河南科技学院 2013届本科毕业论文（设计）

论文题目：基于ANSYS的轴承座的模态分析 学生姓名： 刘x 所在院系： 机电学院 所学专业： 机械设计及其自动化 导师姓名： 完成时间： 2013年5月8日 摘要 轴承座在机械生产中很常见，在各类机器、机构中都有它存在的身影，由于轴承座本身结构并不是太复杂， 所以本文并没有借助其他类型的三维软件建模， 而是在ANSYS环境下 建立的模型。轴承座的受力主要是分布在轴承孔圆周上， 还有轴承孔的下半部分的径向压力载荷。为了提高结构的抗振性，本文借助于ANSYS软件强大的模态分析功能，运用ANSYS软件建立了轴承座的三维模型，并对轴承座进行模态分析，并给出前20阶的固有频率和振型，以此来指导结构的优化设计[1]。

关键字：轴承座，模态分析，有限元，ANSYS

Abstract Bearing seat is common in the machinery manufacturing, it exists in all kinds of machine, figure, because the bearing seat structure itself is not too complicated, so this article does not use other types of 3 d software modeling, but established under ANSYS environment model. Stress is mainly distributed in the bearing hole of the bearing on the circumference of a circle, and the bearing hole of the bottom half of the radial pressure load. In order to improve the vibration resistance of structure, in this paper, with the aid of powerful modal analysis function of ANSYS software, and the 3 d model of the bearing was established by applying the ANSYS software, and the modal analysis was carried out on the bearing seat, and give the top 20 order natural frequency and vibration mode, in order to guide the optimization design of structure.

Keywords: bearing seat，modal analysis，finite element ，ANSYS 目录 1 引言 ........................................................................................................................... 1 2 ANSYS概述和分析步骤 ........................................................................................... 1 2.1 概述.................................................................................................................. 1 2.1.1 ANSYS简介 ........................................................................................... 1 2.1.2 ANSYS主要的应用的领域 ................................................................... 1 2.1.3 ANSYS的主要功能 ............................................................................... 2 2.1.4 ANSYS提供的分析类型 ....................................................................... 2 2.1.5 ANSYS的操作界面 ............................................................................... 3 2.2 ANSYS分析步骤 ............................................................................................. 4 2.2.1 创建有限元模型.................................................................................. 4 2.2.2 施加载荷进行求解................................................................................ 4 2.2.3. 后处理................................................................................................. 5 3 轴承座的实体建模 ................................................................................................... 5 3.1 建立模型的典型步骤...................................................................................... 6 3.2 轴承座建模...................................................................................................... 6 4 轴承座的模态分析 ................................................................................................. 11 4.1 模态分析理论及分析过程............................................................................ 11 4.2 模态分析步骤............................................................................................... 11 4.2.1指定分析标题并设臵分析范畴........................................................... 11 4.2.2定义单元类型....................................................................................... 11 4.2.3 划分网格............................................................................................ 12 4.2.4 进入求解器并指定分析类型和选项 ............................................. 12 4.2.5 施加边界条件 ................................................................................... 13 4.2.6执行求解 ............................................................................................. 13 4.2.7 列出固有频率 ................................................................................... 13 4.2.8查看模态形状 .................................................................................... 13 4.2.9模态分析结果 .................................................................................... 15 5结论 .......................................................................................................................... 15 6 总结 ......................................................................................................................... 15 致谢 ............................................................................................................................. 17 参考文献 ..................................................................................................................... 18