Lessons learned during solutions of multidisciplinary design optimization problems

作     者：Patnaik, SN Coroneos, RM Hopkins, DA Lavelle, TM 

作者机构：Ohio Aersp Inst Brookpark OH 44142 USA NASA John H Glenn Res Ctr Cleveland OH 44135 USA 

出 版 物：《JOURNAL OF AIRCRAFT》 (飞机杂志)

年 卷 期：2002年第39卷第3期

页      面：386-393页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

主　　题：Multidisciplinary Design Optimization Supersonic Aircraft Cylindrical Shells Overall Pressure Ratio NASA Glenn Research Center Aircraft Engine Design Sequential Quadratic Programming High Pressure Turbine Poisson's Ratio Airbreathing Propulsion 

摘      要：Optimization research at NASA Glenn Research Center has addressed design of structures, aircraft, and aircraft engines. Four issues were encountered during the solution of the multidisciplinary problems. Strategy adapted for their resolution is discussed. Design optimization produced an inefficient design for an engine component. The deficiency was overcome through animation and weight was reduced by 20%. Infeasibility encountered in aircraft and engine design problems was alleviated by cascading multiple algorithms. The cascade strategy reduced aircraft weight and produced a feasible design. Profile optimization converged to an irregular shape for a beam. A regular shape was restored through engineering intuition, but the optimum freight was not changed. The subproblem optimization for a cylindrical shell converged to a design that might be difficult to manufacture. This issue remains a challenge. The issues are illustrated through design of an engine component, synthesis of a subsonic aircraft, operation optimization of a supersonic engine, design of a wave-rotor-topping device, profile optimization of a beam, and design of a cylindrical shell. A multidisciplinary problem might not Yield an optimum solution in the first attempt. However, the combined effort of designers and researchers can bring design optimization from academia to industry.