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

  • 제55권1호
  • /
  • Pages.37-44
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  • 2018
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  • 1225-1143(pISSN)
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  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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대형 컨테이너 선박의 유탄성 실선 계측 데이터 분석 Part I - 모달 파라미터 추정

Full Scale Measurement Data Analysis of Large Container Carrier with Hydroelastic Response, Part I - Identification of Modal Parameters

  • 김병훈 (인하대학교 공과대학 조선해양공학과) ;
  • 최병기 (현대중공업 선박구조연구실) ;
  • 박준석 (현대중공업 선박구조연구실) ;
  • 박성건 (대우조선해양 중앙연구원) ;
  • 기혁근 (대우조선해양 중앙연구원) ;
  • 김유일 (인하대학교 공과대학 조선해양공학과)
  • Kim, Byounghoon (Department of Naval Architecture and Ocean Engineering, INHA University) ;
  • Choi, Byungki (Marine Structure Research Department, Hyundai Heavy Industries, Co., Ltd.) ;
  • Park, Junseok (Marine Structure Research Department, Hyundai Heavy Industries, Co., Ltd.) ;
  • Park, Sunggun (DSME R&D Institute, Daewoo Shipbuilding and Marine Engineering, Co., Ltd.) ;
  • Ki, Hyeokgeun (DSME R&D Institute, Daewoo Shipbuilding and Marine Engineering, Co., Ltd.) ;
  • Kim, Yooil (Department of Naval Architecture and Ocean Engineering, INHA University)
  • 투고 : 2017.09.28
  • 심사 : 2017.12.05
  • 발행 : 2018.02.20
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초록

To understand the dynamic characteristics of the vessel with hydroelastic response, it is very important to estimate the dynamic modal parameters such as mode shapes, natural frequency, and damping ratio. These dynamic modal parameters of full scale ship are a priori unknowns, hence to be estimated directly based upon the full scale measurement data. In this paper, dynamic modal parameters were extracted by signal processing of acceleration and strain data measured from a large container ship whose loading capacity is 9400TEU. The mode shapes of the vibrating hull were identified using the proper orthogonal decomposition and the vibration response of hull was decomposed into its modal magnitudes. Natural frequencies of specific modes were derived via Fourier transform of these modal magnitude. Also, the free decay signal of the vibrating hull was obtained through the random decrement technique and the damping ratio was estimated with accuracy.

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참고문헌

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