한국해양대학교

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선수파 중 선박의 부가저항과 운동성능 수치해석 및 검증

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dc.contributor.advisor 박선호 -
dc.contributor.author 서성욱 -
dc.date.accessioned 2019-12-16T02:41:32Z -
dc.date.available 2019-12-16T02:41:32Z -
dc.date.issued 2017 -
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/11339 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002329846 -
dc.description.abstract As the International Maritime Organization (IMO) recently introduced the Energy Efficiency Design Index (EEDI) for new ship buildings and the Energy Efficiency Operational Indicator (EEOI) for ship operations, thus an accurate estimation of added resistance of ships advancing in waves has become necessary. In the present study, OpenFOAM, computational fluid dynamics libraries of which source codes are open to the public, was used to predict the added resistance and motions of a ship. Unstructured grid using a hanging-node and cut-cell method was used to generate find grid around a free-surface and ship. A dynamic deformation mesh method was used to simulate the motions of the ship. Five wave lengths from a short wave length (λ/LPP=0.65) to a long wave length (λ/LPP=1.95) were considered as head waves. The grid uncertainty was evaluated with respect to three grid systems for a wave length of λ/LPP=1.15. The predicted added resistance, and heave and pitch motions with various head waves were compared with the data of model experiments. The wave pattern around the ship and motions of the ship analyzed with respect to individual waves. -
dc.description.tableofcontents 1. 서 론 1.1 연구 배경 1 1.2 연구 동향 2 1.2.1 포텐셜 이론 (Potential theory) 2 1.2.2 EFD (Experiment Fluid Dynamics) 3 1.2.3 CFD (Computational Fluid Dynamics) 4 1.2.4 OpenFOAM 5 1.3 연구 내용 6 2. 수치 모델링 2.1 지배방정식 8 2.2 체적비 이송방정식 (VOF) 9 2.3 난류 모델링 10 2.4 6자유도 운동 12 2.4.1 격자 변형 기법 12 2.4.2 6자유도 운동 해석 기법 13 2.5 수치 수조 구현 17 2.5.1 Relaxation zone 17 2.5.2 파 이론 18 3. 해석 방법 3.1 푸리에 시리즈 (Fourier Series) 20 3.2 부가저항 해석 21 3.3 운동응답 해석 22 3.4 불확실성 해석절차 22 4. 대상선의 제원 및 해석조건 4.1 대상선 25 4.2 해석 조건 26 4.3 시뮬레이션 조건 27 4.4 수치 방법 29 5. 해석결과 5.1 정수 중 30 5.2 파랑의 생성 32 5.3 불확실성 해석 35 5.4 부가저항 및 운동응답 수치해석 41 5.5 파랑별 선박의 부가저항 및 운동성능 변화 50 6. 결론 60 참고문헌 62 -
dc.format.extent 66 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.rights 한국해양대학교 논문은 저작권에 의해 보호받습니다. -
dc.title 선수파 중 선박의 부가저항과 운동성능 수치해석 및 검증 -
dc.type Dissertation -
dc.date.awarded 2017-02 -
dc.contributor.alternativeName Seo Seong Uk -
dc.contributor.department 대학원 해양공학과 -
dc.contributor.affiliation 한국해양대학교 대학원 -
dc.description.degree Master -
dc.subject.keyword 부가저항, 선박운동, 선수파, 불확실성 해석, 전산유체역학, 오픈폼 -
dc.type.local Text -
dc.title.translated Numerical Simulations and Validation of Added Resistance and Motions of a Ship in Head Waves -
dc.identifier.holdings 000000001979▲000000006780▲000002329846▲ -
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