【摘要】 目前的参数化软件只能提供产品的几何设计支持 ,即设计人员在屏幕上绘制产品的几何形状 ,然后通过修改屏幕上几何形状的尺寸对设计结果进行修改 ,很不直观。为此 ,文中提出了两层设计方法 ,应用该方法 ,设计者可以通过增加工程约束的方法 ,使所设计的几何形状与产品模型建立联系 ,从而在对设计结果修改时可以通过熟悉的工程语义进行。同时 ,该方法还允许不同产品设计共用同一个几何体 ,从而大大提高设计效率更多还原

【Abstract】 Parametric design assists designers powerfully in their design procedure.The very attractive point is that this method can provide facilities for designers to alter their design flexibly.Nowadays, parametric software only supports geometry design, i.e. drawing the shape of a geometry on the screen and altering it through dimensions not directly perceived visually.Thus , a two layer design method was proposed.Through this method , the designer is permitted to use engineering constraint, therefore , the design can be modified through engineering terminology.At the same time, it is also permitted that one geometry being used in several designed products, so design efficiency can be raised.更多还原