저속시 선체에 작용하는 유체력 수학모형 정립을 위한 모형시험 방안 연구

Abstract

The mathematical models of hydrodynamic force and moment acting on a ship at low speed range should be established differently from the ones at nominal cruising speed range since a ship moves with large drift angle or rotates in a stationary position. We modified widely used Yoshimura's cross flow model in order to apply the system identification method to estimate parameters in the model. The apparatus and the procedure of free running model test was suggested so that the parameters in the model be estimated. We confirmed validity of the modified model by comparison with the model test results and suggested test scheme to estimate the parameters by the simulation study.