• 제목/요약/키워드: International Classification Society(IACS)

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국제선급(國際船級) 기술규칙(技術規則)의 통일화(統一化) 작업(作業)에 대하여 (On the Unified Requirements of IACS)

  • 박용철;이세창;마진섭
    • 대한조선학회지
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    • 제25권3호
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    • pp.46-54
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    • 1988
  • The International Association of Classification Societies(IACS) can trace its original back to the International Conference on Load Lines of 1930 and was established in 1968. Long before the formal foundation of IACS, a number of working parties existed to carry out studies of specific topics concerning technical rules of classification. The general terms of reference of the working groups of IACS are to draft unified rules and regulations between Societies, to study safety standards at the request of the International Maritime Organization(IMO) and to prepare unified interpretations of technical regulations of international conventions. As an associate member since 1975, the Korean Resister of Shipping has been actively attending the meeting of IACS working parties. In this paper, summaries of major agenda of the working parties including history of unified requirements and relevant technical tendencies are explained for the purpose of providing better understanding of the rule development.

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조선용 EH40 강판의 용접부 취성 균열전파정지에 관한 연구 (Study of Brittle Crack Propagation Welding for EH40 Steel Plate in Shipbuilding Steel)

  • 최경신;이상훈;정원지;황희건;홍석한;홍지웅
    • 한국기계가공학회지
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    • 제18권5호
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    • pp.9-16
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    • 2019
  • Recent economic trends are worsening and becoming longer, and Korean shipbuilding is focused on high value added and high technology, especially for LNG carriers and large container ships. Both ship types increased in size in the 2010s but have requirements such as high strength, toughness at low temperatures and continuous weldability for preventing brittle fractures at service temperatures. In particular, as container ships become larger, the International Classification Society (IACS) has established a provision (IACS UR S33) that mandates the use of BCA (Brittle Crack Arrest) certified vessels for large container vessels contracted after 2014 to ensure safety. Therefore, studies on BCA 47Y.P are currently being undertaken, but BCA 40Y.P has not been actively studied yet. We will test BCA 40Y.P to verify why it can be applied to a large container ship and measure fatigue cracking.

Suggestion of a design load equation for ice-ship impacts

  • Choi, Yun-Hyuk;Choi, Hye-Yeon;Lee, Chi-Seung;Kim, Myung-Hyun;Lee, Jae-Myung
    • International Journal of Naval Architecture and Ocean Engineering
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    • 제4권4호
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    • pp.386-402
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    • 2012
  • In this paper, a method to estimate ice loads as a function of the buttock angle of an icebreaker is presented with respect to polycrystalline freshwater ice. Ice model tests for different buttock angles and impact velocities are carried out to investigate ice pressure loads and tendencies of ice pressure loads in terms of failure modes. Experimental devices were fabricated with an idealized icebreaker bow shape, and medium-scale ice specimens were used. A dry-drop machine with a freefall system was used, and four pressure sensors were installed at the bottom to estimate ice pressure loads. An estimation equation was suggested on the basis of the test results. We analyzed the estimation equation for design ice loads of the International Association of Classification Societies (IACS) classification rules. We suggest an estimation equation considering the relation between ice load, buttock angle, and velocity by modifying the equations given in the IACS classification rules.

Kamsarmax급 CSR Bulk Carrier의 Forward Cargo Hold 구조적 특성 및 안정성 검증 (Structural Strength Assessment of Forward Cargo Hold for Kamsarmax CSR Bulk Carrier)

  • 황상욱;박정준
    • 대한조선학회 특별논문집
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    • 대한조선학회 2011년도 특별논문집
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    • pp.17-20
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    • 2011
  • The International Association of Classification Societies (IACS) had developed the Common Structural Rules (CSR) for bulk carriers as per the needs noted above. ISO and IMO GBS (Goal-Based Standards) are now being developed in this regard. This study has been prepared to verity the strength of forward cargo hold of 82,000 DWT class bulk carriers. A cargo hold/tank 3-D FE model was established to assess the structural adequacy of the primary structural members with the loading conditions. Full breadth model was established for the analysis considering asymmetric nature of structural layout and loading conditions. To summarize this result of structural assessment based on IACS CRS for bulk carrier, it is benefit to design this kind of bulk carriers and to study the strength assessment for the similar type of bulk carriers.

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선박용 프로세서 제어설비의 전자파 내성 시험규격(IACS) 개선안에 관한 연구 (A Study on the Improving Proposals of the lACS's EMS Test Requirments for the Micro Processor Control Equipments of the Commercial Ship)

  • 임재열;임준석;민경찬
    • 한국항해학회지
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    • 제22권4호
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    • pp.45-50
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    • 1998
  • A recently constructed commercial ship is a complexive integrated system like a small city in which has a generator, power distributing facilities, various radio equipments and high power circuit breakers are installed. Therfore it could make a malfunction of the microprocessor in the various control units which are so important during the ocean voyage of larger ship. This paper has studied whether is properly required or not on the view of the actual electro magnetic compatibility status on the electromagnetic interference and suceptibility test requirments listed on the IACS (International Association of the Classification Society). Through these results, we are looking forward to the new suggestions of the Electro Magnetic Compatibility test in order to reduce the malfunction in the ship regarding test item, test level, and test condition.

