Background and Status of the FPSO Fatigue Capacity JIP

Lotsberg, Inge

doi:10.4043/12144-ms

Cited by 8 publications

(3 citation statements)

References 1 publication

(1 reference statement)

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“…In this screening, experience is used as described in the lessons learnt reports from UKOOA FPSO design guidance notes [2], OLF FPSO project 2002 [3], JIP FPSO capacity I and II ( [4], [5]) and also the guidelines from Tanker Structure Co-operative Forum [1]. The second decision to be made is on the selection of critical structural details and the location of the hotspots.…”

Section: Hull Modification and Lifetime Extensionmentioning

confidence: 99%

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FPSO Fatigue Assessment: Feedback From In-Service Inspections

Hoogeland¹,

Nat²,

Kaminski

2003

All Days

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Bluewater developed a hull fatigue strategy for her FPSOs. This strategy supports the decision process with respect to fatigue damage during the hull selection, hull modification and lifetime extension, hull monitoring/ inspection and offshore hull repair. The essential element in this process is the correct identification of the fatigue sensitive structural details and determination of their remaining fatigue life. As this remaining fatigue life can not be measured directly, a calculation procedure is necessary to estimate this remaining life.In the presented paper, the hull fatigue strategy is discussed and the side shell structure of FPSO Uisge Gorm is used as an example. After seven years of service as an FPSO, the applied strategy for the Uisge Gorm is evaluated. Using feedback from tank inspections, the predicted remaining fatigue life is compared with the actual cracks found. This information is used to improve the assessment procedure for fatigue sensitive structural details. The consequences for the hull fatigue strategy are discussed. Attention is given to improved models that predict the loading on the structural detail. In addition, some attention is given to (future) in-service monitoring systems that can determine this loading while the FPSO is at a field. Using such methods, the remaining hull fatigue life predictions will be updated continuously during the field lifetime.

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Section: Hull Modification and Lifetime Extensionmentioning

confidence: 99%

“…However, the presented factors must be applied with care, as even in laboratory conditions, large differences are already found [4]. However, in the hot spot, the stress level increases by a stress concentration factor, that is difficult to assess.…”

Section: Hull Modification and Lifetime Extensionmentioning

confidence: 99%

FPSO Fatigue Assessment: Feedback From In-Service Inspections

Hoogeland¹,

Nat²,

Kaminski

2003

All Days

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“…Floating structures of deep-water platforms, such as tension leg platform (TLPs), 9 SPARs, [10][11][12] semi-submersible platform (SEMIs), 13 and FPSOs, [14][15][16][17][18] have been successfully and widely applied, whereas the monitoring of SYMs in shallow water has seldom been reported. In this study, the method of monitoring SYM in Bohai Bay was carried out.…”

Section: Introductionmentioning

confidence: 99%

Study on the dynamic characteristics of a soft yoke mooring system for floating production storage and offloading based on field measurements

Fan

Yue

Qi³

et al. 2015

Advances in Mechanical Engineering

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The position and inclination of the mooring legs and yoke of a soft yoke mooring system for floating production storage and offloading in Bohai Bay were measured by full-scale monitoring technique. A novel multi-body dynamic analytical method of the horizontal restoring force for the soft yoke mooring system was established and investigated based on the monitoring data. The result predicted by the dynamic method agrees well with that obtained by fibre Bragg grating strain sensors. The peak value determined by the dynamic analysis is approximately 25% higher than that of the static results in harsh environments, which indicates the high reliability of the proposed method. After significant monitoring time, the advantages of the stability of the measurement by the proposed method are also manifested.

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Design Recommendations From the FPSO — Fatigue Capacity JIP

Lotsberg

2001

Practical Design of Ships and Other Floating Structures

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Background and Status of the FPSO Fatigue Capacity JIP

Cited by 8 publications

References 1 publication

FPSO Fatigue Assessment: Feedback From In-Service Inspections

FPSO Fatigue Assessment: Feedback From In-Service Inspections

Study on the dynamic characteristics of a soft yoke mooring system for floating production storage and offloading based on field measurements

Design Recommendations From the FPSO — Fatigue Capacity JIP

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