173,000 CBM 액화천연가스 운반선의 선체변형을 고려한 추진축계 정렬해석 연구
A study on the hull deflections affecting propulsion shafting alignment for a 173,000 CBM liquefied natural gas carrier
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
선체변형이 축계 베어링 손상사고의 한 가지 원인으로 밝혀지면서 선주 및 선급에서는 선체변형을 고려한 보다강화된 축계정렬해석을 요구하고 있다. 또한 관련 기준 및 규정 또한 강화되고 있다. 이러한 업계와 선주 및 선급의요구에 부응하기 위하여, 본 연구에서는 173,000 CBM 액화천연가스의 흘수 변화에 따른 전선구조해석을 유한요소법을 이용하여 실시하고 전선구조해석으로부터 얻어진 축계의 상대변위를 이용하여 축계정렬해석을 수행하였다. 전선구조해석은 선박의 흘수 변화를 고려한 3가지 조건에서 수행하였다. 이를 바탕으로 선체변형에 따른 베어링 하중 변화가 축계정렬해석에 미치는 영향을 검토 하였다. 선체변형을 고려한 경우에서도 축계지지베어링 하중은 허용 하중 이내에 있는 것을 확인하였다.
Abstract
As the hull deflections have been identified as one of the causes for shafting bearing damage, a more strengthened shafting alignment analysis which is considered with hull deflections, is required by the Owner and Class. Moreover, the trend for the related criteria with rules has been strengthened. To meet the needs of the industry with the Owner and the Class, global structural analysis using the finite element method was performed for a 173,000CBM liquefied natural gas carrier according to the ship’s draft changes in this study. The shafting alignment was performed depending on the relative displacement of the shafting obtained by the global structural analysis carried out for three conditions considering the ship’s draft changes. Based on this, the effect of bearing load changes on the shafting alignment was reviewed due to the hull deflections. Even if the hull deflections are considered, all shafting bearing loads were observed to be within the permissible bearing load.
참고문헌 (11)
- M. Rudolph, "A quarter century of propulsion shafting design practice and operating experience in the U.S. navy", The Journal of the American Society of Naval Engineers Journal (NEJ), 71(1), pp.153~164 (1959)
- H. C. Anderson, "Co-ordinated alignment of line shaft, propulsion gear, and turbines", Annual Meeting of Society of Naval Architects and Marine Engineers(SNAME), 67, pp.449~523 (1959)
- W. E. Lehr, "Considerations in the design of marine propulsion shaft system", Society of Naval Architects and Marine Engineers (SNAME), 67, pp.555~601 (1961)
- Graeme Mann, "Shipyard alignment of propulsion shafting using fair curve alignment theory", The American Society of Naval Engineers Journal, 77(4), pp.651~659 (1965)[DOI]
- 이재웅, "스트레인 게이지를 이용한 5만 DWT급 석유화학제품운반선의 베어링 반력 및 선체변형량 분석에 관한 연구", 한국마린엔지니어링학회지, 40(4), pp.288~294 (2016), 한국마린엔지니어링학회[DOI]
- J. S. Sun, "A Study on Shaft Alignment of Propulsion Shafting System Depending on Reaction Supporting Position and Slope of Aft Stern Tube Bearing", pp.2017
- Class NK, "GUIDELINES ON SHAFTING ALIGNMENT" (2006)
- H. J. Jeon, "Ship Propulsion Transmission Equipment" (1986), Taehwa Publishing Company
- 이재웅, "베어링 강성을 고려한 10,100 TEU 컨테이너 운반선의 최적 추진축계 배치에 관한 사례 연구", 한국마린엔지니어링학회지, 40(3), pp.185~190 (2016), 한국마린엔지니어링학회[DOI]
- "Bearing Load Measurement by Jacking Up, ID No. 07424-5", ~ (2012)
- KR, "Rules for the Classification of Steel Ships Part 5 Chapter 3 206" (2015)