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선박 진동계측에 관한 국제 동향(ISO 20283) (Mechanical vibration-Measurements of vibration on ships(ISO 20283))

  • 이돈출;김재승
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2007년도 춘계학술대회논문집
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    • pp.550-555
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    • 2007
  • This paper introduces the mechanical vibration-measurements of vibration on ships(ISO 20283). Regulations and guidelines for vibration of hull structures, propulsion machinery and onboard equipments on ship were established mainly by classification societies or International Association of Classification Societies(IACS). The initial draft of ISO 20283 was proposed by USA and based on US military standards. Though these are not suitable to passenger and merchant ships, many experts have felt the need of the ISO regulation for the vibration measurement on ship. Hence, these standards are re-drafted and reviewed by particulate ISO members. In this paper, authors introduce the important agendas and the controversial items during setup of ISO 20283.

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선박용 연료전지 시스템 도입을 위한 국제 표준화 동향 분석 (Analysis of International Standardization Trend for the Application of Fuel Cell Systems on Ships)

  • 박상균;윤영민
    • 해양환경안전학회지
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    • 제20권5호
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    • pp.579-585
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    • 2014
  • 미래 친환경 선박 기술 중의 하나로 주목 받고 있는 연료전지 시스템의 선박 적용을 위해서 기술의 개발과 함께 필요한 것이 제도의 정비이다. 본 연구에서는 선박용 연료전지 개발동향, 연료전지시스템을 선박에 탑재하기위한 관련 국제기준으로 SOLAS와 IACS의 UR 및 UI을 검토하였고, IMO MEPC, IMO BLG 및 주요 선급 규정 등 연료전지 기준의 표준화 동향, 선박용 연료전지 기술기준의 개발시 고려되어야 할 사항 및 관련 제도의 국내도입을 위한 시사점까지 검토하였다. 현재 IMO에서 개발중인 IGF Code에는 연료전지 관련 부분이 포함되어, 본 규정 개발에 정부 및 국내 관련 기업체의 적극적인 참여가 필요하며 향후 IMO에서의 관련 규정개발 동향을 면밀하게 분석하고 적극적으로 대응할 필요가 있다.

대빙 등급 선박 추진 시스템의 기진 응답 평가 (Excitation Response Estimation of Polar Class Vessel Propulsion Shafting System)

  • 로날드 디 바로;이돈출
    • 한국소음진동공학회논문집
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    • 제21권12호
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    • pp.1166-1176
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    • 2011
  • 연중 운항할 수 있는 북극 항로 개설에 따른 전망으로 미개발 천연자원의 탐사와 짧아진 항로로 많은 기회를 부여하고 있다. 이는 환경과 거리가 먼 그리고 기술적인 경험 부족으로 해사 분야에서 커다란 도전으로 남아 있다. 엔진 설계자와 제작자는 이 지역에서 환경적 그리고 기술적으로 적합한 최적화된 추진시스템을 위하여 계속적인 조사를 하고 있고, 국제선급연합과 선급에서 인정하고 있는 대빙 등급 선박의 추진축계 설계를 위하여 통일된 규격의 여러 가지 특성에 대하여 개선할 필요가 있다. 대빙 등급 선박의 추진축계 시스템에서 주 기진력은 프로펠러와 빙 하중의 상호작용으로 인식하고 있고 국제선급연합에서는 빙의 파쇄와 충격하중으로만 간주하고 있지만, 추진축계 설계에 있어 시스템에 대한 여러 가지 인자의 특징을 고려하여야 한다. 이 논문은 종류가 다른 추진 시스템의 동적 응답에 영향을 주는 인자들에 평가하고 있고, 추후 추진 시스템의 설계단계에서 이러한 인자들이 충분한 역할을 갖는 것을 감안 고려해줄 것을 기대하고 있다.

선박 추진기계의 진동 계측과 평가(ISO 20283-4) (Measurement and Evaluation of Vibration of the Ship Propulsion Machinery (ISO 20283-4))

  • 이돈출
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2009년도 추계학술대회 논문집
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    • pp.560-564
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    • 2009
  • This paper introduces measurement and evaluation of vibration of the ship propulsion machinery (ISO 20283-4). ISO 20283-2 for measurement of structural vibration on ships was finalized last year and ISO 20283-4 was drafted and reviewed by particulate ISO members now. As the importance and core field in ISO 20283-4, the torsional vibration of propulsion system for sea going vessels should be analysed in design stage and it should be confirmed by the its measurement during the sea trial. Criteria for evaluation of torsional loadings are defined by IACS (International Association of Classification Societies) UR M68. In this paper, the author introduced the important and controversial matters during the review of ISO 20283-4.

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선박용 4행정 디젤엔진의 크랭크축 강도해석에 관한 연구 (A Study on the Strength Analysis of Crankshaft for 4 Stroke Marine Diesel Engine)

  • 이돈출;강대선
    • Journal of Advanced Marine Engineering and Technology
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    • 제30권3호
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    • pp.359-368
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    • 2006
  • The trend on marine diesel engine productions and refinements has led to a higher mean effective pressure and thermal efficiency. These resulted in increased maximum combustion pressure within the cylinder and vibratory torque in crankshaft. In view of this. the crankshaft should be able to withstand the dynamic stresses caused by load variations. Different factors including size, material and stress concentration factors should also be considered to ensure the reliability of the shafting system. As such, crankshaft must be designed and compacted within its fatigue strength. In this paper, the strength analysis of crankshaft Is carried out by: simplified method recommended by IACS(International Association Classification Societies) M53 and a detailed method with the crankshaft assumed as a continuous beam and bearing supported in its flexibility. The results of these two methods are then compared.