• 대한조선학회논문집
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• 제41권5호
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• pp.48-54
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• 2004

The present study investigates the fire development characteristics on a Ro-Ro ferry vehicle using the modified FDS code considering droplet break-up. Numerical simulations are compared with model-scale tests for validation of field model. The predicted results such as smoke layer temperature and oxygen concentration are in good agreement with model-scale tests. Also, it is shown that water spray systems are very effective to control the fire development on a vehicle deck. These numerical simulations using a field model may be helpful in accomplishing the fire safety for marine vehicle.

• 반도체디스플레이기술학회지
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• 제18권3호
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• pp.47-51
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• 2019

The three different polymer compounds were manufactured with the three different fire retardant (silane coated magnesium dihydroxide) contents, 180, 200, 220 phr, for making cable sheath for ship industry. In the research, ethylene-vinylacetate, polyethylene as matrix polymers and ethylene-vinylacetate grafted maleic anhydride as coupling agent were selected for compounding with fire retardant, closslinking agent, plasticizer, and other additives. In the evaluation. ΔT, Mooney viscosity, and tensile strength increased with the content of fire retardant. But it was found that too much fire retardant damaged aging resistance and cold resistance of the polymer compound.

• 한국군사과학기술학회지
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• 제16권6호
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• pp.752-761
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• 2013

A new gun fire control system has been developed for the Korean next generation frigate class. The engineering requirement was far more tightened than the PKG-A class for the firing range availability and gun control function since 5 inch gun is adopted for the new ship. We mention about the principal technologies required to build a generic gun fire control system and proposed methods for the new gun fire control system. The new system has been designed based on the proposed methods in order to satisfy the requirement and functionality has been proved to be acceptable through the sea trial by Korean navy.

• 정보처리학회논문지B
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• 제9B권3호
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• pp.263-270
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• 2002

현재가지 개발된 화재진압통제 지능시스템들은 대부분 규칙기반 시스템이다. 실제로 화재를 탐지하는데 필요한 지식은 정형화된 규칙만으로 표현하기 어렵다. 또한 시스템의 성능 향상을 위해서 지속적인 규칙들의 수정 및 추가가 이루어져야 하며, 특히 예외적인 상황에서의 화재 발생 탐지시 문제점을 지니고 있다. 이러한 문제점들을 개선하기 위한 규칙 및 사례기반 추론을 이용한 하이브리드 화재진압통제 지능시스템 (H-FFIS)은 규칙기반 시스템보다 화재탐지율은 향상시켰으나, 수행시간이 증가되었다. 본 연구에서는 기존의 H-FFIS의 단점을 보완하기 위하여 규칙 및 클러스터링에 의한 사례기반 추론을 이용한 개선된 선박 화재진압통제 지능시스템(A-FFIS)을 제안한다. 제안하는 시스템은 기존의 H-FFIS와 비교해 볼 때, 수행시간을 감소시키면서 정확성을 향상시키는 결과를 얻었다.

• 선박안전
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• 통권38호
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• pp.12-21
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• 2015

유리강화섬유(FRP,Fiber Reinforced Plastic)은 가볍고 내구성등이 우수하여 가공하기 쉬워 선박건조, 특히 어선의 건조재료로 많이 활용되고 있으나, FRP의 재료인 매트와 로빙이 인화성을 가진 수지와 접합되어 화재에는 매우 취약한 특성을 가지는 특성을 가진다. 최근 10년간의 중앙해양안전심판원의 어선화재 재결서 분석결과 전체의 약80%에 해당하는 화재사고가 기관실에서 발생하였다. 이에 새로 출범한 해양수산부는 FRP선박의 구조기준을 개정하여 총톤수10톤 이상 선박의 기관실에 대한 방화조치를 그 이하선박까지로 적용 확대하였으며, 어선구조기준 역시 행정규칙 행정예고를 통해 강화하려는 움직임을 보이고 있다. 본 지에서는 국내외 화재사고 발생현황 및 관련 규제 내용을 비교 분석하여 제시하였으며 분석결과, 일반선박의 방화조치에 대한 규제는 거의 유사하였으나 어선관련 규제의 경우, 영국의 규제가 가장 강화되어 있었으며 관련 화재사고 발생현황도 국내 및 일본과 비교해 보았을때 같은 기간 발생한 일반선의 화재발생척수 대비 어선의 화재발생척수가 적은것을 확인할 수 있었다.

• 한국기계기술학회지
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• 제13권2호
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• pp.21-29
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• 2011

This paper examines the applicability of formal safety assessment to the passenger ships. This is followed by an analysis of passenger ship characteristics and a proposed formal safety assessment methodology. Five interlocking steps are described to construct a safety model including novel risk assessment, cost-benefit analysis and decision-making approaches. A case study is carried out in order to demonstrate the proposed methodology. Further development in formal safety assessment in the context of passenger ship safety is finally discussed in detail.

• 반도체디스플레이기술학회지
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• 제18권1호
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• pp.42-47
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• 2019

The four different polymer compounds were manufactured to make cable sheath for ship industry. Two kinds of ethylene-vinyl acetate (EVA) were selected as main matrix polymers for compounding with fire retardant, crosslinking agent, filler, plasticizer, and other additives. The properties of the four compounded materials were investigated with the contents of fire retardant, silane coated aluminum hydroxide (S-ATH). Rheology, Mooney viscosity, and tensile strength increased with S-ATH contents by reinforcing effect. With increasing fire retardant amount, fire resistance increased, but cold resistance didn't show an obvious enhancement due to polar effect of vinyl acetate in EVA.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1984년도 하계학술회의논문집
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• pp.71-73
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• 1984

• 한국해양공학회지
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• 제32권2호
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• pp.138-142
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• 2018

The marine industry is rapidly developing as a result of the increase in various needs in the marine environment. In addition, accidents involving ship fires and explosions and the resulting casualties are increasing. Generally, manpower and safety problems exist in fire fighting. A fire fighter in the form of an autonomous surface robot would be ideal for marine fire safety, because it has no manpower and safety problems. Therefore, an autonomous surface robot with the abilities of fire recognition and tracking, nozzle selection, position and attitude control, and fire fighting was developed and is discussed in this paper. The test and evaluation results of this robot showed the possibility of real-size applications and the need for additional studies.

• 한국해양공학회지
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• 제37권3호
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• pp.99-110
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• 2023

When a fire accident accompanied by an explosion occurs, the surrounding firewalls are affected by impact and thermal loads. Damaged firewalls due to accidental loads may not fully perform their essential function. Therefore, this paper proposes an advanced methodology for evaluating the fire resistance performance of firewalls damaged by explosions. The fragments were assumed to be scattered, and fire occurred as a vehicle exploded in a large compartment of a roll-on/roll-off (RO-RO) vessel. The impact velocity of the fragments was calculated based on the TNT equivalent mass corresponding to the explosion pressure. Damage and thermal-structural response analyses of the firewall were performed using Ansys LS-DYNA code. The fire resistance reduction was analyzed in terms of the temperature difference between fire-exposed and unexposed surfaces, temperature increase rate, and reference temperature arrival time. The degree of damage and the fire resistance performance of the firewalls varied significantly depending on impact loads. When naval ships and RO-RO vessels that carry various explosive substances are designed, it is reasonable to predict that the fire resistance performance will be degraded according to the explosion characteristics of the cargo.