基于三级驱动模型的产品数字化设计策略与方法

Strategy and Method of Digital Design Based on Three-level-drive Model

数字化设计是实施大批量定制的重要技术之一,建立设计模型是实现数字化设计自动求解的关键。通过深入分析产品设计知识,提出了基于需求参数→关键参数→结构参数三级驱动模型的数字化设计策略与方法。一级驱动以需求参数为输入,由方案设计系统推理及优化得出产品关键参数,二级驱动以关键参数为输入,驱动根据层次化策略建立的基于各种性能和结构推导的约束网络模型,得到各零部件的细化结构参数,三级驱动以细化结构参数为输入,驱动参数化的几何模型及远程的有限元分析模型,进行可视化几何与性能验证,同时基于Web技术实现了分布式数字化设计。以浙江省某起重机械厂的QD型桥式起重机数字化设计为例说明了上述策略和方法的有效性。

Digital design is an important tactic for mass customization. It is a key technique to establish an effective design model. Through analyzing design knowledge, a method of digital design based on a three-level-drive model which included demand parameters, key parameters and structure parameters was proposed. Demand parameters were the input of first-level drive, where product key parameters were obtained through product scheme design system and optimization model. Key parameters were the input of second-level drive, where a hierarchical strategy was advised to establish constraint network model, so that detail structure parameters of parts can be derived. Detail structure parameters were the input of third-level drive which could drive parametric geometry model and remote finite element analysis model to validate the design. Web-based technology was also employed to facilitate the distributed digital design. The whole strategy and method were put into practice in a crane factory, and proved to be applicable and effective.