Fundamental Study for the Development of an Optimum Hull Form

J. Ocean Eng. Technol. 2004;18(3):32-39.

최적선형개발에 대한 기초연구

최희종,전호환,정석호

부산대학교 조선해양공학과,부산대학교 조선해양공학과,STX 조선주식회사 특수사업본부

Keywords: Optimum Hull Form, Minimum Resistance, Panel Method, Sequential Quadratic Programming, Wigley Hull

핵심용어: 최적선형, 최소저항, 패널법, 순차이차계획법, 위글리선형

Abstract

A design procedure for a ship with minimum total resistance has been developed using a numerical optimization method called SQP(sequential quadratic programming) to search for different optimal hull forms. The frictional resistance has been estimated using the ITTC 1957 model-ship correlation line formula, and the wave resistance has been evaluated using a potential-flow panel method that is based on Rankine sources with nonlinear free surface boundary conditions. The geometry of a hull surface has been modified using B-spline surface patches, during the whole optimization process. The numerical analyses have been carried out for the modified Wilgey hull at three different speeds (Fn=0.25, 0.316, 0.408), and the calculation results were compared.