机械结构对称破缺的概念、作用及其应用

发布时间：2018-01-14 23:30

本文关键词：机械结构对称破缺的概念、作用及其应用　出处：《浙江大学》2012年硕士论文　论文类型：学位论文

【摘要】：对称破缺是产品结构及其演化过程中的一个普遍现象,但目前国内外对此尚鲜有关注。作者收集了600余个机械结构对称破缺实例,采用统一标准逐个分析了对称破缺在实例中的存在方式和所起的作用。在此基础上,借助知识挖掘手段,展开机械结构对称破缺概念、作用及其应用的研究,主要研究内容和成果体现在以下四个方面： 1、机械结构对称破缺概念和分类体系的建立。通过对结构对称破缺实例的分析归纳并借鉴课题组结构对称的研究成果,提出了机械结构对称破缺的定义,建立了包括结构静态对称破缺、结构动态对称破缺和结构选择对称破缺等类型的分类体系。 2、结构对称破缺关联知识挖掘与分析。在构建机械结构对称破缺实例库和设计需求库后,利用关联知识挖掘算法对设计需求和结构对称破缺之间的关联关系进行了挖掘,并重点分析了其中支持度较高的几类关联知识,归纳了机械结构对称破缺在满足功能需求、性能需求和约束需求等方面的作用。 3、不对称匹配原理及其应用方法研究。在关联知识的启发下,结合对大量产品改进设计实例的人工分析,提出了不对称匹配原理及其四种分类,归纳了不对称匹配原理的应用方法和流程,从对称破缺的角度对产品的创新和改进设计作了有益探索。 4、机械结构对称破缺知识应用平台(KAPMSS)的开发。在上述理论研究的基础上,研制了集成实例管理、知识挖掘、知识管理、知识应用四大模块的机械结构对称破缺知识应用平台,将知识获取与知识应用有机结合在一起,并通过小型风力发电机的改进实例初步检验了平台的实用性。
[Abstract]:The symmetry breaking is a common phenomenon in the structure and evolution of the product , but at present there is little concern at home and abroad . The author collects more than 600 cases of symmetry breaking of mechanical structures , and analyzes the existence mode and function of symmetry breaking in the instance one by one . Based on this , the research on the concept , function and application of symmetry breaking of mechanical structure is carried out by means of knowledge mining means . The main research contents and achievements are embodied in the following four aspects : 1 . The conception and classification system of symmetry breaking of mechanical structure is established . By analyzing the structural symmetry breaking examples and using the research results of the structure symmetry of the research group , this paper puts forward the definition of symmetry breaking of the mechanical structure , and establishes a classification system including the structure static symmetry breaking , the structural dynamic symmetry breaking and the structure selection symmetry breaking . 2 . Knowledge mining and analysis of structural symmetry breaking . After constructing symmetry breaking instance library and design requirement database of mechanical structure , the association relation between design requirement and structural symmetry breaking is excavated by using the association knowledge mining algorithm , and several kinds of association knowledge with higher support degree are analyzed , and the function of symmetry breaking of mechanical structure in meeting functional requirements , performance requirements and constraint needs are summarized . 3 . The principle of asymmetric matching and its application method are studied . Based on the theory of correlative knowledge , this paper puts forward the principle of asymmetric matching and four kinds of classification , sums up the application methods and flow of asymmetric matching principle , and makes a useful exploration on the innovation and improvement design of the product from the angle of symmetry breaking . 4 . Based on the research of the above theory , the application platform of symmetry breaking knowledge of the mechanical structure of the four modules of integration instance management , knowledge mining , knowledge management and knowledge application is developed , and the knowledge acquisition and knowledge application are organically combined , and the practicability of the platform is preliminarily tested through an improved example of a small wind power generator .

【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH122

【引证文献】