【作者】 兰丽华；

【导师】 江渡；

【作者基本信息】 大连铁道学院 ， 机械设计与理论， 2002， 硕士

【摘要】 随着三维图形技术和计算机技术的发展，三维设计已经成为CAD技术应用的必然趋势。目前，三维CAD技术在铁路客车设计方面的应用主要集中在铁路客车产品的三维实体造型、产品的有限元分析、标准件库的建立等方面，而对整车的比较全面的三维设计尚处于探索阶段。本论文开发了铁路客车车体钢结构的三维参数化CAD系统，不仅可以提高设计效率和设计质量，而且对产品的有限元分析具有一定的实用价值和参考意义，同时也符合了现代技术的发展要求。 本论文是在Windows 2000的微机操作平台上，在VC++6.0的编译环境中利用Pro／TOOLKIT对Pro／ENGINEER进行二次开发，建立的一个客车车体钢结构的三维参数化CAD系统。本论文对系统总体进行了分析和设计，将系统的参数设计模块划分为总体设计模块、部件设计模块和零件设计模块，每个模块下面又有各自的子模块；利用面向对象技术，对设计对象、设计参数和模型进行分类；通过对车体钢结构的三维参数化设计方法的研究，提出了实现参数化的两个途径，分别是建立参数化模型库和模型的参数化装配；利用Pro／ENGINEER参数化特性建立了系统参数化零件模型库和装配关系模型库；在Pro／TOOLKIT应用程序中实现了模型的参数化装配：对Pro／ENGINEER的二次开发技术进行了研究，并建立了扩展功能函数库；建立了系统的数据管理库；以VC++6.0为开发工具，开发了系统友好的用户界面。更多还原

【Abstract】 With the development of three-dimensional graphic technique and computer technique, three-dimensional design has been already inevitable tendency of CAD application. At present , the application of three-demensional CAD technique on passenger train design mainly focuses on three-demensonal solid modeling finite element analysis building standardized component library, and so on. Overall three-demensional design on the whole passenger train is at the stage of searching. This thesis develops three-demensional parametric CAD system on the steel structure of passenger train body. It not only improves design efficiency and design quality, but also has certain practical value and referenced signficance for the finite element analysis of products. This also fits in with development require of modern technique.This thesis is three-dimensional parametric CAD system on the steel structure of passenger train body, which is developed and runs on Windows 2000 platform. It is secondary development to Pro/ENGINEER by using Pro/TOOLKIT, and VC++6.0 is used as a compiler. This thesis analyses the system, and divides parameter design modular to three submodulars, which are overall design modular component design modular and part design modular. Each modular has own submodulars. Design objects > design parameters and models are classfied by using object-oriented technique. The thesis puts forward two ways to realize parametric design, which are building parametric model library and parametric assembling models. It builds parametric part model library and assembly relation model library by using Pro/ENGINEER, and realizes parametric assembling model in the Pro/TOOLKIT application program. Secondary development technique onPro/ENGINEER is studied, and extended functional function library is built. A user-friend interface is developed by using VC++6.0 as developing tool.更多还原