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参数化设计理论的研究

Research of Parametric Design Theory

【作者】 戴春来

【导师】 丁运亮;

【作者基本信息】 南京航空航天大学 , 飞行器设计, 2002, 博士

【摘要】 参数化设计技术是计算机辅助设计领域的一个重要研究内容,采用这种设计方法,可以快速有效地进行产品开发,因此有必要对参数化设计的理论做进一步研究。目前,参数化设计领域还有不少值得完善的方面,本文提出了一些新的参数化设计方法和理论,并用程序实现了本文提出的方法,表明这些方法是有效的。 本文提出了新的优化设计方法,给出的例子表明所提出的新的优化设计方法是有效的。在实际设计的过程中,欠约束问题是经常遇到的,对每一种类型欠约束问题的求解,本文归纳出了对应的求解方法,可以在程序中加以应用。 本文提出了基于匹配度计算的约束分解方法,采用这种方法,可以使约束分解的过程变得很简单,并可用于多自由度和多约束度变量的结构矩阵的分解。 针对几何约束求解的特点,本文提出了部分变量迭代求解算法,这样,在循环约束计算的时候,可以大大降低同时迭代变量的个数,增加了计算过程的稳定性。 针对上面提出的一些理论,本文用程序进行了实现,例子表明这些方法是有效地。 本文提出了基于变形曲线能量的概念,进行曲线相似变形的方法。这种方法有很多的用途,可以用于工业造型设计,也可以用于曲线的参数化变形。

【Abstract】 Parametric design is an important aspect of CAD field, with this method, the product can be design quickly and efficiently, so, it is necessary to do some research of the theory of parametric design. There .are many aspects in CAD that need to be enhanced, this paper presents some new methods and theories, which were realized with programming language. The result of programme shows these methods are efficient.This paper presents new optimum design method in CAD, the examples in this paper show this method is efficient. During design procedure, under-constrained problem is met usually, for each type of under-constrained problem, this paper generalizes associated solution method, which can be used in CAD programming.This paper presents a new method of sparse matrix decompose which is based on the concept of matched degree, this method can make the process much simple and can be used in the decomposition of the construct matrix with multiple-freedom variables and constraints.This paper presents partial-variable iteration method to solve recurrent-constraints. During the process of calculation the number of the iterated variables is decreased, which increases the stability of the process of calculation.This paper presents the method of curve deform which is based on the concept of the energy of deform curve. The method has many uses, such as the design of industry shaping and the parametric deform of spline-curve.

  • 【分类号】TP391.72
  • 【被引频次】207
  • 【下载频次】3799
  • 攻读期成果
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