飞行器多学科设计优化概述

The summarization of multidisciplinary design optimization for flight vehicles

针对飞行器多学科设计优化进行了概述。提出多学科设计优化的综合性定义,介绍了国内外发展现状。指明多学科设计优化的组成要素和存在学科耦合、计算耗时两个难点,并认为其关键问题是离散设计变量和非数值型综合设计变量处理、工程综合评估、数据流管理等。阐述了可用于多学科设计优化的各种方法及其优缺点。并提出了多学科设计优化的研究重点。

A survey of MDO (Multidisciplinary Design Optimization) of flight vehicles is provided and the integrated definition of MDO is presented. The developing situation of MDO is introduced. The components of MDO have six aspects. The main difficulties of MDO are computational expense and organizational complexity. The first challenge comes from the analytical software of every discipline is very large and time consuming. The second obstacle reflects the complicated coupling relationship between disciplines. There are three key approaches to solve the difficulties. The first one is how to deal with discrete design variable and some non-numerical integrated design variables which are very important in conceptual design. The second is how to do engineering synthetic evaluation of analytical results of various disciplines. And the third is data flow management among various disciplines. Several methods available for MDO are described their advantages and disadvantages. Finally, the research suggestions are presented.