The Development of the Knowledge Base System to Assist the Optimal Design of Ship Structure.

自20世纪60年代以来，自动进行设计修改的优化设计理论已经发展起来，但优化设计在制造企业产品设计中的实际应用却很少。在大多数情况下，设计变更是根据工程师的经验进行的，很少有设计工程师根据数学理论进行设计。本研究将人工智能应用于优化设计系统的开发，使优化设计更加人性化。介绍了建模阶段和求解阶段。建模阶段是用数学术语来表达设计。它自动生成数学规划所需的数学表达式。求解阶段是智能非线性规划算法的发展阶段。在传统的数学规划方法中加入了推理辅助。最后，提出了大型结构多级优化的优化设计方法，将结构分成若干部分，在对各部分进行优化的同时对整体结构进行优化。这一过程与实际工程产品的设计过程是一致的，在实际的设计过程中，多位工程师相互协作，共同进行设计。

The theory of optimal design that gives design modification automatically has been developed since '60^<th>, but the real application of the optimal design used in the product design of manufacturing company is rare. In most of the cases the design changes are made based on the experience of the engineer, and very few design engineers are doing their design based on the mathematical theory.In this study, the artificial intelligence are used to develop the optimal design system that will help doing optimal design in more friendly way. Two phases, namely modeling phase and solution phase are introduced. The modeling phase is the expression of the design in terms of mathematical terms. It automatically generates the mathematical expression needed in the mathematical programming. Solution phase is the development of the intelligent algorithm of nonlinear programming. The assistance of the reasoning is added to traditional mathematical programming method.Finally, the optimal design of large scale structure by multi-level optimization is proposed by dividing the structure into several parts, and optimizing each parts while over all structure is also optimized at the same time. This process has consistency with the real design process of engineering products in which several engineer cooperate each other to develop the design.