高架軌道交通引起環(huán)境振動(dòng)的實(shí)測和理論分析研究.pdf

1、同濟(jì)大學(xué)博士學(xué)位論文高架軌道交通引起環(huán)境振動(dòng)的實(shí)測和理論分析研究姓名：張昕申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：防災(zāi)減災(zāi)工程及防護(hù)工程指導(dǎo)教師：蔣通2002.12.1AbstractThefirstelevatedrailroadthePearlLine，hasbeenconstructedandputintouseinShah曲ai，Chinaithasbroughtuswithgreatconvenience，atthemeantimeitals

2、ocancausemanyproblemssuchasvibrationInthispapertheorigin，propagationandattenuationofenvironmentalvibrationisstudiedbybethtestandtheorymethod，sothatwecanevaluateandforecasttheenvironmentalvibrationproducedbyelevatedrailro

3、adtrafficaccordingtopracticeThispaperiscomposedoftwoparts，testandtheorystudyInordertoobtaintheenvironmentalvibration’scharacteristicsofattenuationwithdistanceandthatoffrequencyinteststudyagoodmanyoftestsiscarriedoutonpro

4、pagationandattenuationofenvirunmantaIvibrationfoftypicalzoneofthePearILineStatisticregressanalysesaremadetowardthetestresultsofpropagationandattenuationofenvironmentalvibrationbymeansoflinearandnonlinearmethodsandstatist

5、icregressformulationsaregotforthefirsttime，ThedirectmethodandthefiltermethodareputfotwardinthispapertocalculatetheenvironmentalvibrationlevelusingrecordedaccelerationdataAndthetwomethodsarevalidatedbyallexampleThemeansto

6、calculatingbackgroundvibrationisbruughtforwardalsoThebackgroundvibrationofthezonesnearelevatedrailroadtrafficofSharIghaiisstudiedbythismeansAsfortheoryanalysisthecomplicatedsystemofenvironmentalvibration，whichismadeupoft

7、rain，bridge，flame，foundation(comprisedofpiles)andsoil，isdividedintotwosubstructuresThetrainbridgesubstructure’sdynamicanalysisismadeconsideringbothtrackirregularitiesandbridgebearing’selasticityandtheprogramsofWhichareco

8、mpiledByusingtheprograms，atypicaltrainbridgesystem’svibrationiscalculatedThefrequencydomainmethodisusedtosimulatetrackirregularitiesinthispaperAndtheresultsgotbythismethodfitwellwiththegivenpowerspectraldensityfunctionco

9、mparedwiththatofoftenusedtriangularseriesmethodAsfarastheanalysisofstructuremadeupofframe，foundation(comprisedofpil嘲andsoil，thefiniteelementmethodisusedconsideringviscousandelasticartificaIelementThetellablillyofviscouse

10、lementisverifiedbyseveralclassicproblemsofsoilstrueluredynamicinteractionAndthecomparebetweenthecalculationresultsandtherigoroussolutionsshowthattheviscouselementcadbeusedefficientlyonsoil一structureinteractionproblemsByt

11、hemeantimethedeterminationofelementsizeandmedelsizeisdiscussedalsoFurthermore，viscousandelasticaaificalelementisputforwardconsideringtheelasticforcebythesoiloutsideofthemodelAftertheanalysismethodoftheabovetwosubstructur

12、esisdetermined，theenvironmentalv；bralienproducedbyelevatedratlruadtrafficcanbecalculatedAndtheo嘲D鼬ebetweentheresultofcalculationandthatoftestshowsthatthemethodproposedinthispapercanbeusedtocalculatetheenvironmentalvibrat

13、ionproducedbyelevatedrailroadtrafficFinallybyusingtheabovemodel，theinfluenceoftrain’sspeedandtheweightofpassengerontheenvironmentalvibrationandthevibrationreductioneriectsoftrenchareanalyzedKeywords：elevatedrailroadtrail

14、]c，environmentalvibration，vibrationtest，vibrationlevel，propagationandattenuation，statisticregressanalysis，trainbridgedynamicanalysis，trackirregularities，bridge’selasticbearing，viscousandspringelement，finiteelementmethod，