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사고 선박의 예인력 계산 및 실험에 관한 연구

A Study on the Calculation of Towing Force for the Disabled Ship and Its Experiments

  • 남택근 (목포해양대학교 기관시스템공학부) ;
  • 정창현 (목포해양대학교 해상운송시스템학부) ;
  • 김진만 (목포해양대학교 기관공학과 대학원) ;
  • 최혁진 (선박해양플랜트연구소(KRISO))
  • Nam, Taek-Kun (Division of Marine Engineering, National Mokpo Maritime University) ;
  • Jung, Chang-Hyun (Division of Maritime Transportation System, National Mokpo Maritime University) ;
  • Kim, Jin-Man (Department of Marine Engineering, Graduate school of National Mokpo Maritime University) ;
  • Choi, Hyuek-Jin (Division of Maritime Safety, KRISO)
  • 투고 : 2014.07.08
  • 심사 : 2014.10.02
  • 발행 : 2014.10.31

초록

본 논문에서는 선박의 예인에 필요한 예인력의 계산과 이를 검증하기 위한 실험 결과에 대해 언급하고 있다. 먼저 예인력의 계산에 있어서는 선박의 마찰저항, 풍압저항, 조파저항을 고려하였다. 아울러 프로펠러가 고착된 상태를 가정하여 프로펠러 저항을 계산하였다. 이와 더불어 예인 시 사용되는 예인삭에 걸리는 부가저항을 노드분석법을 적용하여 계산하였고, 선체 저항과 예인삭에서의 부가저항을 합하여 최종적인 예인저항을 도출하였다. 계산된 결과값의 유효성을 검증하기 위하여 목포해양대학교 실습선 새유달호를 활용하여 해상에서 예인실험을 수행하였고 이론적인 계산 결과와 실험 결과에 대한 비교를 행하였다. 소요 예인력의 이론적인 계산에서 주요한 요소는 예인속력임을 알 수 있었고, 예인속력의 증가에 따라 프로펠러 고착 저항이 저항의 주요한 부분을 차지하는 것을 확인하였다. 실제 실험을 통해서는 선박의 요잉에 의한 저항 증가분을 고려하는 것이 필요하다는 것을 알 수 있었다.

In this paper, calculation of towing force required to tow the ship and experiments to verify its appropriacy are discussed. Friction, wind and wave-making resistance of vessel are considered to calculate towing force of specified vessel. Propeller resistance is also reflected and it is assumed that the propellers are locked. Node analysis to estimate additional resistance on towline is applied. Total towing force could be obtained by adding the ship's resistance and towline resistance. Experiments with training ship SAE YU DAL was executed to check the effectiveness of calculation methods and some comparison between experiments and calculation results was also done. From the comparative analysis, we confirmed that towing speed is primary terms in the calculation of towing force and propeller resistance is a major elements of ship's resistance with the increasing of towing speed. We can see that additional resistance induced by yawing of ship during towing have to be considered for total tow resistance.

키워드

참고문헌

  1. Choi, H.J, Kim, E.C(2012), "Development of the ship resistance calculation program for prediction of towing forces for damaged ships", Journal of the Korean Society for Marine Environmental Engineering, Vol. 15, No. 2. pp. 150-155. https://doi.org/10.7846/JKOSMEE.2012.15.2.150
  2. KR, KST(2008), "A study on the safety management policy for large tug and barge", MOMAF, pp. 4-20.
  3. M.A. Vaz, M.H. Patel(1995), "Transient behavior of towed marine cables in two dimensions", Applied Ocean Research, 17, pp. 143-153. https://doi.org/10.1016/0141-1187(95)00012-7
  4. Nam.T.K, Jung, C.H, Jeong.J.S(2012), "A Study on the calculation of resistance of the ship to be towed and towline tension", Journal of Navigation and Port Research, Vol. 36, No. 8, pp. 607-612. https://doi.org/10.5394/KINPR.2012.36.8.607
  5. The Society of Naval Architects of Korea(2009), "Ship's resistance and propulsion", Jisung Publishing Co., pp. 16-86.
  6. U.S.Navy Towing Manual(2002), U.S.Naval Sea Systems Command, SL740-AA-MAN-010.

피인용 문헌

  1. Dynamics Identification and Robust Control Performance Evaluation of Towing Rope under Rope Length Variation vol.20, pp.2, 2016, https://doi.org/10.9726/kspse.2016.20.2.058
  2. Total resistance prediction of an intact and damaged tanker with flooded tanks in calm water vol.130, 2017, https://doi.org/10.1016/j.oceaneng.2016.11.034