机车转向架构架疲劳寿命预测

《机车转向架构架疲劳寿命预测》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、西南交通大学硕士学位论文机车转向架构架疲劳寿命预测姓名：邓锐申请学位级别：硕士专业：车辆工程指导教师：翟婉明20081201西南交通大学硕士研究生学位论文第1I页一-————————-——●——————————_———_——————_———————-—__-——-—l———————__一AbstractForalongtime，bogieframeasakeystructuralcomponentofrailwayvehiclesystem，thestructuralstrengthandfatiguelifearewidelyconcer

2、ned．Theintensityofaframecanbeensuredbythecalculationcombiningwiththecorrespondingtheoryatthedesignstage．Theframefatiguelifeassessmentunderdynamicloadsisdonebyadoptingfatiguetestonlyafterthecompletionofthemanufacture．Ifthetestingresultsshowthatthefatiguestrengthofthistypefr

3、amedoesn’tsatisfydesignrequirementorservicelife，theframeshouldbeimprovedorredesigned．It’Sobviouslyincompatibewithmoderndesignconceptswhichmustshortenproductdevelopmentcyclesandminimizethemanufacturingcost．Basedonthelatestfatigueresearchresultsathomeandabroad，thepaperistoac

4、hievethelocomotivebogieframefatiguelifeassessmentViatheMulti．Bodysystemdynamicsimulation，thefiniteelementmethodandfatiguelifepredictionatthedesignstage．Firstly,thewholelocomotivedynamicmodelwasestablishedusingtheSIMPACKsoftwareaccordingtotheactualstructuralparameters．AUthe

5、10adhistories，whichwereusedtoevaluatethebogieframefatiguelife，wouldbeobtainedbythedynamicperformancesimulationunderthetypicallocomotiveoperationcondtions·Secondly,thesolidmodeloftheflamewasestablishedusingthe3DsoftwareSolidWorks．Thefiniteelementanalysisoftheframewasachieve

6、dthroughtheconnectionbetweenme3DsoftwareandANSYSsoftware，includingthestaticstressanalysis，quasi—staticstressanalysisandmodalanalysis．Finally,combiningtheS—Ncurvesofthematerialandweld，theloadhistoriesactingontheframeandtheresultsofthequasi-staticstressanalysis，choosingtheap

7、propriatefatiguelifepredictionmethod，theframefatiguelifeevaluationWasdoneusingthenSoftsoftware．ThemostweaknesspositionWasconfirmedandthentheparticularfatiguelifeanalysis西南交通大学硕士研究生学位论文第1II页wasdone．Theabovefatiguelifepredictionmethodbasedonthevirtualtechiniquecallpredictthe

8、stressdistributionatthedesignstageandprovidethetheoryinstructionforthestructuraloptimizat