Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 3American Society of Mechanical Engineers, 2002 - Arctic regions |
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Page 56
... Calculated 5 10 15 20 Anglerange ( deg 25 30 upc Ис = π [ p ̧ds R2 2EA sin2 a FIGURE 6 - SELECTED SLIP FORMULATION FIGURE 7 - MEASURED VERSUS CALCULATED MAXIMUM STRESS RANGE FOR ANGULAR POS . 0 ° Total Stress [ MPa ] 550 500 Position 90 ...
... Calculated 5 10 15 20 Anglerange ( deg 25 30 upc Ис = π [ p ̧ds R2 2EA sin2 a FIGURE 6 - SELECTED SLIP FORMULATION FIGURE 7 - MEASURED VERSUS CALCULATED MAXIMUM STRESS RANGE FOR ANGULAR POS . 0 ° Total Stress [ MPa ] 550 500 Position 90 ...
Page 57
... Calculated -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 Angle ( deg ) FIGURE 10- COMPARISON OF TOTAL STRESS HISTORY - STATION 1.5– ANGULAR POS . 0 ° – TEST 6 - Total stress ( MPa ) -100 100 50 Measured Calculated Total stress ...
... Calculated -1.2 -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 Angle ( deg ) FIGURE 10- COMPARISON OF TOTAL STRESS HISTORY - STATION 1.5– ANGULAR POS . 0 ° – TEST 6 - Total stress ( MPa ) -100 100 50 Measured Calculated Total stress ...
Page 108
... calculated the maximum nominal tensile stresses for the different sections of the legs based on the 100 - year wave . The most critical girth weld is CW80 , which comprise the transition between 420 and 690 steel . CW80 has a nominal ...
... calculated the maximum nominal tensile stresses for the different sections of the legs based on the 100 - year wave . The most critical girth weld is CW80 , which comprise the transition between 420 and 690 steel . CW80 has a nominal ...
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alloys analysis applied approximately assessment bending calculated carried coating compared composite compressive considered corrosion crack crack growth curve cycles damage defect deformation depth determined developed direction distribution effect element Engineering equation estimated evaluation experience factor failure fatigue field Figure flaw flexible fracture function geometry given Grade heat higher hydrogen important increase initial installation insulation integrity International joint length limit load locations lower material maximum mean measured mechanical method observed obtained Offshore operation parameters performed pipe plate predicted present pressure problem procedure production properties range reliability residual resistance respectively riser rope safety samples shown shows side simulation solution specimens standard steel strain strength stress structure surface Table temperature tensile tension thermal thickness titanium toughness uncertainties variables weld