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 36
... evaluated numerically but analytical integration is possible with the following approximation ∞ 1 α Į ym + 1 exp [ - ( y2 / 2 ) ] $ ( ay / c ) dy ≈ ( √2 ) m a $ ( œy / e ) г ( m + 2 ) ( 17 ) Em + 2 [ m + √27 Substituting this into ...
... evaluated numerically but analytical integration is possible with the following approximation ∞ 1 α Į ym + 1 exp [ - ( y2 / 2 ) ] $ ( ay / c ) dy ≈ ( √2 ) m a $ ( œy / e ) г ( m + 2 ) ( 17 ) Em + 2 [ m + √27 Substituting this into ...
Page 39
... evaluated iteratively using • ' [ a ¥ éq ] = d ' { ¦ [ ( √2 ) m - 1 εm + 2 √27 Y [ TM + 1 ; Yth ( a ) ] + ( √2 ) m a · [ ¤yea ] y [ m2 ; yth ( a ) ] ] ' ' } ( 32 ) Computer sub - routines are available to evaluate the incomplete ...
... evaluated iteratively using • ' [ a ¥ éq ] = d ' { ¦ [ ( √2 ) m - 1 εm + 2 √27 Y [ TM + 1 ; Yth ( a ) ] + ( √2 ) m a · [ ¤yea ] y [ m2 ; yth ( a ) ] ] ' ' } ( 32 ) Computer sub - routines are available to evaluate the incomplete ...
Page 264
... evaluated result on the ith factor is Table . 1 ( 44 ) N ( 10 ) N N N N2 N , ABC .20 .40 .60 .80 .50 .75 .875 .94 .30 .55 .75 .90 1.0 3885 1.0 1.0 B1 = UR ; = [ bik xp where bik = 2 ; rijk ( i = 1,2 , ... , n ; k = 1,2 , ... ..p ) ( 45 ) ...
... evaluated result on the ith factor is Table . 1 ( 44 ) N ( 10 ) N N N N2 N , ABC .20 .40 .60 .80 .50 .75 .875 .94 .30 .55 .75 .90 1.0 3885 1.0 1.0 B1 = UR ; = [ bik xp where bik = 2 ; rijk ( i = 1,2 , ... , n ; k = 1,2 , ... ..p ) ( 45 ) ...
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