Development of an Advisory Hull Fatigue Monitoring System

Abstract

In this paper the development of a monitoring system for hull fatigue of FPSOs is discussed. Fatigue assessment is subject to many uncertainties. Asset integrity can be improved by limiting these uncertainties. Continuous monitoring reduces these uncertainties, but requires extensive data analysis. Automated analyses are required to ensure the monitoring data is used in an optimal and consistent way. A joint effort of industrial partners has resulted in a smart data analysis system that shows fatigue accumulation in an easy-to-understand format. Sources of accelerated fatigue accumulation can be identified which enables rational actions to reduce lifetime consumption.

Quantifying uncertainties for Risk-Based Inspection planning using in-service Hull Structure Monitoring of FPSO hulls

“…[43]. However, in the present article, extensive use is made of HSM using a systematic data gathering and analysis system for FPSOs [44,45].…”

“…1. An overview of the location of several strain gauges installed in a cross section of the hull from [45]. The figure indicates (A) a strain gauge on a side shell stiffener, (B) one on a stringer and (C) a normal and (D) long base strain gauge on top of the longitudinal bulkhead.…”

Health-Monitoring Systems for Marine Structures: A Review

“…They determined the stress/strain level of the foremast during her normal operation to establish the effectiveness, quantity and configuration of the sails for the strain/stress level of the foremast. Hageman et al (2015) [ 143 ] conducted a hull fatigue monitoring system for FPSO by coupling a minimum sensor array with automated data planning processing to collect the hull response, fatigue loading and wave conditions encountered. Ferreira et al (2017) [ 144 ] described a fiber optic strain gauge sensor-based monitoring system used to recreate in real time the form of a sail using an algorithm developed and integrated to convert strain readings into deformations.…”