날개끝 스토어 형상 항공기 복합재 날개 구조의 MDO 연구

This paper presents MDO(Multidisciplinary Design Optimization) study results for aircraft composite wing structure with tip store. The objective is to identify key design parameters in the composite wing structure design process. The store location and the effect of the store aerodynamics and mass are the variables included. The ICW(Intermediate Complexity Wing) wing box model is optimized with constraints on the static strength, manufacturing limit and flutter speed. The thicknesses and the cross-sectional areas of the structural elements are the design variables in the optimization. The MSC/NASTRAN is the primary tool used in this study. Failure criteria of composite laminate are examined regarding the practical design. The aerodynamics of the tip store significantly affects the aeroelastic instability of ICW model. The aeroelastic instability of the optimized structure is very sensitive to the tip store movement along the tip chord. The present results indicate that the selection of tip store model fidelity is very important during the design process.