• 대한조선학회 특별논문집
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• 대한조선학회 2011년도 특별논문집
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• pp.12-16
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• 2011

During the shipbuilding construction, the repair works will be occurred by various reasons such as the natural disaster, mistakes of engineers or workers, defect of material, and so on. The one of the engineer's responsibilities is to design considering every possibility and to prevent the repair works due to the mistakes during construction stages, but actually it is very difficult and impossible to avoid every mistake. However, it is also the responsibility of engineers to find the best solution for the unavoidable mistakes which is to maintain the capacity of vessel and guarantee the safety for the repair works considering the construction schedules and economic cost. In this paper, it will be introduced the brief of repair works to the structural damage of the moon-pool structure in drillship which is built in our shipyard. For the verification of the structural strength, the fatigue analysis has been carried out based on the guide of Classification society. Furthermore, the modifications of structure design and welding procedure have been applied to avoid the stress concentration in the moon-pool structure.

• 한국환경보건학회지
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• 제34권4호
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• pp.279-284
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• 2008

This paper aims to provide basic data for work environment control, prevention of worker exposure to asbestos and improvement of air quality to protect workers ‘health after measuring the level of airborne asbestos and workers' exposure in a shipbuilding repair businesses. For this study, a total of 27 samples were collected from 27 workers who had been exposed to asbestos during engine, piping, boiler and other manufacturing processes in 'A' Shipbuilding Repair Company in Gyeongnam. This research was conducted from Oct. 1 to 30, 2007 and had the following results: The target group (27 workers) consisted of all men with an average age of 35.9 years and 6.6 years of work on average. Among them, fifteen 15 (55.6%) were smokers. In terms of their duties at work, there were 12 plumbing repair engineers (44.4%), 8 boiler repair engineers (29.6%) and 7 engine engineers (25.9%). The geometric mean concentration of airborne asbestos was 0.004 f/cc. A total of 4 samples exceeded the exposure limit. In particular, three exceeded the legal limit by more than double, which means that some workers have been highly exposed to asbestos. In terms of the concentration of asbestos fibres by work process, plumbing repair was the highest (0.0071 f/cc($0.001{\sim}0.57\;f/cc$)) while boiler was the lowest (0.0015 f/cc($0.001{\sim}0.007\;f/cc$)). Based on this study, proper action needs to be taken as soon as possible to protect workers from the threat of asbestos.

• 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.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.896-906
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• 2009

In Singapore, the construction industry's performance in safety has often been the worst among the other industries. This paper seeks to compare the efforts of the shipbuilding and repair industry and the construction industry in improving the level of safety performance. One key factor identified in the paper will be the subcontractors' role in the safety aspect. Based on the analysis of statistic carried out by the Ministry of Manpower of Singapore and many others, this paper aims to identify the success of the shipbuilding and repair industry and gives thought as to how the construction industry can further improve its safety record.

• 한국항만경제학회지
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• 제33권4호
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• pp.117-134
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• 2017

본 연구는 12개 중국 수리조선 업체를 대상으로 DEA모형을 활용해 중국 수리조선산업의 효율성을 분석하고자 하였다. 기존 연구들과 달리 본 연구에서는 연구대상 뿐만 아니라 선정된 투입과 산출변수도 차별성을 지닌다. 연구대상은 수리조선시장에서 경쟁우위를 보이고 있는 중국의 업체를 대상으로 진행하였다. 효율성 분석을 위한 투입변수는 시설 외에 기술자 수를 고려하였으며, 산출변수는 매출액 외에도 수리선 척수 및 서비스 범위를 사용하여 관련 변수들을 다양화하였다. 분석에는 DEA모형에 의하여 시설만 투입변수로 한 경우 및 시설과 기술자 수를 투입변수로 하여 차이점을 분석하였다. 비효율적인 DMU의 경우, 효율적인 DMU가 될 수 있도록 참조집합을 통해 비효율성의 원인을 찾아 장단점을 분석하였다. 또한 국영기업과 민영기업을 구분해서 개선방안을 도출하였다.

• 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.

