The paper details the technology of secondary development and three kinds of secondary developing tools of ANSYS on the basis of finite element analysis software-AN SYS10.0. Lastly, a model unit analysis system of an automobile connecting road was developed based on Visual Basic 6.0 and APDL. The analysis system has friendly convenient and flexible man-machine conversation interface,while the complicated ANSYS command stream is encapsulated in background.It avoids large amount of repeated analysis work and improves the efficiency.% 本文以通用有限元分析软件AN SYS 10.0环境为基础，介绍AN SYS二次开发技术，以及三种开发工具。最后，以VB和APDL为手段，建立了一个柴油机连杆实例参数化分析系统。此系统具有友好、方便、易用的人机交互界面，对复杂、难于理解和掌握的ANSYS命令流进行了后台封装，避免了大量的重复性分析工作，提高了分析效率。
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