• 제목/요약/키워드: Shipyard

검색결과 370건 처리시간 0.022초

Wireless LAN 기반의 조선소 현장 정보시스템에 관한 연구 (A Study on the Shipbuilding Yard Information System Based on Wireless LAN)

  • 서관희;김형만;김수영
    • 한국해양공학회지
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    • 제19권6호통권67호
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    • pp.86-91
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    • 2005
  • Regarding some of tire important works in tire shipyard, like tire production process, quality control, and material handling, there are many elements that disturb tire work-flaw. For example, there are mistakes in manufacturing, delay of production, and poor quality. These kinds of disturbances are from tire delay of communication time between tire production field and tire management. Therefore, it would be possible to strengthen tire competitiveness of shipbuilding industries by applying tire information technology based on Wireless Local Area Network (Wireless LAN), in order to establish tire multi-possession of real time production information in limited large shipbuilding yard. In this study, tire construction concept of tire information system, based on Wireless LAN, is proposed to build communication infrastructures in shipyards. The various information regarding shipbuilding inspection, process management, and material flaw are analyzed and constructed to databases in tire middle ware system, as tire platform for using Personal Display Agent (PDA). At last, tire middle ware system, which delivers tire information, is developed by tire C$\sharp$ and Microsoft.net; also, tire PDA application system is structured in WinCE O/S, and is tested and evaluated under tire server linked condition.

47,000톤급 중형 크루즈선의 추진방식에 따른 선미부 형상과 저항특성 비교 (Comparison of the Stern Forms and Resistance Characteristics for G/T 47,000 Class Mid-size Cruise Ships)

  • 김동준;박현수;현범수;김무롱;최경식
    • 한국해양공학회지
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    • 제18권5호
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    • pp.57-63
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    • 2004
  • Various propulsion systems, applicable for a G/T 47,000 class mid-size cruise ship, are discussed and a comparative study on stern forms and hull resistance characteristics is carried out, in relation to these propulsion systems. Based on shipyard production logs on similar cruise ships, a reference hull form of a single shaft propulsion system with center-skeg, is generated. Then two new stern hull forms are derived by using a hull transform technique: consisting of one stern form using a twin-skeg system and the other using the Azipod system. Using a CFD-based commercial flaw analysis program, WAVIS (WAve and VIScous flaw analysis system for hull form development), various hydrodynamic characteristics, including wave profiles and ship hull resistance, are compared for three hull forms.

수중용 선체외판 길함 검사용 장치 개발 (An Underwater Inspection System to Detect Hull Defects of a Ship)

  • 김영진;조영준;이강원;손웅희
    • 한국해양공학회:학술대회논문집
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    • 한국해양공학회 2006년 창립20주년기념 정기학술대회 및 국제워크샵
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    • pp.281-284
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    • 2006
  • After building a ship in a shipyard, there are so many repeated inspection of welding seam defects and painting status before delivering to the ship's owner. An inspection on the bottom part of a ship in commercial service should be done in every two years for the purpose of safety and for the prevention of ship speed deterioration. conventional welding seam inspection systems are rely on the visual inspection by human or the ultrasonic inspection for the selective part of a ship. This paper suggests a remote controlled inspection system for the examination of large ships or steel structures. The proposed system moves in contact with the ship under inspection and have a CCD camera to provide visual-guidance information to a remotely located human worker. Additionally this system utilizes a weld line tracking algorithm for an optimal position control. We verified the effectiveness of the inspection system by experimental data.

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선박 및 해양플랜트 건조를 위한 측면주사음탐기 적용 사례 (Applications of Side Scan Sonar for Shipbuilding and Offshore Project)

  • 오형순;김태형;권순도;김성락;신성일;김상준;김성엽;우종식
    • 한국해양공학회지
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    • 제29권5호
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    • pp.373-379
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    • 2015
  • Side Scan Sonar (SSS) is capable of acquiring real-time data for seabed scouring, bathymetry, mine countermeasurement, etc. In a shipyard, an SSS package is utilized to measure the water depth and find debris in the sea because a sufficient water depth and non-interruption have to be ensured before implementing an underwater installation such as a large thruster. This paper presents the application and operation method of an SSS for the construction of an offshore project.

A study on market predictions of eco ship's engine and machinery

  • Lee, Kang Ki;Doh, Deog Hee;Kim, Ue Kan;Moon, Hyun Seok
    • Journal of Advanced Marine Engineering and Technology
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    • 제38권10호
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    • pp.1354-1359
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    • 2014
  • A survey is carried out for the future energy sources to be used for ship's propulsion and ship's machinery and operations. 44 global experts from Korea, America, Norway, Denmark, Japan and German who are currently working in the shipyard and offshore fields participated at the survey. Quantitative predications on the market shares of various energy sources, such as oil, LNG, fuel cell, wind energy, solar energy and nuclear energy are made. MPI (market prediction index) is considered as a quantitative index for easy comparison between future's energy sources used for ship's propulsion and operations. It is expected that the MPI of LNG becomes twofold in 2020 against 'before 2016'. It could be also said that hydrogen based fuel cell is expected to increase rapidly for the coming years unless a new alternative energy appears.

