新型橡胶隔振器浮置板轨道结构参数设计与环境振动评价

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1、万方数据西南交通大学硕士研究生学位论文第1I页曼曼寰曼苎!曼苎!!!!!舅曼曼!I!曼苎曼!!!!曼兰曼皇!曼皇皇蔓曼曼!曼曼曼苎!!曼!曼皇苎!!AbstractAnincreasingnumberofurbanrailtransitconstructionwereputintouseinourcountry,whichmeetsthecity'sefficienttraveldemand，however,italsoproducesanewsourceofvibrationandnoisepollution．Thenewtyperubberv

2、ibrationisolatorfloatingslabtrack，whichhaslaidthetestlineandmadeagoodtestresultsinforeigncountry,hassomegoodDroperties：suchashighisolationefficiency,convenientlifting，andeasytorepair．However,fewaDplicabilityresearcheswereconductedaboutthedesignoffloatingslabinourcountry,sofur

3、therresearchonthepropertiesanddesignaboutthiskindoffloatingslabtrackisnecessarY·Basedonthedomesticandinternationaldataaboutthefrequently—usedvibrationiso．1ationinurbanrailwaysystem，andtheresultsfromthestudiesaboutnewtypevibrationis01ationintestlines．Inordertogetthesystemicdyn

4、amicparametersofthenew啪efloat．mgslabtrackwithrubbervibrationisolator，thefiniteelementsoftwareANASYSwasusedinthispapertoanalyzethenaturalfrequencyandtoevaluatethestructuralstrengthoffloatmgslab．ThenthedynamicresponsewithdrivingconditionsoffloatingslabwasanalvzedthroughANSYS／LS

5、．DYNA．FinallyABAQUSandthetheoryofinfiniteboundarywere硫egratedtoestablishatunnel—soil3Ddynamicfiniteelementmodel，thismodelcanbeusedtostudythevibrationattenuationlawandevaluatethedampingeffectoffloatingslabtrackwithrubbervibrationisolator．Theresultsshowthat：1．Modelfrequencyoffl

6、oatingslabsystemisinproportiontotheverticalstiffness，butinconverseproportiontothequalityoffloatingslab；efficiencyoffloatingslabtrackwithrubbervibrationisolatorwasimprovedbyincreasingthequalityoffloatingslab，increasingdistancebetweendia’erentisolators，reducingthestiffness．Howe

7、ver,theabovementionedmethodmightbringoutsomedisadvantageaboutthesafetyanddurabilityinthestructure·2．Basedontheconsiderationoffloatingplatestrengthcalculationandeconomicfactors．2．5mdistancefromcontiguousrubbervibrationisolatorwithverticalstiffness12·5kN／mmisrecommendedinthelay

8、outplan．3．V沁ratbnenergyproducedwhiledrivingcannottransfertothetunnel