• Proceedings of KOSOMES biannual meeting
• /
• 2008.05a
• /
• pp.43-47
• /
• 2008

In order to investigate the hydrodynamic interaction between the tug-barge and bank or ship which is crossing to the opposite direction, we have executed the towing simulation of tug-barge transportation. Heading of barge, yaw moment and lateral force of tug boat are obtained by this simulation. We have analyzed the characteristics of results and propose the safety towing method for tug-barge operation.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2019.11a
• /
• pp.51-53
• /
• 2019

연안 해역을 운항하는 예부선의 위험요소 중 예인선과 부선을 연결하는 예인줄을 타 선박이 인식하지 못하여 발생하는 해양사고를 분석하고 사물인터넷(IoT) 활용을 통한 예부선의 예인줄 시인성 강화로 해양사고 예방을 모색.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2010.04a
• /
• pp.345-346
• /
• 2010

본 연구에서는 모형실험 및 수치계산에 의해 정수중 부선 주위의 유통해석을 실시하였으며, 이를 통하여 객관적이고 정량적으로 부선의 저항추진 성능을 파악할 수 있었다. 먼저 희류수조에서 모형실험을 실시한 후, 실험에서 얻어진 데이터와의 비교를 통한 CFD의 유효성을 검증하고, 다른 형태의 예부선 선박 주위의 유동장 계산에 적용시켜 해결할 수 있는 가능성을 확인 하였다. 부선의 선수 형상에 의하여 저속일 때 25% 정도의 저항이 차이나는 현상을 모형실험을 통하여 파악할 수 있었으며, 유효마력은 7kts부터 급격히 증가하므로 적재상태별 경제적인 운항속력을 선정하여 효율적인 예부선 업무를 수행해야 할 것으로 판단된다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2010.10a
• /
• pp.128-130
• /
• 2010

예선과 부선으로 이루어진 예부선의 예인 운항 상태에 대한 수학모델을 개발하기 위하여, 먼저 예선에 대한 수학모델을 개발하였다. 이를 위하여 예선모형을 이용하여 4자유도의 수학모델에 대한 구속모형시험을 수행하였고, 그 결과를 이용하여 선회, 지그재그 시뮬레이션을 수행하였다. 또한 예선실선에 대한 예선시운전 실험을 통하여 선회, 지그재그 결과를 얻고, 이를 시뮬레이션 결과와 비교하여 예선의 수학모델을 검증하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2009.10a
• /
• pp.40-41
• /
• 2009

In general, ships are towed to keep the safe operations in harbor or channel by tug boats. Due to increase in ocean traffic, many accidents are happened in harbor or channel in these days. Therefore it is necessary to predict manoeuvrability of tug-barge system, and to assure the safety of that system. Turg-barge system is composed of tug boat, barge, and towing cable, connecting both ships. Manoeuvring equations of tug-barge system are suggested, and the scopes of model tests are discussed to establish the mathematical models for tug boats in this paper.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2009.10a
• /
• pp.38-39
• /
• 2009

Visual simulation technology is one of important constituents experienced directly by simulator users. Simulator users have a needs for more fast, realistic and intuitive visualization. Though hardwares such as computing power and visual equipment have been grown, the limits have been indicated in graphic rendering engine generally used in marine simulator up to now. This paper has focused on the review of applicability about graphic rendering engines for visual simulation. We had derived system requirements in visualization of tug-barge simulation, had surveyed graphic rendering engines as commercial and open source, and analyzed strengths and weakness of them.

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.15 no.1
• /
• pp.57-62
• /
• 2009

In order to investigate the hydrodynamic interaction between the tug-barge and bank or ship which is crossing to the opposite direction, the towing simulations of tug-barge transportation were performed. Heading of barge, yaw moment and lateral force of tug boat were obtained by this simulation. The characteristics of results were analyzed and the safety towing method for tug-barge operation was proposed. In order to reduce the slewing motion of barge for safe towing operation, the speed of tug boat should be kept slow ahead state with shortened towing line as length of barge within the limits of the possible.

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.14 no.4
• /
• pp.303-307
• /
• 2008

The tug boat is restricted in her maneuvering ability due to the towed barge, and tug-barge has been strongly affected by the external forces, i.e. the wind, wave, currents, and so on. Therefore, it is difficult to get the safety of tug-barge operation. It is necessary for the captain of tug boat, VTS and operation department to develope the system which can keep observing the course, speed and position of the towed barge in actual sea and prevent the marine accidents in advance. In this study, we proposed the basic method to develope the safety towing system for barge using portable GPS which was easily movable and relatively inexpensive. Then we conducted the test on the real barge. As a result, we could obtain diverse navigation data to make a safety towing work. It was noted that these data could be used for carious purposes.

• Proceedings of KOSOMES biannual meeting
• /
• 2008.05a
• /
• pp.55-59
• /
• 2008

The tug boat is restricted in her maneuvering ability due to the towed barge, and tug-barge have been strongly affected by the external forces, i.e. the wind, wave, currents, and so on. Therefore it is difficult to get the safety if tug-barge operation. In this study, we propose the basic method to develope the safety towing system for barge using portable GPS which is easily movable and relatively inexpensive. Then we have conducted the test on the real barge and discuss the results.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2011.11a
• /
• pp.46-48
• /
• 2011

선원들은 '배'라는 한정된 생활공간에서 공동생활을 하면서 선원만의 특수한 생활형태를 형성하고 있다. 즉 선원근로자들은 선상작업을 통하여 통일적이고 협동적인 과업수행을 요구 받으며, 바다라는 고립적 환경에서 장기간 단조로운 집단생활로 인하여 상당한 스트레스에 노출되어 있을 것으로 예상된다. 또한 선내의 환경은 운항에 따른 높은 수준의 소음과 선체의 동요, 한랭과 폭염, 습도 등에 노출되어 있으며, 장시간 격리된 채 바다에서 생활함으로써 가족, 친구 등과의 교류의 기회가 제약됨으로써 이러한 요인들 또한 스트레스로 작용할 가능성이 높은 직업군이다. 본 연구에서는 선상환경에서 선원들의 스트레스 요인과 그 대처방안을 모색하고자 그 기초조사로써 예부선 선원근로자의 직무스트레스와 직무만족도 조사를 실시하였다.