• Structural Engineering and Mechanics
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• 제60권5호
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• pp.851-873
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• 2016

Helidecks are vital structures that act as a last exit in an emergency. They transport people and goods to and from ships and offshore plants. When designing the structure of a helideck, it is necessary to comply with loading conditions and design parameters specified in existing professional design standards and regulations. In the present study, finite element analysis (FEA) was conducted with regard to a steel helideck mounted on the upper deck of a ship considering the emergency landing of the helicopter. The superstructure and substructure were designed, and the influence of various design parameters was analyzed on the basis of the FEA results.

• 한국전산구조공학회논문집
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• 제32권3호
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• pp.191-197
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• 2019

조선 및 해양플랜트 산업은 복합 및 대형화됨에 따라 유지보수 및 검사 시스템이 중요해지고 있다. 최근 작업자의 작업이해도 향상과 효율을 높이기 위해 증강현실기반 유지보수 및 검사 시스템이 많이 주목받고 있는데, 증강되는 모델과 현실정보 간의 정확한 정합이 이루어지지 않아 작업에 오히려 혼동을 초래하는 일이 자주 발생한다. 이를 위하여 실모델에 특정 이미지를 부착하는 마커 기반 증강현실 기술이 사용되었으나, 조선 및 해양플랜트 산업 특성상 마커의 훼손 가능성이 있으며, 카메라가 명확히 마커 전체를 검출할 수 있어야 하기 때문에 작업자와 마커 간의 충분한 공간을 필요로 한다. 본 연구에서는 이러한 기존 증강현실 시스템의 한계점을 극복하기 위하여 마커리스 기반 증강현실을 활용하여 조선 및 해양플랜트 산업에서 가장 많은 공정을 차지하고 있는 파이프 시스템을 대상으로 정확하게 실 모델을 인식하고 해당 모델에 가상 CAD모델을 정합하는 방법론에 대해 연구하였다. 본 시스템을 통해 현실 작업자의 자세와 제한적인 환경에 따른 증강모델의 비틀림 현상을 개선하고 작업 이해에 혼동을 주는 현상을 없앨 수 있을 것으로 기대된다.

• 한국안전학회지
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• 제30권5호
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• pp.80-85
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• 2015

In recent years, Korea's shipbuilding industry have expanded its business into offshore plant. These changes are increasing the interest on job stress in shipbuilding industry. The purpose of this study is to investigate the differences of job stressors between white and blue-collar workers. The survey was using Korean Occupational Stress Scale(KOSS) questionnaire and was administered to 8,080 workers of large shipyard company. As a result of the survey, compared with the median score of Korean workers, job stress level of shipyard company workers was low. However, seven categories of KOSS, except for job demand showed higher stress levels of blue-collar workers than white-collar workers. The overall stress level of shipyard company workers is low, however, it is important to find stressors by considering the type of work, working period etc., through a detailed analysis of KOSS 8-categories. The results of this study may be helpful to identify the level of stress and to establish preventive measures in Shipyard Company.

• 한국산업융합학회 논문집
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• 제26권6_3호
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• pp.1305-1314
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• 2023

The global ship repair and modification market is expected to grow up to approximately $ 30 billion by 2025. Korea's shipbuilding industry is leading the world grounded on its international competitiveness in design and production technology. The reality, however, is that the ship repair and modification industry is centered on Gyeongnam, and there are only two to three ship repair workplaces that can repair large ships. Therefore, domestic ship repair companies target small and medium-sized ships mainly. This is because there are few workplaces equipped with a large dock in which large ships like LNG ships can be inspected regularly or repaired, complaints are severe for environmental problems, and related environmental regulations are so strict that it is very hard to obtain government approval for the extension of ship repair and modification workplaces or the opening of new shipbuilding sites. Besides, on account of the workers' high wages, few experts related, and higher ship repair price compared to that of Southeast Asia, most of the volume of repairing large ships including domestic LNG ships is being lost to Southeast Asian or Chinese markets. In this study, the work process and pre-work preparation process for ship hull (winch, windlass, hatch cover, ramp door, cargo gear, anchor chain) repair were analyzed and presented to foster domestic ship repair experts and revitalize related industries.

• 대한조선학회 특별논문집
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• 대한조선학회 2009년도 특별논문집
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• pp.71-79
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• 2009

The world-wide ship construction market is forecast that the considerable portion of shipbuilding and oceanic plant industry will be transferred consequently in China after 5 or 10 years. This point of view where the Korean ship construction industry seizes the initiative from the world-wide ship construction/oceanic field, we must cultivate technical power of base technology, and focus our interests on the development of core parts. In this study, our proprietary remotely operated valve actuator system with power line technology was developed to enhance the installation and commissioning process by our own technology. This paper describes the new design and functions of the remotely operated valve system for shipbuilding and offshore market especially for FPSO.

