软件移植关键技术研究及拉形成形仿真

【作者】 袁鸿；

【导师】 李靖谊；

【作者基本信息】 南京航空航天大学 ， 机械设计与理论， 2004， 硕士

【摘要】 SHEET-FORMING是运行于SGI／UNIX平台上的冲压成形有限元数值仿真软件包，其核心模块是前处理器、后处理器、求解器。基于软件工程思想，本文综合运用面向对象技术、结构化程序设计方法、WINDOWS进程间通信技术、FORTRAN／C++混合联编技术，对SHEET-FORMING的微机版本中的前、后处理器模块进行了研制：将前处理器模块进一步划分为四个功能模块；优化编译前、后处理器的图形显示部分代码并将其作为后台程序；设计WINDOWS风格的前台交互式图形界面；利用本文设计的中介程序实现后处理前台界面和后台程序之间的通信。试运行表明，将SHEET-FORMING从SGI／UNIX移植到PC／WINDOWS是基本成功的；本文的软件移植框架设计是合理的。 从拉形的基本原理出发，本文运用SHEET-FORMING对S形飞机蒙皮进行拉形成形的计算机仿真，包括有限元模型的建立、仿真参数的选择、加载成形、整体卸载回弹、切边卸载回弹；运用仿真结果计算回弹半径求出回弹量，并将分析计算结果与实际生产的回弹量对比。该研究对指导实际生产有一定的理论、现实意义。更多还原

【Abstract】 The FEM software package SHEET-FORMING is a punch-forming FEM analysis software package running on the SGI/UNIX graphic workstation, mostly including the pre-processor module, the post-processor module and the solving module. In this paper, with the help of the idea of software engineering, the object-oriented developing technique, structured software development method, the inter-process communications in WINDOWS and the FORTRAN/C++ mixed programming technique, the Windows version of the pre-processor and the post-processor module are developed: The pre-process module is parted as four function modules. The part of graphic display codes of the pre-processor and the post-processor module are translated and modified as background processes. The interactive graphic interface in Windows style is designed as foreground processes. With the help of the proxy program designed in this paper, the communication between the GUI program and the background program is realized. After its testing running: The transplant of SHEET-FOMRING from SGI/UNIX to PC/WINDOWS is basically successful, and the design of the framework of software transplant is reasonable.From the postulate of the Stretch-forming, with the help of SHEET-FORMING software, the computer simulation of the Stretch-forming of a S-shape aircraft skin is proposed in this paper, including the build of FEM mode, the preferences of simulation, the forming, the whole body spring back and the spring back after clipping. The spring back radius is calculated on the simulate results and contrasted with the reality. All these will pose great significance to production in theory and in reality.更多还原