LARGE-AMPLITUDE ROLLING MOTION OF AN OCEAN SURVEY VESSEL

This paper describes some recently completed research at the Universit y of New Orleans into the nonlinear and coupled aspects of large ampli tude ship rolling motion, including capsizing, at all heading angles. The study analyzes the roll motion of a vessel which experienced large amplitude motions. By studying the nonlinear and coupled aspects of t he critical roll motion, insight into the important parameters affecti ng the roll was obtained. The roll was found to be multivalued and hig hly coupled to the sway and the yaw motion. Additional work has been c ompleted and more work is in progress to investigate additional aspect s of the subject vessel's motion.