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Research on Integrated Computer-Aided Design Systems toward Fusion with Engineering Simulation Technologies

与工程仿真技术融合的集成计算机辅助设计系统研究

基本信息

批准号：
08405016
负责人：
AKAGI Shinsuke
金额：
$ 10.69万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

This project studied the next-generation integrated CAD systems after various computer simulation technologies have become available in ordinary design activities. While simulation technologies are indispensable for design evaluation, design is natively synthetic activities, and it is necessary to integrate simulation technology outcomes and design synthesis activities. Under this circumstance, we researched into object modeling methods, distributed design systems and optimization techniques. The research results are summarized as follows :(a) A configuration centered modeling framework was proposed as a key technology toward the above integration, which has abilities to manage hierarchical design information, to deduct simulation models and so forth. This modeling was also applied to a design problem of an air-conditioner unit, where some components are arranged and several pipes are routed.(b) An agent-based distributed design system architecture was developed for concurrent design processes of large, complicated systems. This architecture can integrate isolated design systems through computer network in accordance with system structure of engineering systems. An experimental design system was implemented for basic ship design for ascertainment of the architecture.(c) A genetic algorithm based design optimization method was developed for large-scale multi-objective design problems of practical engineering systems, physical phenomena of which are too ill-posed to apply ordinary design optimization methods. This method was applied to the preliminary optimal design problem of an automotive engine.(d) Futher, the issues toward integration of design syntheses in conceptual and configuration phases were discussed with a design problem of chain-type mechanism systems as a forthcoming research direction.

该项目研究了各种计算机模拟技术应用于普通设计活动后的下一代集成 CAD 系统。虽然仿真技术对于设计评估是不可或缺的，但设计本质上是综合活动，有必要将仿真技术成果与设计综合活动相结合。在这种情况下，我们研究了对象建模方法、分布式设计系统和优化技术。研究结果概括如下：(a)提出了一种以配置为中心的建模框架作为实现上述集成的关键技术，该框架具有管理分层设计信息、推导仿真模型等能力。该建模还应用于空调机组的设计问题，其中布置了一些组件并布置了多条管道。(b)开发了一种基于代理的分布式设计系统架构，用于大型复杂系统的并行设计过程。该体系结构可以按照工程系统的体系结构，通过计算机网络集成孤立的设计系统。 (c)针对实际工程系统的大规模多目标设计问题，开发了一种基于遗传算法的设计优化方法，这些问题的物理现象不适用于普通的设计优化方法。该方法应用于汽车发动机的初步优化设计问题。(d)进一步讨论了概念阶段和配置阶段的设计综合集成问题，并将链式机构系统的设计问题作为未来的研究方向。