驱动桥壳设计毕业设计论文.doc

摘要
由于驱动桥壳是汽车的重要部件,所以驱动桥壳的使用寿命会直接影响汽车的有效使用寿命,故应具有足够的强度、刚度和良好的动态特性。
本论文首先利用Unigraphics软件对驱动桥壳进行合理地三维建模,然后将其以Parasolid的格式导入ANSYS软件并以静、动态分析理论为基础做有限元分析,得出桥壳在三种典型工况下的应力分布和变形结果以及在自由状态下的14阶固有频率和振型。
通过对驱动桥壳的力分析,找到了驱动桥壳最大应力和最容易引起断裂的部位。最后,利用研究成果对驱动桥壳的结构和材料要求提出改进措施,并解决驱动桥壳断裂问题。
结果表明,该桥壳具有足够的静强度和刚度;最小非零固有频率大于50Hz,不会引起桥壳共振。
关键词:驱动桥壳;Unigraphics; ANSYS;有限元分析
ABSTRACT
Being the automobile's important part, automobile's effective service life is directly influenced by the driving axle housing. So it should have enough intensity, rigidity and dynamic characteristic.
Firstly, the Unigraphics software is used to create a reasonable three-dimensional model of the driving axle housing. Then, the model is imported to ANSYS software in Parasolid format .And then finite element analysis can be done on the basis of theory analysis of static and dynamic state. In this way, the stress distribution and deformation in three typical work axle housing cases can be drawn from the analysis. Meanwhile, 14 natural frequencies and mode shapes can also be drawn.
Through analyzing the strength of the driving axle housing, the biggest stress spot of the driving axle housing can be found. Finally, using the results of the research, effective methods are used to improve the structure of the driving axle housing, and the requirements of materials, and to solve the fracture problems.
The results show that the driving axle housing has enough static strength and stiffness; the minimal nonzero inherent frequency is greater than 50Hz which won’t cause bridge shell resonance.

Key words:Drive axle housing;Unigraphics;ANSYS;The finite element analysis
目录
第一章绪论 1
引言 1
研究背景 2
国内外研究现状 3
课题研究的意义和目的 3
课题的来源和主要研究内容 4
汽车驱动桥桥壳概述 5
汽车驱动桥桥壳的分类特点 5
驱动桥桥壳的作用 5
驱动桥机械传动要求 6
结构强度分析要求 6
汽车后桥设计的关键技术 7
第二章有限元法理论及其在汽车设计中的应用 8
有限元法的概述 8
有限元法的发展历史 8
有限元方法的分析过程 8
有限元分析软件ANSYS的简介 9
有限元方法在汽车工业中的应用 10
有限元法在汽车设计中的运用 10
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