인력 수중익선의 정적 종안정성 평가
Evaluation of Longitudinal Static Stability of Human Powered Hydrofoil Boat
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초록
In this paper, longitudinal static stability is investigated, which is an essential requirement for the safety and the performance of the human powered hydrofoil boat (HPHB). In case a disturbance changes the trim angle of the boat, the derivative of the moment about the center of gravity must be negative in order to make the boat to be stable. The equation to evaluate the longitudinal static stability of the EPISODE, a HPHB of Chungnam National University with a height controlling system(HCS) is derived. From the derivative it is confirmed that a longitudinal and vertical position of the center of gravity is important for a HPHB. The range of a trim angle while the boat is foil-born was found with a HCS under the condition of mechanical restraint. And it is confirmed that the longitudinal static stability is satisfied for EPISODE in certain range of a trim angle. It is also shown that the longitudinal static stability and a range of the trim angle can be determined from the principal dimensions of a HPHB, therefore, it can be applied from the stage of the conceptual design of HPHB.
Abstract
In this paper, longitudinal static stability is investigated, which is an essential requirement for the safety and the performance of the human powered hydrofoil boat (HPHB). In case a disturbance changes the trim angle of the boat, the derivative of the moment about the center of gravity must be negative in order to make the boat to be stable. The equation to evaluate the longitudinal static stability of the EPISODE, a HPHB of Chungnam National University with a height controlling system(HCS) is derived. From the derivative it is confirmed that a longitudinal and vertical position of the center of gravity is important for a HPHB. The range of a trim angle while the boat is foil-born was found with a HCS under the condition of mechanical restraint. And it is confirmed that the longitudinal static stability is satisfied for EPISODE in certain range of a trim angle. It is also shown that the longitudinal static stability and a range of the trim angle can be determined from the principal dimensions of a HPHB, therefore, it can be applied from the stage of the conceptual design of HPHB.
참고문헌 (5)
- Abbott I.H., "THEORY OF WING SECTION" (1959), Dover Publications, INC.
- Ha S.H., "Design for Human Powered Vessel "Poseria 2003" and Optimization of its Hydrofoil", Proceedings of the Annual Autumn Meeting, SNAK, pp.386~391 (2003)
- Lee S.J., "Fluid Mechanics Learning As History" (1999), Inter Vision
- Kim H.T., "Human and Solar Powered Vessel Festival 2008 - 10th Anniversary", 대한조선학회지, 46(2), pp.64~75 (2008)
- Min K.S., "Design of 4-Person Human Powered Vessel", Proceedings of the Annual Autumn Meeting, SNAK, pp.702~708 (2004)