Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Study on Wave Generation Technique and Estimation of Directional Wave Spectra for Multi-Directional Irregular Waves

다방향 불규칙파에 대한 조파 기법 및 방향 스펙트럼 추정 연구

  • Seunghoon Oh (Korea Research Institute of Ships and Ocean Engineering) ;
  • Sungjun Jung (Korea Research Institute of Ships and Ocean Engineering) ;
  • Sung-Chul Hwang (Korea Research Institute of Ships and Ocean Engineering) ;
  • Eun-Soo Kim (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Hong-Gun Sung (Korea Research Institute of Ships and Ocean Engineering)
  • 오승훈 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 정성준 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 황성철 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 김은수 (부산대학교 조선해양공학과) ;
  • 성홍근 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Received : 2023.06.21
  • Accepted : 2023.07.13
  • Published : 2023.08.20
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Abstract

In this study, fundamental research is conducted for the generation technique and analysis of multi-directional irregular waves in the Deep Ocean Engineering Basin (DOEB). A three-dimensional boundary element method-based numerical tank is implemented to perform wave generation simulations, and directional spectrum estimation is carried out using the results of simulations. The wave generation technique of the Snake type wave maker, generating multi-directional irregular waves, is implemented using the Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) algorithms. The wave generation technique is validated by comparing the wave spectrum from simulations and experiments. A Maximum Likelihood Method (MLM) based estimation code is developed for estimating the directional wave spectra. The multi-directional irregular waves are tested in the DOEB and the numerical tank, and directional wave spectra obtained from two methodologies are estimated and compared. A correction procedure for the directional distribution of multi-directional waves is established, and the possibility of correcting the directional spreading function using the numerical tank is validated.

Keywords

Acknowledgement

본 연구는 선박해양플랜트연구소에서 지원하는 "심해용 복합해양 플랫폼 통합 성능평가 기술개발"(PES4760)의 결과물임을 밝히는 바입니다.

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