• 해양환경안전학회지
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• 제27권1호
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• pp.172-178
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• 2021

선박 수리시장은 선박에 의한 환경오염 방지 강화, 선박구조에 대한 안전기준 강화 등의 영향으로 유지 및 보수에 관한 관심이 꾸준히 증대되고 있다. 이러한 영향을 반영하여 서남해에 있는 수리 조선사들에 외국 선사들의 수리 요청 접수 건수가 증가하고 있다. 그러나, 서남해권 수리 조선사들은 영세한 중소업체가 대부분이라서 수리조선 업체의 통합적 시너지 효과로 이어지기가 쉽지 않고, 집적화가 되어있지 않아서 인프라 공동활용이 어려워서 수리조선업 활성화에 걸림돌로 작용하고 있다. 수리조선업을 운영하기 위해서는 플로팅 도크가 필수적으로 필요로 하며, 대부분 노후화된 케이슨 도크를 해외로부터 수입한 후, 개/보수를 통하여 운용하고 있다. 그러나, 사용 수명이 30년 이상이고, 구조물 검사 기준이 없어서 안전분야에 취약성을 갖고 있다. 본 연구에서는 개조된 케이슨 도크의 구조 안전성을 평가하고, 도출된 문제점을 해결하기 위하여 추가적인 구조 보강안을 찾기 위하여 유한요소해석 프로그램인 ANSYS를 활용하였다. 플로팅 도크의 경우, 선급 규정이 있지만 구조강도 관련해서는 규정이 미흡하여 적용성이 떨어지고 있는 실정이다. 이러한 부족한 평가 영역에 대해서는 상세 구조해석을 통하여 보완하였다. 보강안은 수리조선소 작업의 특성을 고려하여 폰툰 갑판 상부 보강과 선측 탱크 보강으로 결정하였다. 결정안에 대한 구조해석을 통하여 선측 보강안을 최종안을 선정하였고, 실제 구조물을 제작하여 보강안을 반영하였다. 도출된 주요 결과들은 유사 설비의 구조 강도 개선을 위한 참고 자료로 활용 가능하며, 개/보수 시 이러한 방법을 활용하면 빨리 최적 해를 찾을 수 있을 것으로 기대된다.

• 한국해양공학회지
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• 제22권4호
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• pp.78-83
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• 2008

In recent years, small boats used for marine leisure have been steadily increasing because of the increase in national income and the desire for marine leisure. But the repair of such small boats in dry dock has pointed out many faults in small FRP-shipbuilding in terms if workspace and manpower. Lifting a boat from the water to land is done with a crane or by hand using a sling around the bottom of the boat. But dry dock work is limited by the scale of the boat, which corresponds to the crane capacity, with carelessness making it possible to capsize a boat and endanger life. The purpose of this study was the development of a marine docking system that would improve economical efficiency and safety, for which we carried out concept design, model tests, structural analysis, etc.

• Journal of Advanced Marine Engineering and Technology
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• 제31권6호
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• pp.810-817
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• 2007

Every ports is making great efforts to get competitiveness. It is progressing for the research on port model of new concept that connect port-related business to be developed from base running simple cargo processing to universal port that has economical efficiency and competitiveness, This research shows development way of Busan port that connect ship-repair industry which is port-related business. Development way is especially handled link between port and ship-repair industry field activation of high value-added ship as LNG etc.

• 해양환경안전학회지
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• 제25권1호
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• pp.122-129
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• 2019

신조 방식의 제조업의 특성상 경기 사이클이 존재하기 때문에, 장기적으로 이를 대처할 동반 산업이 절실하게 필요로 하고 있다. 이러한 요구에 적합한 분야가 수리조선업 분야이다. 수리조선업을 운영하기 위해서는 플로팅도크가 필수적으로 필요로 하며, 대부분 노후화된 플로팅도크를 해외로부터 수입한 후, 개/보수를 통하여 운용하고 있다. 그러나, 사용연한이 최소 30년 이상이고, 운용 시 특정 선급에 입급을 시키지 않기 때문에, 안전성에 대한 정확한 지침은 전무한 상태이다. 본 연구에서는 노후화된 플로팅도크의 계측한 두께 정보를 활용하여, 구조강도 검토를 수행하고, 운용중인 플로팅도크의 잔류 구조강도를 분석하였다. 연구를 통하여 도출된 주요 결과들은 유사 설비의 구조 안전성 검토에 대한 가이드라인을 참조할 수 있으며, 개/보수 시 이러한 방법을 활용하면 빠른 시간 내에 최적 해를 찾을 수 있을 것으로 기대된다.