• International Journal of Naval Architecture and Ocean Engineering
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• 제13권1호
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• pp.246-259
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• 2021

IMO stability regulations include various stability parameters such as GM values. To assess the stability of the ships, we should check all stability parameters of the IMO requirements. However, since this process is complex, a more convenient way to evaluate stability performance is required. In this research, the index for marine ship intact stability assessment (IMSISA) model was developed to solve these problems. The IMSISA model consists of a stability index calculation module and a stability assessment module. In the stability index calculation module, ten stability parameters, including GM, were used to develop the stability index, which has the advantage of being able to quantify the ship stability. The stability assessment module uses the stability index value to determine the stability status of the ship and provides the captain with stability management guidelines. To verify the proposed model, the basic stability calculations were performed for two model ships in 32 loading situations. The proposed model was found to provide better performance in the stability assessment than the previous study. By applying the IMSISA model to the ships, the captain can assess the ship stability more quantitatively and efficiently.

• 대한조선학회논문집
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• 제36권2호
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• pp.121-134
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• 1999

본 논문에서는 유체 정역학적 계산, 용적 계산, 비손상 및 손상시 복원성 그리고, 선형 변환을 수행할 수 있는 객체 지향적 선박계산 전산프로그램을 개발하였다. 선박 계산을 위한 선형과 구획 형상을 NURBS(Non-Uniform Rational B-Spline) curve wire-frame model로 표현하고, 선형과 구획 단면 형상을 직접 3차원 평면과의 교차 계산을 통해 유체 정역학적 계산과 용적 계산을 수행하였다. 선박의 3차원 정역학적 평형 상태 방정식을 정식화하고, 순차적으로 선형화하여 힘과 모멘트 평형상태의 자세를 구하였다. 상용 선박 계산 프로그램의 결과와 비교하여, 개발 프로그램을 쉽고, 편리하게 사용할 수 있고, 계산의 정확도가 높음을 확인할 수 있었다.

• 한국항해학회지
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• 제13권2호
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• pp.57-73
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• 1989

This paper presents a practical method to predict the characteristics of ship manoeuvring motions. A attempt is made to calculate the manoeuvring motions utilizing principal particulars of ship hull, properller and rudder as basic input data. The mathematical models, which describe the ship manoeuvring motions, are developed on the basis of MMG(5), Inoue(17), Hooft(18) and so on. Calcuations of manoeuvring motions for three kinds of typical characteristics, namely turning motion, zig-zag manoeuvre response and steady turning performance, are carried out. In order to examine the validity of the calculation method of this paper, simulations are run for seven merchant ships employed by Inoue(4). The computed results by present method are compared with full scale trials and Inoue's calculations(4). It can be concluded that the calculation method proposed in this paper is useful and pwoerful for prediction of characteristics of ship manoeuvring motions at the initial design phase or the application study on manoeuvring motions.

• 대한조선학회지
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• 제20권3호
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• pp.25-32
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• 1983

Korea Institute of Machinery and Metals(KIMM) purchased a computer program for preliminary ship design from the ship Research Institute of Norway(NSFI). The program PROCAL(PROject CALculation) is described with other programs developed by NSFI such as SHIPMODEL, FLEET, SHIPSHAPE, SKRIN.

• 대한조선학회논문집
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• 제46권4호
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• pp.424-434
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• 2009

Recently, compartment design of a naval ship for efficiently utilizing the limited spaces has become more important. However, the compartment design of the naval ship was not optimized like that of a commercial ship because of a number of design requirements. Thus, the task is being manually performed using the data of parent ships and designers' experiences. To improve this procedure, an optimal compartment design system, which can generate better compartment design result with the satisfaction of various design requirements, is developed in this study. Finally, to evaluate of the applicability of the developed system, it is applied to the compartment design of a 9,000ton missile destroyer(DDG). The result shows that the developed system can yield better result than original design.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2000년도 제 25회 정기총회 및 추계학술발표회
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• pp.151-158
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• 2000

1. Instruction. 2. Investigation about holding power in Da san mooring area. 3. Weather condition in Da san anchorge. 4. Calculation of Externer power. a. Calculation of Container ship' holding power in mooring. 6. Comparison of Container ship' External power and holding power. 7. Conclusion.

• 선박안전
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• 통권31호
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• pp.60-70
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• 2011

The slamming impact pressures at the bottom area of the Open60' are evaluated by the rules and regulations of various organizations - ISO and classification societies. The enhanced performance of the modern racing yacht in terms of speed which achieves well over 20 knots needs special consideration. The calculated design impact pressures are compared a experimental results. Severe difference can be found in these calculation results but the final conclusion shall be obtained after the scantling calculation under the evaluated design impact pressure so far.

• 대한조선학회지
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• 제15권1호
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• pp.7-9
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• 1978

In this calculation of statical stability of a ship, mechanical integrator was used most popularly and the direct calculation method such as a Barn's wedge method was also adopted in some cases. Both of the above method was developed for manual calculation which include mechanical integration or drafting procedure on body plan. Therefore, the computerization of stability calculation by the above method is very difficult. In this paper a simplified method for stability calculation is suggested, with based on hydrostatic data and immerged wedged characteristics.

• 한국CDE학회논문집
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• 제16권3호
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• pp.227-235
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• 2011

Ship handling simulator should have capabilities of calculating ship motions (heave, pitch, and roll) at given sea state and displaying the calculated motions through a real-time 3D visualization system. Motion solver of a ship handling simulator generally calculates those motions in addition to position for an own ship, a main simulation target, but provides only position information for traffic ships. Therefore, it is required to simulate real-time traffic ship and buoy motions coupled with ocean waves in a ship handling simulator for the realistic visualization. In the paper, the authors propose a simple dynamics model by which ship and buoy motions are calculated with the input data of wave height and discuss a method for the implementation of a ship and buoy motions calculation module.

• 해양환경안전학회지
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• 제20권4호
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• pp.412-418
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• 2014

본 연구에서는 선박의 우수한 운항 성능과 쾌적한 승선감의 확보를 위해, 부경대학교 실습선인 가야호를 대상으로 해상상태, 선수각 조건, 선속, 그리고 선내 위치별로 수행된 뱃멀미 발현에 관한 5차에 걸친 설문조사 결과와 선체운동해석법(Strip Method)에 기초한 수치계산을 통해서 얻은 계산결과를 비교, 분석하였다. 이를 통해 많은 수의 학생이 승선하는 실습선의 거주구역 배치에 대한 타당성 검증과 함께 항해 중 멀미도를 낮출 수 있는 침로와 선속의 결정에 도움이 될 것이다. 본 연구에 의하면 해상상태가 거칠수록 전체 멀미비율이 높게 나타났으며, 선내 위치별로는 선체의 중량중심에서 멀리 떨어져 있는 선교와 거주구역에서 수직가속도의 가중치가 높았고 멀미비율도 높게 나타났다. 그리고 선수파에 비해 횡요시 수직가속도의 가중치가 높게 나타났다. 멀미도 조사와 MSI 계산의 비교에서는 운동 수직가속도가 증가하면, 상대적으로 멀미도도 증가하고, 수직가속도가 증가하는 구역과 멀미도 발생구역이 일치하였다.