车辆工程毕业设计14G63发动机曲轴设计及有限元分析.doc

摘　　要 本对四缸汽油机的曲柄连杆机构的主要零部件进行了结构设计计算，并对曲柄连杆机构进行了运动学和动力学的理论分析与计算机分析。首先，以运动学和动力学的理论知识为依据对曲柄连杆机构的运动规律以及在运动中的受力等问题进行详尽的分析并得到了精确的分析结果。其次分别对曲轴进行详细的结构设计并进行了结构强度和刚度的校核。再次，应用三维CAD软件：Pro/Engineer建立了曲柄连杆机构的几何模型 关键词：发动机；曲柄连杆机构；受力分析；  ABSTRACT The 4G63 engine design parameters as a reference, on four-cylinder gasoline engine crank crankshaft, etc. The main components of structural design calculations, and the crank was on the theory of kinematics and dynamics analysis Finite element analysis computer. First, the kinematics and dynamics of theoretical knowledge as the basis, the motion law of crank rod system and the structural problems in sports, and a comprehensive analysis of the precise analysis results obtained. Next to the crankshaft respectively detailed structure design, and a structure strength and stiffness checking. Again, use 3d CAD software: Pro/e established in crank rod system of crankshaft geometric model. And, as the main engine crankshaft, its performance movement part quality directly affect the engine reliability and life expectancy. In periodically dynamic load, crankshaft will produce alternating within the bending stress of the torsional stress, easily with the stress concentration areas such as transitional fillet bending fatigue damage occurred and twisting damage. With the engine crankshaft constantly strengthened, the more harsh working conditions. This paper to accord with the actual conditions of engine crankshaft modeling, using ANSYS, the three-dimensional finite element analysis of the whole of the crankshaft research, according to the deformation and stress conditions stress response results and material properties, checked with the strength of the load for design improvement, the analysis engine crankshaft provides theoretical basis. Key words: Engine；Crank；Stress Analysis；Crankshaft Pro / E；Finite Element Analysis 目　　录摘要 I Abstract II 第1章 绪论 1 1.1 选题的目的和意义 1 1.2 国内外的研究现状 2 1.3 设计研究的主要内容 3 第2章 曲柄连杆机构受力分析 5 2.1 曲柄连杆机构的类型及方案选择 5 2.2 曲柄连杆机构运动学