铰接式转向架构架疲劳寿命研究的开题报告标题：铰接式转向架构架疲劳寿命研究摘要：铰接式转向架是一种常见的车辆转向结构，广泛应用于大型公路客车、城市公交车等。在长期使用过程中，其构架会因疲劳受到损伤，严重影响其安全性能。因此，对铰接式转向架结构的疲劳寿命进行研究，有重要的理论和实际意义。本文将探讨铰接式转向架的组成结构、疲劳损伤原因及其分类，并介绍疲劳寿命的概念与影响因素。通过应用有限元分析方法，建立铰接式转向架的力学模型，并通过实验数据的验证，探究其疲劳寿命影响因素与疲劳寿命预测模型。研究结果表明，铰接式转向架的疲劳寿命主要受到工作载荷、材料性能、结构设计等因素的影响。其中，结构设计是最重要的因素，对于提高铰接式转向架的疲劳寿命，应对其结构进行优化改进。关键字：铰接式转向架；疲劳寿命；有限元分析；结构优化Abstract:Thearticulatedsteeringsystemisacommonvehiclesteeringstructureandiswidelyusedinlarge-scalehighwaypassengercars,citybuses,etc.Duringlong-termuse,thestructureofthearticulatedsteeringsystemwillbedamagedduetofatigue,severelyaffectingitssafetyperformance.Therefore,itisofgreattheoreticalandpracticalsignificancetostudythefatiguelifeofthearticulatedsteeringstructure.Thisarticlewillexplorethecompositionstructureofthearticulatedsteeringsystem,thecausesandclassificationoffatiguedamage,andintroducetheconceptoffatiguelifeandinfluencingfactors.Byapplyingfiniteelementanalysismethod,establishingthemechanicalmodelofthearticulatedsteeringsystem,andverifyingitwithexperimentaldata,thispaperinvestigatestheinfluencingfactorsoffatiguelifeandfatiguelifepredictionmodel.Theresultsshowthatthefatiguelifeofthearticulatedsteeringsystemismainlyaffectedbyworkingload,materialperformance,structuraldesignandotherfactors.Amongthem,structuraldesignisthemostimportantfactor.Toimprovethefatiguelifeofthearticulatedsteeringsystem,itsstructureshouldbeoptimizedandimproved.Keywords:articulatedsteeringsystem;fatiguelife;finiteelementanalysis;structuraloptimization