Journal of the Korean Institute of Intelligent Systems (한국지능시스템학회논문지)

Korean Institute of Intelligent Systems (한국지능시스템학회)
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A Study on the Performance Prediction of Marine System using Approximation Model

근사모델을 이용한 해양시스템 성능예측에 관한 연구

  • Lee, Jae-chul (Naval Architecture and Ocean Engineering, Gyeongsang National University) ;
  • Shin, Sung-chul (Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Lee, Soon-Sub (Naval Architecture and Ocean Engineering, Gyeongsang National University) ;
  • Kang, Dong-hoon (Naval Architecture and Ocean Engineering, Gyeongsang National University) ;
  • Lee, Jong-Hyun (Naval Architecture and Ocean Engineering, Gyeongsang National University)
  • 이재철 (경상대학교 조선해양공학과) ;
  • 신성철 (부산대학교 조선해양공학과) ;
  • 이순섭 (경상대학교 조선해양공학과) ;
  • 강동훈 (경상대학교 조선해양공학과) ;
  • 이종현 (경상대학교 조선해양공학과)
  • Received : 2016.07.01
  • Accepted : 2016.08.03
  • Published : 2016.08.25
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Abstract

In the initial design stage, the geometry of systems needs to be optimized regarding its performance. However, performance analysis is very time-consuming. Therefore, optimization becomes difficult/impossible problems because we need to evaluate the system performance for alternative design cases. To overcome this problem, many researchers perform prediction of system performance using the approximation model. The response surface method (RSM) is typically used to predict the system performance in the various research fields, but it presents prediction errors for highly nonlinear systems. The major objective of this paper is to propose a proper prediction method for marine system problems. Case studies of marine systems (the substructure of a floating offshore wind turbine considering hydrodynamic performance and bulk carrier bottom stiffened panels considering structure performance) verify that the proposed method is applicable to performance prediction in marine systems.

초기설계 단계에서 시스템의 성능을 고려한 형상의 최적화가 필요하다. 하지만, 일반적으로 공학시스템의 성능예측은 많은 계산 시간이 요구되는 작업이다. 시스템 형상의 최적화를 위해서는 다양한 설계대안에 대한 성능의 평가가 요구되므로 초기 설계과정에서 많은 어려움이 있다. 이러한 문제를 해결하기 위해, 많은 연구자들은 응답표면방법을 이용한 성능예측에 관한 다양한 연구를 시도하고 있다. 하지만, 이 방법은 비선형성이 강한 문제에서 예측오차가 비교적 크게 발생하는 단점이 있다. 따라서 본 연구의 최종목표는 초기설계과정에서 성능예측을 위한 적절한 근사모델을 제시하고, 해양시스템 성능예측문제(부유식 해상발전기 하부구조물 최적화 문제, 유조선의 선저외판 최적화 문제)에 적용하여 제시된 근사모델을 검증하는 것이다.

Keywords

References

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