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선수 규칙파 중 단동 활주선의 연직면 거동 추정 - Zarnick 비선형 스트립 방법의 개선

Theoretical Prediction of Vertical Motion of Planing Monohull in Regular Head Waves - Improvement of Zarnick's Nonlinear Strip Method

  • 장양 (서울대학교 조선해양공학과) ;
  • 염덕준 (군산대학교 조선공학과) ;
  • 김동진 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Zhang, Yang (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Yum, Deuk-Joon (Department of Naval Architecture, Kunsan National University) ;
  • Kim, Dong-Jin (Korea Research Institute of Ships & Ocean Engineering.)
  • 투고 : 2015.04.10
  • 심사 : 2015.06.22
  • 발행 : 2015.06.30

초록

In order to predict the motions of a planing hull in waves, it is necessary to accurately estimate the force components acting on the hull such as the hydrodynamic force, buoyancy, and friction, as well as the wave exciting force. In particular, based on strip theory, hydrodynamic forces can be estimated by the summation of the forces acting on each cross-section of the hull. A non-linear strip method for planing hulls was mathematically developed by Zarnick, and his formula has been used to predict the vertical motions of prismatic planing hulls in regular waves. In this study, several improvements were added to Zarnick's formula to predict the vertical motions of warped planing hulls. Based on calm water model test results, the buoyancy force and moment correction coefficients were modified. Further improvements were made in the pile-up correction. Pile-up correction factors were changed according to variations of the deadrise angles using the results found in previous research. Using the same hull form, captive model tests were carried out in other recent research, and the results were compared with the present calculation results. The comparison showed reasonably good agreements between the model tests and present calculations.

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참고문헌

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