A Study on the Motion Prediction for the Huge Semi-Submersible Structure in Waves

Abstract

This paper presents the practical prediction method of motion for the huge semisubmersible structure in waves The present method is based on the Hooft's assumption and modified his method. We have carried out forced oscillation tests, wave exciting force tests, and motion tests in beam sea condition. These results are compared with the calculation results from both the present method and three-dimensional singularity distribution method. As a result, the method presented in this paper predicts added mass coefficients, wave exciting forces and motion in waves practically.