설계단계에서의 트롤어선 조종성능 추정 정확성 향상에 대한 연구 = A study on the improvement of the accuracy of fishing trawlers maneuverability estimation at the design stage

다국어 초록 (Multilingual Abstract)

At ship design stage, the maneuverability is generally estimated based on the empirical formula or the computational fluid dynamic (CFD), which is one of the numerical simulation methods. Using the hydrodynamic derivatives derived through these methods can quantitatively estimate the maneuverability of target vessels and evaluate indirect maneuverability.
Nevertheless, research on estimating maneuverability is insufficient for ships not subject to IMO maneuverability standard, especially fishing vessels, and even at the design stage, the empirical formula developed for merchant ships is applied without modification. An estimation error may occur due to the empirical formula derived from the regression analysis results of a model test if the empirical formula developed for merchant ships with different hull shapes is applied to fishing vessels without any modification. In this study, the modified empirical formula that can more accurately estimate the fishing vessel's maneuverability was derived by including the hull shape parameter of target fishing trawlers in the regression analysis process that derives Kijima et al. (1990) formula. As a result, the modified empirical formula showed an average estimation error of 6%, and the result improved the average error of 49% of Kijima et al. (1990) formula developed for merchant ships.

국문 초록 (Abstract)

조선소 설계 실무에서는 주로 수치시뮬레이션을 이용한 경험식과 전산유체역학(CFD)를 통하여 선박의 조종성능을 추정하고 있으며, 이는 선박의 조종성능에 대한 간접적인 평가 또한 가능하게 한다. 그러나 이러한 연구는 대부분 IMO 조종성 기준이 적용되는 100m 이상의 상선을 대상으로 이루어지고 있으며, 100m 미만의 선박, 특히 어선에 대한 연구는 다소 부족한 실정이다. 그러한 이유에서 상선모델의 모형시험 결과를 회귀분석하여 개발된 경험식을 선형이 다른 어선에 적용하면 추정오차를 발생시킨다. 이 연구에서는 어선선형이 가지는 특성 계수를 상선을 대상으로 개발된 경험식에 포함시켜 보정 경험식을 도출하였으며, 대상어선의 실험시험과 비교하여 검증하였다.

참고문헌 (Reference)

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4 Kijima K., "Outline of Research on ship Manoeuvrability" 1-5, 1995

5 Kijima K, "On the manoeuvring performance of a ship with the parameter of loading condition" 168 : 141-148, 1990

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