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1、第 I 页 共 37 页基于CATIA的桥壳设计与分析 毕 业 论 文（设计） 论文题目 基于catia的桥壳设计与分析 姓 名 学 号 院 系 机电学院 专 业 机械设计制造及其自动化 指导教师 中国合肥 二o一 六 年 六 月第 1 页 共 37 页基于CATIA的桥壳设计与分析摘 要作为汽车的主要承载件和传力件,驱动桥桥壳支撑着汽车的荷重,并将载荷传给车轮。作用在驱动车轮上的牵引力、制动力和侧向力,也是经过桥壳传到悬挂及车架或者车厢上。根据经验和理论研究,引起桥壳破坏的主要原因是作用在桥壳上的、路面不平度引起的冲击力和各种复杂工况下的作用力。由于汽车的行驶工况比较复杂,驱动桥桥壳的强度和
2、动态性能直接影响汽车运行安全,合理地设计桥壳也是提高汽车平顺性和舒适性的重要措施之一。因此,必须对桥壳强度、刚度和动态特性进行力学分析。本篇毕业设计（论文）题目是基于CATIA的桥壳设计与分析。首先介绍了驱动桥壳在国内外的发展现状，接而在CATIA中建立了桥壳的三维模型，并且通过在桥壳在不同工况下的静力分析和模态分析，直观的得到了驱动桥壳在各不同工况下的应力分布及变形情况。从而在保证驱动桥壳强度、刚度与动态性能要求的前提下，为桥壳设计提出可行的措施。关键词：有限元法;CATIA；驱动桥壳；静力分析；模态分析IAbstaact As the main bearing and passing co
3、mponents of the vehicle, the drive axle housing supports the weight of vehicle, and will transfer to the wheel load. The traction force, the braking force and the lateral force acting on the drive wheel are transmitted through the bridge shell to the suspension frame or the vehicle frame. According
4、to the experience and theoretical research, the main reason that causes the damage of the bridge shell is the impact force on the bridge shell, the road surface roughness and the force under different conditions. Due to the complex driving conditions, the strength and dynamic performance of the driv
5、e axle housing directly affect the safety of the vehicle, and the reasonable design of the axle housing is one of the important measures to improve the ride comfort and comfort of the vehicle. Therefore, it is necessary to analyze the strength, stiffness and dynamic characteristics of the bridge she
6、ll. This graduation project (Thesis) title is CATIA based bridge shell design and analysis. First introduced the drive axle housing in the domestic and foreign development present situation, then in CATIA established a three-dimensional model of the axle housing, and through on the bridge shell unde
7、r different conditions of static analysis and modal analysis and intuitive got in the drive axle under different working conditions of the stress distribution and deformation. Under the premise of ensuring the strength, rigidity and dynamic performance of the drive axle housing, the feasible measure
8、s are put forward for the design of the axle housing.Key words: finite element method; CATIA; drive axle housing; static analysis; modal analysisII目 录摘要IAbstractII第一章 绪论1 1.1 汽车桥壳的分类1 1.2 国内外研究现状 2 1.3 有限元分析方法及理论4 1.4 研究意义及主要内容 4 1.4.1 选题研究意义5 1.4.2 本文主要研究内容5 1.5 本章小结6第二章 驱动桥壳设计计算7 2.1静力学概述7 2.2桥壳的静弯曲应力计算8 2.3 桥壳的三种工况计算9 2.3.1 在不平路面冲击载荷作用工况10 2.3.2 汽车以最大牵引力行驶工况10 2.3.3 汽车紧急制动时工况14 2. 3. 4 汽车受最大侧向力工况16 2.4 本章小结22第三章 驱动桥壳几何模型的建立23 3.1 catia软件介绍23 3.2 几何建模的技巧24 3.3 桥壳几何建模过程24 3.4 本章小结25第四章 驱动桥壳有限元分析264.1 驱动桥壳有限元模型的建立264.2 驱动桥壳受力分析
