文档介绍：Classified Index: : 621 Dissertation for the Master Degree in Engineering DIGITAL ASSEMBLY PROCESS PLANNING AND SIMULATION OF TURBINE Candidate:Wang XianfeiSupervisor:Associate Prof. Chen XiaofengAcademic Degree Applied for:Master of EngineeringSpeciality:Mechatronics EngineeringAffiliation:School of Mechatronics EngineeringDate of Defence:June,2010Degree-Conferring-Institution:Harbin Institute of Technology哈尔滨工业大学工学硕士学位论文摘要数字化装配工艺规划与仿真可有效地缩短产品装配工艺设计和实现周期,对产品快速开发的实现具有重要意义。数字化装配工艺规划是近十余年来CAD/CAM领域的研究热点之一,但对于具有复杂结构的产品至今还没有实用的系统出现。本文在深入分析装配工艺规划与仿真技术的国内外研究现状基础之上,针对涡轮机的结构和装配工艺特点,提出了装配工艺规划与仿真系统中若干关键技术的解决方案,并且开发了涡轮机装配工艺规划与仿真系统。研究了支持装配工艺规划与仿真的装配模型建立与表达方法。提出基准链建模方法,将尺寸公差与形位公差用参数来表示,为静态装配仿真提供模型基础;采用层次结构和连接关系相结合的层次连接关系图来表达装配体,为用割集法产生装配序列提供条件;建立了装配规则库,为用知识Petri网进行装配工艺规划提供数据基础。研究了基于知识Petri网的装配工艺规划。提出了一种由产品层次连接关系图自动生成产品装配优化序列的方法。首先对产品层次连接关系图进行割集运算,并由此可得相应的产品装配层次与或图,再由此层次与或图构造出产品装配知识Petri网,运行知识Petri网后便可得到此产品的装配工艺。研究了面向装配生产过程的装配工艺仿真。提出了基于参数驱动和UG模型中检测两事例间最小距离算法的间隙分析方法;采用包容盒理论的干涉分析方法;根据装配序列规划产生的最佳装配序列,基于坐标变换制作装配仿真动画对装配过程进行仿真的方法。基于UG平台开发软件系统,包括装配工艺规划与装配仿真两个部分。能够完成装配工艺的生成与管理、装配数据的管理与维护、装配间隙分析与干涉分析、装配过程的仿真等功能,并应用某型号涡轮机转子作为实例对系统进行了验证。关键词:涡轮机;数字化装配工艺规划;知识Petri网;数字化装配仿真 I哈尔滨工业大学工学硕士学位论文Abstract Digital assembly process planning and simulation can effectively shorten the cycle of assembly design and production, which is important to rapidly development of product. Digital assembly process planning is active research area of CAD/CAM in recent years, however so far there is not practical system for product assemblies plex structure. Based on deep analysis of current research literature, this paper proposes solutions to several key techniques of digital assembly process planning and simulation and develops a prototype system for turbine. This dissertation studies assembly model and its construction methods for assembly process planning and simulation. Chain modeling method is proposed to provide a model for the static assembly simulation, parameters is used to represent th