Research Of Multidisciplinary Design Optimization

Multidisciplinary Design Optimization (MDO) is an emerging, new engineering discipline. Since it can solve the problem of large-scale complex engineering system's design, it has widely potential application in the field of aerospace engineering. As an initial research of MDO within China, this thesis includes the whole architecture of MDO. The emphasis are on the analysis and improvement of a distributed concurrent approach-Collaborative Optimization (CO).The main contents of this thesis are as follows:1.This thesis discusses all the components of MDO interiorly for the first time. Based on these components and the author's experience, this thesis constructs a complete architecture of MDO, and describes the content of this architecture in detail.2.Considering the compute difficulty induced by CO in some practical design, this thesis deeply discusses the ultimate reason of producing the compute difficulty from two angles of both optimization theory and examples. This thesis also presents several approaches to overcome the compute difficulty, and evaluates these approaches.3.Based on former researches, this thesis presents a new creationary method which combines CO with a modem optimization arithmetic-Simulated Annealing (SA). This thesis also improves the standard CO and constructs a new architecture named Simulated Annealing Based Collaborative Optimization (CO-SA) in term of this method. The results of examples prove that the solution ability of CO-SA is much better than standard CO.The research of this thesis focuses on the analysis and improvement of MDO theory and method. The purpose is to provide a significative foundation for the developments of MDO in China.