추사파 중의 ROPAX 선박의 과대 횡동요에 대한 실험적 연구

Abstract

The roll motion characteristics of a ROPAX ship is investigated by free running model tests in the ocean engineering tank of MOERI. All the tests are carried out in the regular waves. To find out the effects of wave conditions on roll motion, wave conditions have been varied with wave length, wave steepness, incident angle and model speed. The influence of GM is also investigated with two different weight conditions. Six degree of motion is measured using RODYM and Vertical gyro. The side hull wave profile is recorded by video camera which is synchronized with motion data. Since the model speed can not be increased up to critical speed due to the limit of the length of tank, the capsizing is not observed. However, large roll motions over 35 degrees were observed for several conditions. In most cases roll starts to develop largely when wave crest passes between A.P and 1/4L aft and the roll motion reaches maximum when the crest passes mid-ship. The maximum roll always occurs in the lee side and then the heading is to the weather side.