(毕业设计)奇瑞微型汽车悬架系统设计毕业论文

本科生毕业设计（论文）I摘要随着汽车工业的发展，人们对汽车乘座舒适性和安全性的要求逐渐提高，因此对汽车悬架系统和减震器也提出了更高的要求。这次设计的微型汽车的悬架系统是有实际意义的。本次设计的主要内容是：奇瑞微型汽车的前、后悬架系统的结构设计。其前后悬架均采用目前比较流行的麦弗逊式独立悬架，减震器为液力双向作用筒式减震器。本说明书还包括前、后悬架性能和结构特点的介绍，悬架参数的确定，减震器设计及计算过程，螺旋弹簧设计及设计过程，悬架刚度和挠度的计算以及各零部件包括连接处的选择。并用MATLAB软件编程平顺性的分析，论证了该系统设计方案的正确性和可行性。在对样车悬架进行平顺性分析中，建立了两自由度的平顺性分析模型，分别绘制车身加速度幅频特性曲线、相对动载幅频特性曲线、弹簧动挠度幅频特性曲线分析了悬架参数对汽车平顺性的影响。因此，这次设计的悬架系统具有良好的行使平顺性。关键词：悬架系统；减震器；螺旋弹簧；导向机构；平顺性本科生毕业设计（论文）IIAbstractWiththedevelopmentoftheautomobileindustry,peoplehavebeenpromotingtherequirementforthesafetyandridecomfortofvehicles.Asaresultthereisabigdemandonthesuspensionandtheshockabsorbersystem.Thedesignofthemini-carsuspensionsystemisapracticalsense.TheprojectmainlyincludesthedesignsofthefrontandrearsuspensionsystemoftheCheryAutomobiles.TheindependentMcPhersonsuspensionincommonuseisadoptedinboththefrontandtherearsuspensionsystem.Theshockabsorberwithtwo-directionhydraulic-cylinderisappliedhere.Thispapersintroducedthestructurecharacteristicsofthefrontandrearsuspension,determinedthesuspensionparameters,designedandcalculatedtheshockabsorbersandcoilspring,etc.Furthermore,aprogramforrideperformancecomputationiscompiledbyusingMATLABsoftware.Inthesuspensionanalysisofthesamplecar,amodelwithtwodegreeoffreedomsisestablished.Somecurvesforridequalityanalysisarecarriedout.Fromthecalculatedcurves,sometopicsonhowthesuspensionparameterseffectontheridecomfortarediscussed.Therefore,aconclusioncanbedrawnthatthecurrentdesignedsuspensionsystemhasagoodrideperformance.Keywords:Suspensionsystem;Shockabsorber;Coilspring;Guidancemechanism;Rideperformance本科生毕业设计（论文）III目录第1章绪论..........................................................................................................11.1悬架简介...................................................................................................11.2设计要求：...............................................................................................2第2章前、后悬架结构的选择............................................................................32.1独立悬架结构特点....................................................................................32.2独立悬架结构形式分析............................................................................32.3辅助元件....................................................................................................4第3章技术参数确定与计算................................................................................53.1主要技术参数............................................................................................53.2悬架性能参数确定....................................................................................53.3悬架静挠度................................................................................................63.4悬架动挠度................................................................................................63.5悬架弹性特性曲线....................................................................................6第4章弹性元件的设计计算................................................................................74.1前悬架弹簧................................................................................................74.2后悬架弹簧................................................................................................8第5章悬架导向机构的设计..............................................................................105.1导向机构设计要求..................................................................................105.2麦弗逊独立悬架示意图..........................................................................105.3导向机构受力分析..................................................................................115.4横臂轴线布置方式..................................................................................135.5导向机构的布置参数.................................................错误!未定义书签。第6章减振器设计..............................................................................................146.1减振器概述..............................................................................................146.2减振器分类..............................................................................................146.3减振器参数选取......................................................................................156.4减振器阻尼系数......................................................................................156.5最大卸荷力..............................................................................................166.6筒式减振器主要尺寸..............................................................................16本科生毕业设计（论文）IV第7章横向稳定杆设计......................................................................................187.1横向稳定杆参数确定..............................................................................18第8章平顺性分析..............................................................................................218.1平顺性概念..............................................................................................218.2汽车的等效振动分析..............................................................................218.3车身加速度的幅频特性....................................................