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摘要：提出基于改进方法的系统整体流程的参数化设计模式，以土石坝参数化设计为例，
应用参数化设计软件GC 为开发平台，实现完整参数化设计系统的开发流程。首先利用几何因
果推理技术确定土石坝坝体模块几何元素的构建序列；然后使用约束驱动技术实现土石坝坝体
模块参数的动态修改；最后使用特征模型技术实现用户自定义的土石坝坝体模块特征库的构建
和模型装配。实验结果表明综合运用这三种技术能有效解决各个技术中的局限性，提高参数化
设计的效率。
Abstract: Based on a case study of earth-rock dam parametric design and the development platform#br# of parametric design software generative component (GC), a new design pattern is proposed which is#br# used to extract the design process parameters of whole system. Geometric causal reasoning#br# techniques are used to firstly determine the order of the earth-rock model feature points, and then the#br# constraint-driven technology is utilized to modify the module parameters of rock fill dam. Feature#br# modeling techniques are used to achieve user-defined features library and assembly model. The#br# experiments prove that the combination of the three techniques can solve the drawbacks of the#br# techniques, improve the efficiency of parametric design, and realize parametric design.