• Journal of Ship and Ocean Technology
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• 제8권3호
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• pp.26-39
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• 2004

A vessel/mooring/riser coupled dynamic analysis program in time domain is developed for the global motion simulation of a turret-moored, tanker based FPSO designed for 6000-ft water depth. The vessel global motions and mooring tension are simulated for the non-parallel wind-wave-current 100-year hurricane condition in the Gulf of Mexico. The wind and current forces and moments are estimated from the OCIMF empirical data base for the given loading condition. The numerical results are compared with the OTRC(Offshore Technology Research Center: Model Basin for Offshore Platforms in Texas A&M University) 1:60 model-testing results with truncated mooring system. The system's stiffness and line tension as well as natural periods and damping obtained from the OTRC measurement are checked through numerically simulated static-offset and free-decay tests. The global vessel motion simulations in the hurricane condition were conducted by varying lateral and longitudinal hull drag coefficients, different mooring and riser set up, and wind-exposed areas to better understand the sensitivity of the FPSO responses against empirical parameters. It is particularly stressed that the dynamic mooring tension can be greatly underestimated when truncated mooring system is used.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 춘계학술대회
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• pp.589-591
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• 2021

해양플랜트 산업 및 선박 건조현장에서는 다양한 업무 형태로 인해 고소작업용 Access Service Basket을 사용 중에 있다. 하지만 이런 시스템을 운용함에 있어서 다양한 형태의 안전사고가 지속적으로 일어나고 있다. 현재 사용되고 있는 고소용 작업대의 경우에는 적재용량, 근접거리, 운용 방향 등을 작업자가 판단하여 운용함에 다양한 위험에 노출되어 있는 형태이다. 본 논문에서는 이 문제를 해결하기 위하여 고소작업용 시스템에 IoT 기반의 모니터링 및 충돌 경보 시스템을 접목한 장치를 개발하였다. 개발한 장치로 하여금 작업자 및 관리자가 쉽게 운용상태를 확인할 수 있고 그에 따라서 안전사고를 미리 예방하는 장치를 전문가 입회하에 테스트하여 그 신뢰성을 확보하였다.

• 한국인터넷방송통신학회논문지
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• 제21권2호
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• pp.157-167
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• 2021

정보기술의 중요성에도 불구하고 정보화 성과 관리 연구와 성과 관리 방법은 매우 미흡하다. 본 논문에서는 협업과 공정상의 복잡도가 높은 조선해양산업의 특성을 반영한 전사적 정보화 성과 평가 및 관리 모형인 SSU-ITPM 모형을 제시하였다. 본 모형은 정보화 기획 및 사업관리, 정보화 현업 활용 평가, 정보화 활용 품질 평가, 정보화 사용자 만족도 평가, 정보화 효과 달성 평가로 구성하였다. 또한 D사 적용 사례를 통해 해당 모형의 실무적 활용 타당성을 확인하였다. 본 연구는 조선해양 분야와 같은 ETO 플랜트 기반 기업의 정보화 성과관리에 실무적 참조 모형을 제공할 것으로 사료된다.

• Archives of Metallurgy and Materials
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• 제65권4호
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• pp.1245-1248
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• 2020

Section steels produced by welding are essential parts for shipbuilding and offshore plant production. T-type and H-type section steels are produced by handwork for secondary processing, which is a generally difficult and tedious activity. Therefore, automatic welding, with sound welding properties and a high-speed process, is necessary to meet the production demands. Welding conditions can be optimized by controlling various parameters to obtain suitable and highly reliable microstructural properties. In this study, the heat affected zone and weld defects of fillet-welded Angle and T-bar parts were investigated in terms of their microstructural, macrostructural, and mechanical properties to ensure the soundness of AH36 section steel parts joined by continuous welds.

• 한국산업융합학회 논문집
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• 제24권6_2호
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• pp.899-908
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• 2021

It is expected that the global market for vessel repair and remodeling will grow up to the scale of about 25 billion dollars by 2023. Korea's shipbuilding industry is leading the world with its international competitiveness in design and production technology. The actual status of vessel repair industry, however, is poor as there are only two or three companies for vessel repair that can deal with large vessels in the area of Gyeongnam. The reason is that civil complaints are filed severely about environmental problems and environment-related regulations are so strict that it is fairly hard to get governmental approval for the operation of a vessel repair workplace. Domestic vessel repair companies mainly target small- and medium-sized vessels. There are only few workplaces that can carry out regular examination or repair work on large vessels such as LNG vessels, and due to the high price of vessel repair, most of the domestic repair work on large vessels including LNG vessels tends to be snatched by markets in Southeast Asia or China. Despite the tremendous domestic demand of Korea that has established the world's first shipbuilding industry and world's sixth biggest harbor infrastructure, its vessel repair industry can be said to be in very poor condition. In order to vitalize vessel repair industry, this study is aimed to analyze the environmental influence of vessel repair workplaces in Gyeongnam where vessel repair companies are concentrated and suggest standard processes by analyzing vessel repair processes precisely.