Fully coupled analysis of offshore deck mating operation of a large topside module

Abstract

A fully coupled analysis has been performed for simulation of offshore mating operation for a large heavy topside module on a deck of FLNG. Fully coupled hydrodynamic interactions between the crane vessel which lifts up the heavy topside and a FLNG of which deck the mating is made on. Multiple crane wires and slings are modeled with linear spring while LMU guide is modeled as bi-linear spring. Special attention is paid for accurate prediction of coupled hydrodynamic coefficients and pendulum dynamics due to the hanging heavy object. Simulation results will be validated by comparing model test results on key parameter affecting deck mating operation of a heavy topside module on the deck of a pre-installed FLNG on site. Copyright ？ 2016 by the International Society of Offshore and Polar Engineers.