFST.iiiBecauseofthecomplexityoftheproblem,thewaytodealwithfourorderpartial

7、differentialequationisalsodescribedinthispaper.ForsingleEulerbeam,wewillsolvetheequationbythemethodofboundaryconditionandforthedoubleEulerbeam,wewillsolvetheequationbythemethodofLaplacetransformation.Aseriesofdetailedanalysistotheresultofthecalculationisthema

8、inpointofthepaper.WeinvestigatehowtheparametersofFSTinfluencetheisolationperformanceoftheFSTandwewillgivesomeadvicetotheparameterdesignofFST.Astimulationcalculationwillbegiventoverifythed