Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 9, Part 2American Society of Mechanical Engineers, 1990 - Arctic regions |
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Page 17
... example , the variabil- ity of the maximum wave height in a storm , or the vari- ability of storm characteristics ( forward speeds , tracks , wind speeds ) . Other uncertainties are obviously system- atic ( Class II ) ; for example ...
... example , the variabil- ity of the maximum wave height in a storm , or the vari- ability of storm characteristics ( forward speeds , tracks , wind speeds ) . Other uncertainties are obviously system- atic ( Class II ) ; for example ...
Page 65
... example TLP located in the northern North Sea is analyzed . For the example , the dominant failure mode of the weakest component ( joint ) in the design lifetime is fatigue crack growth . Upon loss of one tether , the risk of ...
... example TLP located in the northern North Sea is analyzed . For the example , the dominant failure mode of the weakest component ( joint ) in the design lifetime is fatigue crack growth . Upon loss of one tether , the risk of ...
Page 67
... example , we assume that the bending stress at the tether mid- point is 70 % of the total stress . The varying scale parameter can thus be expressed as Pf.k = 1 . - − [ ~ + ( x ) • ( ! x B1 - √px 1 - ρ dr ( 7 ) == A ( 8 ) A [ 0.3 + ...
... example , we assume that the bending stress at the tether mid- point is 70 % of the total stress . The varying scale parameter can thus be expressed as Pf.k = 1 . - − [ ~ + ( x ) • ( ! x B1 - √px 1 - ρ dr ( 7 ) == A ( 8 ) A [ 0.3 + ...
Contents
Investigation of the Ergodicity Assumption for Sea States in the Reliability Assessment of Offshore | 1 |
OFFSHORE TECHNOLOGY PART | 19 |
Fatigue Loading | 33 |
Copyright | |
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analysis applied approach approximately assessment assumed average basic calculated coefficient component computed considered constant corresponding cost crack growth curve cycles damage defect density depends depth derived described determined developed deviation distribution drag effects Engineering equation equivalent estimated evaluated example expected extreme factor failure failure probability fatigue Figure force fracture frequency function geometry given important included increase indicated initial inspection integration joints limit linear load Lognormal material maximum mean measured mechanics method normal obtained offshore structures operation parameters performed period platform predicted present pressure probabilistic probability procedure random variable range ratio reference relative reliability represent requirements respectively response risk safety shown shows significant simulation standard statistical storm strength stress structure surface Table tension tether tubular uncertainty variables variation wave wave height weld