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FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME
Industry Sector RTD Thematic Area DateMarine & Offshore Durability & Life Extension 13-11-2001
Fatigue analysis in Marine & Offshore
Jack ReijmersNevesbu, The Hague, The Netherlands
SummaryA brief encounter with fatigue topics in tankerconversion to FPSO‘s
FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME
RTD needs
Striptheory
Diffraction theory
Intermittent wetting
σ von Mises
σ Tresca
σ principle
FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME
Basics of Fatigue analysis
–Cyclic Load–Stress
–SN-curve–Damage (Palmgren-Miner)
–Statistical information on load distribution–Integration over lifetime
–Accumulated damage
–Marine environment extremely complex with respect to–Load description–Structural details to be considered
FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME
VeriStarShipRight
Fatigue programs
Nauticus
SafeHull
FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME
Focus on fatigue prone details
–New built vessels–Double Hull tankers
–Tanker Conversion to FPSO–Senior vessels from yore–Single hull tankers
Topview on sideshell
FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME
Source DNVClassification note 31.4
FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME
Points of attention
–RAO based on Striptheory versus Diffraction theory–Several load cases
–Head seas expected by weather-vaning vessel–Beam waves by swell and vessel in tidal current direction–Overall bending longitudinal in tension–Intermittent wetting longitudinal in bending
–Information on trading history–Reliability of SN-curves–Crack growth analysis (Paris-Erdogan)
FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME
Candidate topics for workshops /
Collaborative initiatives
Crack growth
FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME
Complex programin its childhood
Compare to FEMsome 50 years ago
