• 해양환경안전학회지
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• 제20권2호
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• pp.186-192
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• 2014

본 연구에서는 대정해상풍력단지 설치 해역과 인근수역을 이용하는 선박교통량과 해상교통흐름의 패턴을 분석하고 단지 조성 후 합리적인 대체통항로 지정에 따른 교통량을 예측하였다. 또한 예측된 교통량을 근거하여 통항로별 통항안전성을 평가하고 검토함으로써 선박의 안전운항에 필요한 제반조건 및 대책을 제시하였다. 풍력단지 설치 해역과 인근수역의 해상교통흐름 패턴을 분석한 결과 총 8가지의 교통흐름으로 분류되었고, 연간 교통량은 8,975 척으로 예측되었다. 이를 근거로 단지 조성 후 4가지의 대체 통항로 지정에 따른 교통량을 예측하였다. 예측된 교통량과 SSPA의 동력선충돌모델을 이용하여 통항안전성을 평가한 결과 충돌 및 침로이탈확률에 관한 국내 안전기준 $10^{-4}$ 이하를 만족하므로 계획된 대체통항로가 유용함을 확인하였다.

• Ocean and Polar Research
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• 제37권3호
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• pp.235-247
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• 2015

The main purpose of procuring the oceanographic research vessel with state-of-the-art technology is to provide a floating laboratory to conduct field work on the global oceans. The vessel should be properly utilized to locate and evaluate unexplored natural resources as well as to contribute international efforts to better understand and manage global environmental issues. Top priorities in the vessel design are high safety standards, noise and vibration control efficiency, and effective application of research equipment. For the accomplishment of all activities, the vessel length over all should be extended ~100 m with a gross tonnage of ~5,900 ton. In particular, the dynamic positioning system II will essentially operate at sea state 6. The high efficiency emissions reduction system will also be adopted in preparation for entry into force of 3rd exhaust emission control (Tier III). About 130 navigational and scientific instruments will be installed. The final design and model test of the new research vessel were reviewed and completed, respectively, in 2014. Currently, the ship is being built on schedule and expected to be delivered in December 2015. Within the near future, the new vessel will assume the role of carrying out multidisciplinary oceanographic researches of the highest standards in a technologically advanced and environment friendly manner.

• 한국군사과학기술학회지
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• 제14권3호
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• pp.524-531
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• 2011

The cryogenic vessel, storing a liquified solutions as LOX and $LN_2$, consists of a external vessel, internal vessel, thermal insulator and internal support. The internal support should be satisfied with mechanical strength not only to support weight of internal tank but also to maintain uniform space between external and internal tank in spite of external mechanical shock. However, excessive structure design of internal supports is able to increase the amount of heat conduction and the rate of vaporization. The thermal insulator, filled with space between a external and internal vessel, reduces the rate of heat transfer and guarantees the standing time of cryogenic vessel. Especially powder type of insulator has low thermal conductivity and reduce the specification of structure design. In order to evaluate the effect of insulator on structure design, the experiment set-up simulated cryogenic vessel was tested in shock environment according to thermal insulator. As a result, the behavior of internal support under external shock was understood and the design criteria was able to be suggested.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2017년도 추계학술발표회
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• pp.216-216
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• 2017

• 수산해양기술연구
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• 제39권4호
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• pp.291-297
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• 2003

Al-brass is usually used as the tube material of vessel's heat exchanger for seawater cooling system because it has high thermal conductivity and good mechanical properties and high corrosion resistance due to cuprous oxide (Cu20) layer against seawater. However, Al-brass tubes of heat exchanger for vessel at the actual environment is reported that local corrosion such as stress corrosion cracking occurred by synergism effect between mechanical factor and corrosion environment In this paper, the effect of corrosion environment on the stress corrosion cracking of Al-brass in various NH4OH of 3.5% NaCl solution, under flow by constant displacement tester. Based on the test results, the behavior of polarization, stress corrosion crack propagation and dezincification phenomenon of Al-brass are investigated. The main results are as follows：(1) Increasing range of potential from open circuit potential to repassivation gets lower, as the contain rate of NH4OH gets higher. (2) As contain rate of NH4OH gets higher, SCC of Al-brass is become activation but the protection film(Cu20) of Al-brass is created in 3.5% NaCl solution. (3) According as content of NH4OH increases in 3.5% NaCl solution, the dezincifiction area is spread. It is concluded that dezincification occurred by localized preferential anodic dissolution at stress focusing region.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2003년도 춘계학술발표회
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• pp.99-104
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• 2003

Vessel collision accidents have been investigated by means of questioning the persons involved and plotting manually the stated situation. But the repetitive plotting by hand can cause the investigator to make some errors, and it can be connected to a wrong judgement. In this paper, we proposed a simulator for reconstructing and analyzing vessel collision accidents at sea, where the given situation is plotted automatically on it. We verified validity of the system by applying it to some collision accidents.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2017년도 추계학술발표회
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• pp.150-150
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• 2017

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2017년도 추계학술발표회
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• pp.185-185
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• 2017

• 해양환경안전학회지
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• 제27권7호
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• pp.1129-1136
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• 2021

본 논문은 선박 기관실 내의 효율적인 감시를 위한 팬-틸트-줌(PTZ) 카메라 기반의 모니터링 시스템의 설계 방법을 다룬다. 선박 기관실에는 여전히 전통적인 아날로그 계기들을 사용하는 곳이 많고, 침수나 화재 등 안전과 밀접하게 관련된 사각지대들이 다수 존재한다. 이러한 감시 개소들에 대하여 비교적 빠른 주기로 넓은 범위를 보장하는 카메라 기반 감시 시스템은 선박의 안전을 강화시킬 수 있는 효과적인 대안이 될 수 있다. 이에 본 연구에서는 기존 PTZ 카메라의 기능들을 소프트웨어적 방법으로 더욱 강화시킨 형태의 모니터링 시스템을 제안한다. 보다 구체적으로는 카메라제어 모듈, 위치등록 모듈, 순회제어 모듈, 멀티뷰 영상재구성 모듈로 구성된 모니터링 시스템의 설계 방법을 제안하고, 제안된 방법은 기관실 환경에서의 실험을 통해 그 효용성을 평가한다.

• 한국소음진동공학회논문집
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• 제21권7호
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• pp.650-656
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• 2011

The noise inside a naval vessel is very important in considering the need for hearing protection, improving the working environment and maintaining good communications for crews living on board a naval vessel. The indoor noise of a ship usually is specified by the A-weighted sound pressure level, but other evaluating parameters are required to reflect human senses more effectively. This paper uses additional noise indices related to room acoustics, such as NR(noise rating), NC(noise criterion), RC(room criterion), PSIL(preferred speech interference level) and loudness level to evaluate the noise inside cabins on a naval vessel. Using these psychological noise indices, allowable limit of noise level in cabins is suggested through psycho-acoustic evaluation for the noise in cabins.