汽车桥壳的有限元分析毕业设计

洛阳理工学院毕业设计（论文）I汽车桥壳的有限元分析摘要随着汽车工业的高速发展，对汽车性能的要求越来越高，这使得传统的驱动桥桥壳的设计计算方法已经无法满足现代汽车设计的需要。电子计算机的出现以及有限元的飞速发展为驱动桥壳的结构性能的计算分析带来了新的革命。由于驱动桥桥壳是汽车重要的承载件和传力件，桥壳的性能和疲劳寿命直接影响着汽车的有效使用寿命。因此，驱动桥壳应有足够的强度、刚度和良好的疲劳耐久特性。合理设计驱动桥壳也是提高汽车安全性和舒适性的重要措施。论文利用Pro/E建模软件建立高顶单胎14A-B型汽车驱动桥壳的3D模型，采用最新的ANSYS协同仿真有限元平台，按国家驱动桥壳台架试验的标准，在计算机中对5.0mm、6.0mm、6.5mm三种厚度驱动桥壳进行有限元分析，其中包括垂直弯曲刚度和静强度的分析。有限元分析结果表明，5.0mm厚桥壳的垂直静强度不符合规范要求，6.0mm、6.5mm厚的两种桥壳满足规范要求。最后，结合工程实例做了桥壳的失效分析，找出桥壳失效的原因是垂直静强度不够、某些装配部位应力过大。并提出相应的改进意见，以供参考。关键词：驱动桥桥壳，ANSYS，垂直弯曲刚度，静强度，失效分析洛阳理工学院毕业设计（论文）IIAUTOMOBILEBRIDGESHELLFINITEELEMENTANALYSISABSTRACTWiththeautoindustryhighspeeddevelopment,thefunctiontotheautomobiledemandsmoreandmorehighly,thefeasibletraditiondesignsoftheautomobiledriveaxlehousingalreadyhaven’tsatisfytherequestthatmodemdesigns.Thecalculationanalysisthattheelectroniccomputerappearingdevelopsatfullspeedforthestructuredesignsaswellasfiniteelementmethodafterhasbroughtaboutnewrevolution.Sincetheaxlehousingismainlycarryingandpassingcomponentsofthevehicle,theaxlehousingfunctionandfatiguelifehavedirectimpacttoeffectiveautomobileusefultime,theaxlehousingshouldhavesufficientintensity,stiffnessandwelldurablefatigueproperty.Therefore,theaxlehousingdesignsarealsotoimproveautomobilesafetyandthecomfortablenessimportancerationallymethods.ThethesismakesuseofPro/Esoftwarebuildingthe3Dmodelsof14A-Btype’saxlehousing.UsingANSYSworkbenchFEAsimulatedplatform,accordingtothenationalstandardofdriveaxlehousingtests,threetypesthicknessdriveaxlehousinghassimulatedbyFEAon5.0mm,6.0mm,6.5mminthecomputerhasincludedverticalcurvesjustdegreeandstartintensityanalysis.Staticanalysisofresultindicatesthattheperpendicularityintensityandfatiguestrengthofthe5.0mmaxlehousingisunqualified,6.0mm,6.5mmtwotypes’axlehousingcomeuptothenationalstandard.End,wedgebondingengineeringsolidinstancethelapsethatmadebridgehousinganalysis,findingoutthereasonofbridgehousinglapseisperpendicularstatintensitynotenoughandsomeassemblypartstressoverbig.Andthesubmissionscorrespondofbettermentopiniontoprovideareference.KEYWORDS:Driveaxlehousing,ANSYSWorkbench,Theverticalcurvesjustadegree,Quietintensity,Failureanalysis洛阳理工学院毕业设计（论文）III目录前言................................................................................................1第1章绪论......................................................................................21.1汽车桥壳的分类和机构特征概述.....................................21.2汽车桥壳CAE分析的研究和发展......................................31.2.1国外CAE的发展和现状论述....................................31.2.2国内CAE分析的发展和现状....................................41.3本课题的工程背景和研究意义............................................41.4本文的主要研究内容和技术路线........................................51.4.1本文的主要研究内容.................................................51.4.2技术路线流程图.........................................................51.5小结......................................................................................6第2章有限元基本方法和桥壳有限元模型....................................72.1有限元基本方法及其计算工具简介....................................72.1.1有限元方法及其理论.................................................72.1.2ANSYS系列通用有限元软件.....................................82.214A-B型汽车桥壳的实体模型和有限元模型.................102.2.1桥壳实体模型...........................................................102.2.2有限元模型、网络划分和单元介绍........................112.2.3驱动桥桥壳模型材料介绍........................................122.3小结....................................................................................12第3章驱动桥的受力特征及结构静力分析..................................143.1汽车驱动桥桥台试验.........................................................143.1.1驱动桥桥壳垂直弯曲刚度和静强度试验简介.........143.1.2垂直弯曲刚度和静强度试验评估指标....................143.2桥壳受力特征.....................................................................153.2.1约束情况...................................................................153.2.2载荷施加方式...........................................................163.3有限元分析.........................................................................16洛阳理工学院毕业设计（论文）IV3.4小结....................................................................................18第4章静力分析结果.....................................................................194.1垂直弯曲刚度分析结果对比..............................................194.2垂直弯曲静强度分析结果对比..........................................224.3小结....................................................................................25第5章桥壳失效原因及改进意见.................................................275.1分析失效原因的目的.........................................................275.2分析的一般步骤.................................................................275.3失效原因及改进意见.........................................................275.4小结....................................................................................28结论..............................................................................................29谢辞................................................................................................30参考文献.....................................................................