S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Mechanical Aerospace Engineering (기계항공공학부) Others_기계항공공학부
크리깅 기반 모델과 매개변수법을 이용한 다중물체의 다단계 형상 최적설계
MULTI-STAGE SHAPE OPTIMIZATION FOR MULTI-BODY GEOMETRIES USING KRIGING-BASED MODEL AND ADJOINT METHOD
- 임진우; 김종암
- Issue Date
- 한국전산유체공학회 2011년도 추계학술대회, pp. 279-285
- 공학; Aerodynamic shape optimization; 공력형상최적설계; Kriging; 크리깅; Expected Improvement; EI; Discrete adjoint method; 차분매개변수법
- An efficient and high-fidelity design approach for wing-body configuration is presented. Depending on the nature of the design space and the number of design variables, aerodynamic shape optimization is carried out at each design stage via a selective optimization strategy. In the first stage, global optimization techniques are applied to planform design with a few geometric design variables using Genetic Algorithm based on Kriging-EI method. In the second stage, local optimization technique based on discrete adjoint method is employed for wing surface design with numerous design variables which can maintain a sufficient design space with a high DOF (Degree of Freedom) geometric change. By the use of the proposed optimization method, drag minimization is performed in inviscid and viscous flow conditions and the performance of the multi-stage design strategy are compared with the single stage design approach using the drag decomposition method.