NON LINEAR SYSTEM IDENTIFICATION OF OFFSHORE FLOATING STRUCTURES.

The article explores the response of Spar platforms from a model test using a system identification algorithm called the Empirical Mode Decomposition and Hilbert Transform (EMD/HT). It explains the results of the motion decay tests conducted to the platform to determine the responses of surge, heave and pitch for intact mooring condition. It cites the potential of the algorithm as a tool for assessing the fatigue damage of offshore structures in the presence of nonlinearities caused by waves and response.