【摘要】 传统的边界表示方式导致自由曲面特征仅包含几何信息,很显然这种表达方式是很低效的。为此提出了一种有效描述自由曲面特征的新方法,该方法基于陈述式的对象族模型构建自由曲面对象族,使自由曲面具有高层次的语义信息,可以保证自由曲面特征无缝地融合到模型中去,同时满足自由曲面特征与其他特征间的约束关系。通过约束定义自由曲面特征具有的语义信息,在建模过程中功能属性被很好地维护,实现了对自由曲面特征在参数化层次上的描述,并证明了其可行性。更多还原

【Abstract】 The blend features contained only geometric information on conventional Breps is inefficient.This paper proposed a new method to describe blend features,which built family of blend object based on declarative family of object model.The blend features,based on high-level semantic information,could be added to a model containing relations between all features in the model.It defined constraints to specify important semantic information,and maintained the semantic information during the whole modeling process.Experiments implement describing blend features at a parameterized level and demonstrate its feasibility.更多还原