【作者】 邹纯稳；

【导师】 张树有；

【作者基本信息】 浙江大学 ， 机械设计及理论， 2010， 博士

【摘要】 本文以零件的结构变异设计为研究对象,提出了结构移植的零件变异设计方法。在建立零件可变异设计模型的基础上,对零件基结构的多粒度细分与重组技术,结构移植的映射拓扑搭接技术和结构移植的桥接拓扑搭接技术等进行了深入的研究。运用提出的理论和方法,开发了结构移植的零件变异设计系统,并在数控机床等产品的设计中进行了应用。全文的组织结构为：第一章：分析了零件变异设计技术与产品变型设计技术间的关系,综述了产品变型设计技术与零件变异设计技术的研究及应用现状。在对相关理论和技术进行归纳分析的同时,阐述了论文的研究背景、内容和意义。第二章：零件可变异设计模型的构建是结构移植的零件变异设计的基础。本章针对结构移植的零件变异设计的需要,将零件及零件基结构的功能、几何和语义等信息进行融合,定义了零件可变异设计模型,并重点分析了零件基结构间的结构关联关系和零件可变异设计模型的再生方法。第三章：零件基结构的多粒度细分与重组技术为零件变异基结构的高效获取提供了途径。本章归纳了零件变异基结构的三种基本类型：独立型、包含型和组合型；针对确定零件变异基结构的技术需要,提出了基于虚拟切割的结构细分方法和基于信息融合的结构重组方法。通过细分与重组方法的综合运用,可以确定多粒度、复杂多样的零件变异基结构,从而拓展了结构移植的零件变异设计方法的应用领域。第四章：结构移植的拓扑搭接技术是结构移植的零件变异设计的关键技术。本章首先给出拓扑搭接面的概念,根据拓扑搭接面的类型将结构移植的拓扑搭接进行分类：规则曲面搭接(叠合搭接、平面搭接、圆柱面搭接、平面-规则曲面搭接)和自由曲面搭接。并针对规则曲面搭接提出了结构移植的映射拓扑搭接方法：平移变换映射搭接、旋转变换映射搭接、混合映射搭接和零件变异设计过程的映射联动。第五章：为了解决自由曲面的拓扑搭接问题,提出了结构移植的桥接拓扑搭接方法。通过对移植结构的预处理,将搭接问题进行技术转化,引入二维两点间Hermite插值曲线方法,通过对设计参数进行三维推广,得到Hermite插值曲面；最后,将目标搭接面、参照搭接面和连接曲面所围成的封闭区域实体化,得到自由曲面拓扑搭接连接桥,实现自由曲面的拓扑搭接。第六章：运用论文提出的理论和方法,开发了结构移植的零件变异设计系统,并在数控机床等产品的设计中进行了实施和应用,验证了本文提出的结构移植的零件变异设计理论及方法的正确性和可行性。第七章：总结了本文的主要研究内容和成果,并给出了今后有待进一步研究的工作和方向。更多还原

【Abstract】 This dissertation takes the part structural variant design as the investigative object, and a method for part variant design with structure transplantation is proposed. Based on the part variable model, subdivision and reorganization of part unit structure, as well as the methods of mapping topology faying and bridging topology faying for structure transplantation are studied. Furthermore, a system for part variant design with structure transplantation is developed based on the new method, which is testified in the design of numerical control machines and other complex products.The main work of this dissertation is as follows:In chapter 1, the relationship of part variant design and product variant design is analyzed. An overview of product variant design and part variant design is provided. Along with the analysis of related theories and technologies, the research background, the main content and the meaning of this dissertation are stated.In chapter 2, the construction of part variable design model is the basis of part variant design with structure transplantation. According to the need of part variant design, by merging the functional, geometric and semantic information of part and part unit structure, part variable design model is defined. And the association of each part unit structure and the regeneration method for part variable model are elaborated.In chapter 3, the subdivision and reorganization methods for part unit structure are discussed. First, three basic types of part variant unit structure are classified as: independent type, included type and combined type. Then, based on the needs for the determination of part variant unit structure, virtual cutting based subdivision method and information merge based structure reorganization method for part unit structure are proposed. With the combination of subdivision and reorganization method, many more part variant unit structures of various grades can be determined, and the application of part variant design with structure transplantation is greatly expensed.In chapter 4, topology faying method is the key technology in part variant design with structure transplantation. Firstly, the concept of topology faying surface is defined, and based on the types of topology faying surface, the topology faying of structure transplantation is divided into two types:regular surface faying (overlapped faying, plane faying, cylinder faying, plane-regular surface faying) and free-form surface faying. For regular surface faying, the mapping topology faying design is proposed, including translated transform mapping faying, rotated transform mapping faying, blend mapping faying and coordinated mapping motion for the variant design process.In chapter 5, to solve the problem of free-form surface topology faying, the bridging topology faying method is proposed. First, transplantation structure is pre-processed, faying problem is technically transformed, and with the introduction of Hermite interpolation curve method and 3-D promotion of design parameters, Hermite interpolation surface is obtained; then, with the materialization of the closed region formed by reference faying surface, target faying surface and connecting surface, the bridge of free surface topology faying is acquired, thus the topology faying of free surface is realized.In chapter 6, a system for part variant design with structure transplantation is developed. The prototype system is applied in the design of some typical parts of numerical control machine and other complex products, which shows the validity and feasibility of the new theory and method proposed in this dissertation.In chapter 7, conclusions are given along with recommendations for the future research.更多还原