| Nonlinear Aeroelastic Analysis in Time Domain for Folded Fins using ZAERO |
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Dong-Min Lee, Jung-Young Kim |
| ZAERO를 이용한 시간영역에서의 접는 날개 비선형 공탄성 해석 |
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이동민, 김정영 |
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국방과학연구소 |
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| Abstract |
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The purpose of this paper is to study the impact of concentrated nonlinearities, freeplays, on the aeroelastic behaviors of single- and double-folded control fins. The nonlinearities may cause limit cycle oscillation(LCO) below the linear flutter boundary. The effects of nonlinear hinges on LCO characteristics of the fins are examined as flight condition changes. Nonlinear time-domain flutter analyses are performed, using ZAERO. The results show that the aeroelastic stability boundaries of double-folded fin(DF) are higher than those of the single-folded fin(SF) and the lower hinge freeplay impact more critically on the stability than the upper hinge freeplay of the DF. |
| Key Words:
Nonlinear Aeroelastic Analysis, Time-Domain, Freeplay, Folded Fins, Limit Cycle Oscillation, ZAERO |
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