Author(s)

Carlos Alberto Bardanachvili

Abstract

— The tension leg platform (TLP) is a type of structural system for exploitation of oil and gas fields below sea floor and must be designed to avoid fatigue damage due to cyclic action of sea waves. Fatigue is a phenomenon which presents high randomness, making a probabilistic study of major concern. In this work, a methodology to obtain the probability distribution function of time to fatigue failure is applied to a point in the hull and to one tendon of a TLP designed for Campos Basin, offshore Brazil. The short term responses at these points are obtained through a stochastic analysis in frequency domain and Miner's rule is used to assess the fatigue damage. Long term statistics are introduced through a scatte

Keywords