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CAS 복합재료 항공기 날개의 에일러론 역전 특성 연구
송오섭(Ohseop Song),김근택(Keun-Taek Kim) 한국항공우주학회 2009 韓國航空宇宙學會誌 Vol.37 No.12
본 논문에서는 굽힘-비틀림 연성운동이 일어나는 CAS 형태의 이방성 복합재료 항공기 날개의 에일러론 역전 특성에 관한 해석적인 연구를 수행하였다. 복합재료 날개는 박판보로 모델링되었다. 복합재료 날개의 에일러론 역전 특성에 관한 연구에서, 횡전단변형 및 와핑구속, 굽힘-비틀림 연성, 후퇴각, 날개의 가로세로비, 날개와 에일러론의 길이비 및 시위비, 등을 고려하는 것이 필요하다. 얇은 벽 보의 항공기 날개에 대한 보다 더 효과적인 설계를 위해, 에일러론 역전 특성과 관련한 연구 결과는 매우 중요한 역할을 담당할 수 있을 것이다. This paper deals with an analytical study on the aileron reversal characteristics of anisotropic composite aircraft wings modelled as thin-walled beam and having bending-torsion structural couplings caused by Circumferentially Asymmetric Stiffness layup scheme. For a study on the aileron reversal of CAS composite wings, it is essential to consider the following effects such as warping restraint, transverse shear flexibility, bending-twist structural coupling, wing aspect ratio, ratio of span-wise and chord-wise length of aileron to wing, and sweep angle, etc. The results on the aileron reversal could have a significant role in more efficient designs of thin-walled composite wing aircraft for which this aeroelastic instability is one of the most critical ones.
송오섭(OhSeop Song),박상윤(Sangyun Park),강성환(Sunghwan Kang),서정석(Jungseok Seo),김선홍(Sunhong Kim) 한국소음진동공학회 2013 한국소음진동공학회 학술대회논문집 Vol.2013 No.10
This paper contains various vibration analysis of multi-stage shaft shape such as the bending, torsional and axial vibration.The shaft system is modeled as Timoshenko beam with the transverse shear and rotary inertia effect and the equation of motion is derived by Hamilton’s principle with considering clamped-free boundary condition. Then, eigenvalue problem of discrete equation of motion for multi-stage shaft model is solved and got results of the natural frequency through the numerical analysis. Obtained numerical analysis results through Matlab program were compared with those of FEM analysis to verify the results. This study suggests that design of shaft system be consider torsional and axial vibration as well as bending vibration.