... bi-frequency domain sum frequency frequency monochromatic wave mooring system equation upstream oil & gas surge response experiment dual wave subsea system coefficient drift force drift motion wave drift amplitude surge drift motion prediction excitation slow drift motion...

... pipe instabillty or buckling. This paper presents analytical methods for prediction of buckling potential, i.e. buckling load, length and amplitudes. The predicted behaviour will be presented as a function of geotechnical properties such as breakout resistance and an equivalent coefficient of friction...

... approach using correct modelling of tension ranges and counting of tension cycles is then studied. The study leads to the proposition of a modified HTFD approach to improve the reliability of line fatigue life prediction. 1. INTRODUCTION Mooring line failures have frequently occurred in the past...

... Manntek Trondhelm, Norway ABSTRACT Results are presented of a comparison between the observed behaviour of two model flexible riser systems subject to environmental loads and simulated floating production system vessel motion, and the behaviour predicted using a flexible riser computer modelling program...

... time using frequency domain techniques. The resulting force time history could be used as feed forward information by the controller of a dynamic positioning system, to improve performance and efficiency. This could be further enhanced by applying linear prediction techniques (eg an auto-regressive...

... assumption denote noise approximation stochastic linearization mssl standard method stochastic linearization method extreme response response level artificial intelligence deviation measure prediction procedure accurate estimate offshore structure exceedance probability equation...