少片變截面鋼板彈簧計算機模型的建立及其性能研究.pdf

1、湖南大學(xué)碩士學(xué)位論文少片變截面鋼板彈簧計算機模型的建立及其性能研究姓名：蘇嘉理申請學(xué)位級別：碩士專業(yè)：車輛工程指導(dǎo)教師：唐應(yīng)時20070205少片鋼板彈簧計算機模型的建立及其性能研究IIIAbstractLeafSpringisacommonelasticcomponentinthedependentsuspension.Ittransfersthefcemomentfromthewheeltothebodydecreasestheim

2、pactloadfromtheroadsurfaceattenuatesthevibrationduetothisimpactloadassurestheregularrunningofthevehicle.Leafspringalsoactsasaguidemechanismofthesuspensionwhichsimplifiesthestructuredesignofthesuspensionthemaintenancedecr

3、easestheproductioncost.Indertotakefulladvantageofthematerialtheleafspringisdesignedasabeamofconstantstrength.Oneoftheexamplesistaperleafspring.IndertoimprovethedesignofthetaperleafspringacomputationalmodelisconstructedCA

4、Eperfmanceanalysisisimplemented.Accdingtothetechnicaldrawingoftaperleafspringaparametricmodelisconstructed.Specificallyspeakingbyinputtingtheparameterssuchasdimensionscurvaturearchighasolidmodelofeachleafspringisconstruc

5、tedautomaticallyrespectively.Theparametricmethodsimplifiestheprocedureofmodelconstructionthecomingsimulationresearch.WiththehelpthesolidmodelanFEmodelofthetaperleafspringisconstructedbymappedmesh.Thefrictionbetweenleaves

6、issimulatedbyaddingcontactelementstothecontactsurfaceofeachleafspringbysettingrelevantparameters.Checkingtheassemblystressthespringstiffnessarethetwomethodsfthemodelvalidation.Aftertheassemblyofthetaperleafspringtheassem

7、blystressiscalculatedcomparedtothetheeticvalue.Thestiffnessiscalculatedintheelasticacteristicsimulationiscomparedtotheexperimentalvalue.Afmulaofstiffnesscalculatingisdeducedaccdingtomaterialmechanics.Afatigueanalysissimu

8、lationisimplementedwiththehelpoftheSNcurveofsimilarmaterial.Thefatiguedangerousareaislocatedthefatiguelifeiscalculatedwhichiscomparedtotheexperimentalresultfthevalidation.Therelationbetweenthethicknessoftheleafspringthef

9、atiguelifeisdiscussed.Themethodofdampacteristicsimulationisdesignedconsideringthefeasibilityofvalidatingbytheexperiment.Firstthewholeassemblyofleafspringiscompresseddownatacertainvalue.Thedefmationofeachleafisthenrecded.