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

The Society of Naval Architects of Korea (대한조선학회)
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A Method to Predict the Feasible Region of Geometric Centroid for Closed Hull Form Area Using Regression Analysis

회귀분석을 통한 선형 단면의 변환가능 중점영역 예측

  • Nguyen, Si Bang (Department of Naval Architecture & Ocean Systems Engineering, Korea Maritime & Ocean University) ;
  • Nam, Jong-Ho (Department of Naval Architecture & Ocean Systems Engineering, Korea Maritime & Ocean University) ;
  • Lee, Minkyu (Department of Naval Architecture & Ocean Systems Engineering, Korea Maritime & Ocean University)
  • ;
  • 남종호 (한국해양대학교 대학원 조선해양시스템공학과) ;
  • 이민규 (한국해양대학교 대학원 조선해양시스템공학과)
  • Received : 2017.05.08
  • Accepted : 2017.08.30
  • Published : 2017.10.20
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Abstract

There is a constant demand for hull variation related to ship design. Various input variables are generally given to achieve the objective functions assigned by each variation process. When dealing with geometric shapes accompanied by nonlinear operations during the variation process, vague relationships or uncertainties among input variables are commonly observed. Therefore, it is strongly recommended to identify those uncertainty factors in advance. A method to modify the shape of a closed hull form with a new area and a centroid had been introduced as a new process of hull variation. Since uncertainty between input variables still existed in the method, however, it was not easy for the user to enter the area and the corresponding centroid. To overcome this problem, a method is presented in this paper to provide the feasible region of centroids for a given area. By utilizing the concept and techniques used in the statistics such as the number of samples, probability, margin error, and level of confidence, this method generates the distribution of possible centroids along the regression curve. The result shows that the method helps the user to choose an appropriate input value following his or her design intention.

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References

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