(毕业设计)标志206中级轿车悬架系统设计说明书

本科生毕业设计（论文）I摘要本次设计的主要内容是：标致206汽车的前、后悬架系统的结构设计。其前悬架采用目前比较流行的麦弗逊式独立悬架，后悬架采用拖曳臂式独立悬架。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：悬架设计；独立悬架；平顺性；自由度本科生毕业设计（论文）IIAbstractTheprojectmainlyincludesthedesignsofthefrontandsuspensionsystemofthePeugeot206Automobiles.TheindependentMcPhersonsuspensionincommonuseisadoptedinthefrontsuspensionsystem，TherearsuspensionisIndependentSuspensionArmdragTheshockabsorberwithtwo-directionhydraulic-cylinderisappliedhere.Thispapersintroducedthestructurecharacteristicsofthefrontandrearsuspension,determinedthesuspensionparameters,designedandcalculatedtheshockabsorbersandcoilspring,etc.Furthermore,aprogramforrideperformancecomputationiscompiledbyusingMATLABsoftware.Inthesuspensionanalysisofthesamplecar,amodelwithtwodegreeoffreedomsisestablished.Somecurvesforridequalityanalysisarecarriedout.Fromthecalculatedcurves,sometopicsonhowthesuspensionparameterseffectontheridecomfortarediscussed.Therefore,aconclusioncanbedrawnthatthecurrentdesignedsuspensionsystemhasagoodrideperformance.Keyword:Suspensionforkdesign;Independentsuspensionfork;Smoothness;Degreesoffreedom本科生毕业设计（论文）III目录第1章绪论..........................................................................................................1第2章前后悬架结构的选择................................................................................22.1汽车悬架的性能要求...............................................................................22.2悬架结构形式分析...................................................................................22.2.1悬架的分类....................................................................................22.2.2独立悬架结构形式........................................................................3第3章悬架技术参数确定计算............................................................................53.1自振频率...................................................................................................53.2悬架的刚度C............................................................................................63.3悬架的静挠度fc和动挠度fd..................................................................63.3.1悬架的静挠度fc............................................................................63.3.2悬架的动挠度fd............................................................................7第4章弹性元件的设计计算................................................................................84.1前悬架弹簧...............................................................................................84.2后悬架弹簧...............................................................................................9第5章悬架导向机构..........................................................................................115.1导向机构设计要求.................................................................................115.2麦弗逊独立悬架示意图.........................................................................115.3导向机构受力分析..................................................................................125.4横臂轴线布置方式.................................................................................14第6章减振器设计..............................................................................................156.1减震器的概述.........................................................................................156.2减振器分类............................................................................................156.3减振器参数选择.....................................................................................166.4减振器阻尼系数......................................................................................166.5最大卸荷力..............................................................................................176.6筒式减振器工作缸直径.........................................................................17第7章横向稳定杆设计......................................................................................197.1横向稳定杆作用.....................................................................................19本科生毕业设计（论文）IV7.2稳定杆直径计算....................................................................................19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.........................................................................238.4相对动载的幅频特性..............................................................................258.5悬架动挠度的幅频特性..........................................................................258.6影响平顺性的因素..................................................................................278.6.1结构参数对平顺性的影响.............................................................278.6.2使用因素对平顺性的影响.............................