高速列車(chē)車(chē)體智能結(jié)構(gòu)減振技術(shù)研究.pdf

1、西南交通大學(xué)碩士學(xué)位論文高速列車(chē)車(chē)體智能結(jié)構(gòu)減振技術(shù)研究姓名：陳維通申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：載運(yùn)工具運(yùn)用工程指導(dǎo)教師：曾京201205西南交通大學(xué)碩士研究生學(xué)位論文第1I頁(yè)AbstractWiththerapiddevelopmentofhighspeedrailwaytechnologies，theenhancementofrunningperformanceandridecomfortforpassengercarsisunceas

2、inglyrequiredTherideperformanceiscloselyrelatedwiththeelasticvibrationofcarbodyMeanwhile，thecarbodylighteningofhighspeedtraincausestheelasticvibrationproblemofcarbody，whichinevitablyreducestheridecomfortforpassengersInor

3、dertosolvethisproblem，alotoftheoreticalandexperimentalresearcheshavebeencarriedoutfortheCarbodyhomeandabroad，includingtheconstraineddampingprocessing，variablestiffnessstructure，passiveandactivevibrationcontrol，etcHowever

4、，westillneedtoexplorecontinuallytoacquirethesolutionwhichcanbeappliedtotheactualvehiclePreviousstudiesindicatethattheactivecontrolbasedonpiezoelectricsmartstructureisanefficientwayforcarbodyelasticvibrationreductionThrou

5、ghsummarizingtheexistingresearchesandusingthemethodofbeingfromsimpletocomplexitythealgebraicrelationbetweenoutputtorqueandcontrolvoltageofthe7cpiezoelectricpileactuatorsisderivedTheactivevibrationcontrollawbasedonpiezoel

6、ectricintellectualstructuresisobtainedbyusingthecantileverbeamtestmodelThen，theverticaldynamicmodelofhigh—speedvehiclewithconsideringthecarbodyelasticeffectandpiezoelectricactuatorisestablishedThematchrelationsbetweencar

7、bodystructurefrequenciesandbogieflamevibrationfrequenciesarestudiedFinally，theactivecontrolsimulationofvehicleelasticvibrationisrealizedbasedontheindependentmodalshapecontr01Bystudyingthestructuralstrainsundertheeffectof

8、eachmode，itisknownthatthepiezoelectricactuatorsshouldbeinstalledinthemaximumstrainpointsofthestructures，ie，therootofthecantileverbeamandthemidofthevehicleThefeaturesofvibrationcontrolofpiezoelectriccantileverbeamandtheco