机械毕业设计（论文）-J75G-200闭式高速压力机结构有限元分析及改进设计【全套设计】.doc

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扬州大学广陵学院
本科生毕业设计


毕业设计题目J75G-200闭式高速压力机结构有限元分析及改进设计
学生姓名
专业机械设计制造及其自动化
班级机械81001
指导教师
完成日期 2014年 6 月 2 日
中文摘要
有限元分析和结构优化等CAE技术的应用,对于缩短产品开发周期,提高产品质量,降低制造成本,增强企业竞争力具有重要意义。本论文以压力机机身为研究对象,利用有限元分析软件ANSYS作为分析工具,进行有结构静态分析、结构优化设计以及模态分析。
首先,采用四面体实体单元建立机身的三维有限元模型,对压力机机身结构和受力特点进行分析,确定其载荷分布和约束,分析计算有限元模型,得到机身的应力与应变分布规律。校核机身部件的强度和刚度,并且根据分析的结果进行结构优化设计,通过较传统的人工优化找出了比较合理的结构,用加厚材料来矫正变形量过大的问题,用去除受力或变形小区域的材料来减轻质量等。
其次,运用ANSYS Workbench进行模态分析,分析其固有频率以及对应的振型。了解该压力机的模态特征和动态特征,为结构的动态设计和改进提供了理论依据和基础。
最后,对论文的研究内容进行了总结和展望。
关键词:压力机,有限元分析,优化设计,模态分析
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Abstract
The application of finite element analysis and structure optimization of CAE technology, to shorten the product development cycle, improve product quality, reduce manufacturing cost, is of great significance to enhance petitiveness of enterprises. The press frame as the research object, using finite element analysis software ANSYS as the analysis tool, a structural static analysis and modal analysis, structure optimization design.
First of all,to establish a three-dimensional finite element model of the frame using tetrahedron solid element, the press frame structure and force characteristics of the analysis, to determine the load distribution and constraints, calculation and analysis of finite element model, to get the stress and strain distribution. Check the strength and stiffness of body parts, and the structure optimization design based on the analysis of the results, a reasonable structure has been found by artificial optimization than traditional, with thicker materials to correct excessive deformation problem, remove stress or deformation small region of the material to reduce quality etc..
Secondly, the use of ANSYS Workbench analysis of modal analysis, the natural frequency and the corresponding vibration mode. Understand the modal characteristics of the press and the dynamic characteristic, has provided the theory basis and the foundation for dynamic design and structure imp