有限元法分析与建模课程设计报告报告题目：基于ANSYSWorkbench的叶轮结构强度和振动模态分析学院：机械电子工程学院指导教师：学生及学号：摘要涡轮增压器是一种高速回转的叶片机械，一旦出现故障，特别是运动部分发生故障，将导致整个增压器在极短时间内损坏。随着涡轮增压器压比及转速的不断提高，增压器转子叶轮部分的结构可靠性分析变得愈为重要。对某型号增压器叶轮系统使用Catia建立简化的模型，并使用ANSYSWorkbench有限元分析软件对叶轮系统进行静强度分析，得到最大应力与转速的曲线。以及对叶轮预应力振动模态分析，得到叶轮的自振频率和振型。为涡轮增压器叶轮系统的优化设计和动力学分析提供依据。关键词：涡轮增压器叶轮有限元法静强度分析模态分析ABSTRACTTheturbochargerisahigh-speedrotatingblademechanic,onceafailure,especiallymovingpartsfailurewillcausetheentireturbochargerdamageinaveryshorttime.Withthecontinuousimprovementoftheturbochargerpressureratioandrotationalspeed,turbochargerimpellerrotorstructurereliabilityanalysisbecomemoreimportant.TheuseofacertaintypeofturbochargerimpellersystembyCatiaestablishasimplifiedmodel,andtheuseoffiniteelementanalysissoftwareANSYSWorkbenchanalysistheimpellersystemstaticstrength,getacorrelativecurvewithmaximumstressandspeed.AndtheimpellerprestressedModalanalysis,gettheimpellernaturalfrequenciesandmodeshapes.Providethebasisforoptimizingthedesignanddynamicsanalysisturbochargerimpellersystem.Keywords:Turbocharger,Impeller,FEM,Staticstrengthanalysis,Modalanalysis目录第1章引言...................................................................................................................11.1有限元法及其优越性.......................................................................................11.2ANSYSWorkbench及其优点.........................................................................11.3问题的工程背景...............................................................................................1第2章叶轮强度计算...................................................................................................22.1静强度分析.......................................................................................................22.2静强度分析步骤...............................................................................................22.3材料特性定义...................................................................................................42.4网格划分...........................................................................................................52.5载荷和约束施加...............................................................................................82.6计算结果及分析...............................................................................................92.6.1叶轮应力分析.........................................................................................92.6.2叶轮应变与变形...................................................................................14第3章叶轮振动模态计算........................................................................................163.1叶轮的振动与模态.........................................................................................163.2带预应力模态分析步骤.................................................................................163.3计算结果与分析.............................................................................................18第4章总结........................................