선박 블록의 이동 및 반전 시뮬레이션 프로그램 개발 (A CAD-based Software for the Simulation of Lifting and Turnover of Ship Block)

  • 이수범;신상범;곽병만
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2000년도 춘계학술대회논문집A
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    • pp.714-719
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    • 2000
  • In this paper, an application program is made to simulate the behavior of a ship block under various crane works and to generate data of lu9 reactions and wire tensions. The program is based on a CAD program, Pro/ENGINEER. A ship is composed of more than 100 ship blocks. In order to lift, move, turn, or put a ship block at a convenient location fur assembling, workers in a shipyard use cranes, wires, and lugs temporarily attached to the block. In the procedure of lifting and turning a ship block with a crane, it is important to find suitable lug points and wires to do the handling efficiently and prevent accidents. Evaluation of forces in lugs and wires is necessary, but the problem is rather complex due to nonlinearity and nonuniqueness. In the present development, the nonlinear system of equations for quasi-static equilibriums is derived and a Newton type solution method is adopted to solve the system. The importance of initial estimates to the solution is illustrated and two approaches are utilized and compared. With the program developed, users can assign lug points on the CAD model by mouse and choose various linking devices at each crane point. Users can try to simulate the motion for any prescribed conditions, compare the motion of the block and the reactions and choose appropriate lug points and the type of wires and lugs.

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Segmental Sensory Nerve Conduction Study in Vibration Exposed Subjects

  • Kim Mi-Jung;Yoon Cheol-In;Choi Hyun-Ju
    • 대한의생명과학회지
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    • 제11권2호
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    • pp.193-199
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    • 2005
  • The present study was performed to assess peripheral neural involvement by exposure to hand-arm vibration. Segmental sensory nerve conduction in the median and ulnar nerves were measured in shipyard workers exposed to vibration. The subjects were 47 male adults exposed to hand-arm vibration and 7 healthy male controls. The subjects underwent an extensive bilateral neurophysiological examination. Sensory compound nerve action potential (SNAP) of the median and ulnar nerves in palm-finger and wrist-palm segments were measured by antidromic method. And SNAP of the median and ulnar nerves in wrist-proximal finger and wrist-distal finger segments were measured by orthodromic method. Result of sensory nerve conduction study was abnormal in 31 patients $(66\%)$ and normal in 16 patients $(34\%)$ of subjects. The pathological pattern in the hand-arm vibration exposed group was 13 patients $(28\%)$ of carpal tunnel syndrome, 18 patients $(38\%)$ of distal sensory neuropathy, 7 patients $(15\%)$ of multifocal and 1 patient $(2\%)$ of Guyon syndrome. The present study indicates that vibration-induced nerve impairments exist both in the finger-palm and palm-wrist segment of median and ulnar sensory nerves. The results suggest that segmental sensory nerve conduction study would be useful as objective indication of peripheral nerve impairment induced by the hand-arm vibration.

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폴리에틸렌 보트의 열피로 손상의 실험적 평가 (A Experimental Estimation of Thermal Fatigue at Polyethylene Boat)

  • 조석수
    • 한국산학기술학회논문지
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    • 제14권6호
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    • pp.2559-2565
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    • 2013
  • 2000년 이후 FRP 보트 선체 제작에 대한 국제적 법적 규제가 강화되고 있다. 본 연구에서는 보트 선체 재료로 폴리에틸렌을 제안하였다. 폴리에틸렌은 저융점 재료로서 보트가 야외에 장기간 노출되는 경우 심각한 열피로를 받을 수 있다. 고밀도 폴리에틸렌 보트 선체에 대한 열적 내구성을 실험적으로 평가하기 위하여 삼점굽힘하중조건하에서 변형률 게이지를 이용하여 열응력을 측정한 뒤 열응력 데이터를 기초로 통계학적으로 열피로 손상을 분석하였다.

제약만족기법 기반의 최대부하감소를 통한 탑재 네크워크의 부하평준화 (Load Leveling of Block Erection Network Using Diminution of Maximum Load Based on Constraint Satisfaction Technique)

  • 류지성;김홍태;박진형;이병로;신종계
    • 대한조선학회논문집
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    • 제41권5호
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    • pp.55-62
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    • 2004
  • The logistics of entire shipbuilding process are integrated during the block erection process and the schedules for the erection process are made prior to. the schedules of any other processes. Therefore, efficient scheduling of the block erection process are one of most important issues in shipbuilding. There are only a few studies published regarding block erection scheduling methods because of its complexity and variability. This paper proposes an algorithm for diminution of maximum load based on constraint satisfaction technique. it is developed primarily for the efficiency in load leveling and applicability to the actual block erection process. The proposed algorithm is applied to actual block erection process and the results shows improvements in load leveling. It can also be used for the scheduling of fabrication, sub-assembly, and assembly to improve load leveling.

인터넷 서비스 기반의 선체외판 가공 연구 (Curved Hull Plate Forming based on SOAP Internet Services)

  • 김찬석;손승혁;신종계;이필립
    • 대한조선학회논문집
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    • 제53권1호
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    • pp.69-75
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    • 2016
  • Fabrication of the hull plate demands a lot of man-hour and a high degree of technology. In recent years, commercial shipping orders have been fallen because of intensifying competition with low price of order and labor cost. In order to solve this problem, a countermeasure such as a cost reduction is required. In this study, we are dealing with the method of supplying the forming information of the hull to the production site. We reviewed studies of hull forming that have been proposed so far to develop a method for providing hull forming information. On the basis of given production plans from the production site of shipyard, we discuss how to convert shell plate to production plan. Then, we will discuss the efficiency of the distribution method through the network about the method of hull forming. Thus, we have modified the distribution method which was proposed before. Finally, we will introduce the enhanced method for providing fabrication information of the hull plate to the small and medium-sized shipyards.