• Journal of the Korean Society for Marine Environment & Energy
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• v.14 no.4
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• pp.264-272
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• 2011

Shipbuilders carry out the operation test to check the conditions of the main propulsion system and auxiliaries for moored vessel in the quoy before the sea trial. The estimation of the thrust and torque for the partially submerged propeller should be prepared to ensure the safety of mooring line and the ship. In this paper, the variations of the thrust and torque according to the shaft submergence and the propeller rotating speed in bollard pull condition are investigated with the model test and the numerical analysis. Based on these resaearch, the empirical formula representing the physical phenomena of the partially submerged propeller is derived and validated through comparison to measurement results of full-scale propellers under the quoy operation test.

• Journal of Navigation and Port Research
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• v.37 no.2
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• pp.149-154
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• 2013

This paper considers the issue of LSS(Liquid Spill Stopper)'s performance verification testing against external resisting force. The importance of the test is to ascertain the possibility of liquid spill stop quickly and efficiently by LSS. The method adopted in this research is the experimental device for puncture's inflow pressure and test the adhesive (magnetic) force on shell plates during the sailing. The major results of the paper are the followings : (a) The performance of LSS against 40 and 100mm diameter puncture was confirmed under 1.0bar. (b) LSS near bow detached first at 20.2 knots. This indicates that LSS can recover the damaged movability needed to naval warships' operation as well as merchant ships.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.10a
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• pp.50-51
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• 2009

This paper aims to improve survival ratio at ship fires by soot density reduction This study examines soot density and visibility using FDS. And also examines evacuation time by Pathfinder. The FDS(Fire Dynamic Simulator) is a 3 zone model(Field Model) analysis tool and the patherfinder is a useful analysis tool for evacuation. This research examined about evacuation time using the current regulations of the ship's corridor width and exit width first And then studied evacuation time again when ship's structure was changed according to the method that is proposed in this paper. And finally compared the results each other.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.170-172
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• 2019

최근 우리나라에서는 해양사고의 효과적인 예방을 위하여 구축 중인 한국형 e-Navigation SV20-선내시스템 원격모니터링 서비스에서는 복원성, 화재, 침수, 과도경사, 항해장비의 이상과 같이 선박의 안전 운항과 직접적으로 관련이 있는 선박의 센서들을 수집, 분석하여 이상 상태와 긴급상황을 자동으로 식별하여 안전운항을 지원하는 기능이 있다. IMO 선박안전관리 시스템의 경우 선원의 인적 과실에 의한 해상에서 안전 및 해양환경 보호를 위한 핵심 요소로서 우리나라는 SOLAS 협약 제9장(선박의 안전운항을 위한 관리)및 ISM CODE를 1999년 2월 해사안전법에 수용하여 2002. 7. 1.부터 단계적으로 시행하고 있다. 이 연구에서는 이 둘의 융합 개념의 기술적 결합을 통한 체계적이고 자동화적으로 선박에서의 안전관리 능력을 제고하여 안전 사고 발생을 최소화 할 수 있는 여러 가지 시스템과 더불어 사고 발생시 효율적으로 대응할 수 있는 표준 토폴로지 기반 UI 및 항차 기반 위기대응 가이던스를 개발 하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.05a
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• pp.63-65
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• 2019

부산항 신항 서컨테이너터미널은 선박 대형화와 완전 무인 자동화부두 구축이라는 설계컨셉에 따라 접안 가능한 최대선박은 3만 TEU 선박으로 결정하고 그에 따라 제반 시설들의 규격을 증대하였으며, 상부 자동화 설비들의 운영에 지장이 발생하지 않도록 대형 유수실, 월파차단벽 등의 침수 방지시설과 크레인 및 AGV구간 부등침하 방지를 위해 41.5m의 광폭케이슨과 176m의 광폭 DCM기초를 적용하고, 최신 설계기준에 의거한 내진 I 등급 구조물로 계획하는 등 안전하고 이용성이 뛰어난 컨테이너 터미널이 구축되도록 하였다.

• Journal of Navigation and Port Research
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• v.26 no.1
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• pp.1-7
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• 2002

A coastwise chemical tanker sailing at full speed has capsized in calm water and while turing. We investigate reasons of the accident and demonstrate that a proper correction for the free surface effect of the liquid cargo has not been practiced in the initial design stage and that the bow-sinkage induced in sailing has weakened the form stability of the ship. It is also shown that the liquid cargo shift occurring in turning generated a significant outward heel moment.

• Journal of Navigation and Port Research
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• v.44 no.3
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• pp.264-274
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• 2020

The Ro-Ro ferry ship capsized and sank to the bottom of the sea because of the rapid turning for several reasons, such as lack of stability due to the center of gravity rise from the extension and rebuilding of the stern cabin, excessive cargo loading, and shortage ballast, poor lashing, etc. The purpose of this study was to investigate and analyze the cause of the ship's rapid flooding, capsizing, and sinking accident according to rapid turning scientifically and accurately using the Fluid-Structure Interaction( FSI) analysis technique. Several tests were conducted for this cause investigation of the flooding and sinking accident correctly and objectively, such as the realization of the accurate ship posture tracks according to the accident time using several accident movies and photos, the validation of cargo moving track, and sea water inflow amount through the exterior openings and interior paths compared with the ship's posture according to the accident time using the floating simulation and hydrostatic characteristics program calculation, and the performance of a full-scale ship flooding·sinking simulation.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1995.10a
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• pp.141-145
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• 1995

하구언과 방조제의 축조와 시기를 같이 하여 목포내항 부근의 만조시 수위가 크게 상승하여 목포시 저지대 곳곳에 침수문제를 야기시키고 있으며, 저조위는 하구언 건설 이전보다 낮아져 연안해운이 발달된 목포항에서 선박의 항해에 지장을 받는 등 이중의 고통을 받고 있는 실정이다. 이와 더불어 목포구의 조류속이 건설전에 비해 급격히 감소됨에 따라 외해수와 내해수의 해수교환이 여의치 않게 되었으며, 최근 크게 문제시되고 있는 영산호의 수질과 목포시의 폐수발생량을 감안하면 장차 목포항 인근의 해수오염이 크게 우려되는 실정이다. (중략)

• Journal of Navigation and Port Research
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• v.34 no.6
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• pp.423-427
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• 2010

Land fire receives additional extinguishing methods easily by professional extinguisher. But because of isolation and independence from land when sailing on the sea, ships are difficult to get special help from land. Generally, the death ratio by suffocation is higher than the death rate by flame and to reduce suffocation death ratio, fast evacuation is required. This paper aims to improve survival ratio at ship fires by soot density reduction. This study examines soot density and visibility using FDS. And also examines evacuation time by Pathfinder. The FDS(Fire Dynamic Simulator) is a 3 zone model(Field Model) analysis tool and the patherfinder is a useful analysis tool for evacuation. This research examined about evacuation time using the current regulations of the ship's corridor width and exit width first. And then studied evacuation time again when ship's structure was changed according to the method that is proposed in this paper. And finally compared the results each other.

• Journal of the Korean Society of Marine Environment & Safety
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• v.21 no.6
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• pp.784-789
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• 2015

It was carried out a review of operating limit analysis for small high-speed boat by author. In general, a review of ship's seakeeping performance is performed in the step of ship design, but this study was carried out in the state of completion of boat. Motion performance of Pitch, Vertical and Lateral acceleration and Slamming were satisfied in some encounter angle but deck wetness was not satisfied in all it does the analysis. As a result, sea state rather than the speed and encounter angle of vessel have a greater effect on the seakeeping performance of target vessel. It seems to be due to the size of the target ship.