## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 2American Society of Mechanical Engineers, 2001 - Arctic regions |

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Page 143

Near the top of the legs , where hinges are likely to occur under storm overload ,

the internal a value is

value for the global moment at mudline . Jack - up 2 and the portal section of Jack

...

Near the top of the legs , where hinges are likely to occur under storm overload ,

the internal a value is

**approximately**3.0 for both legs , which coincides with thevalue for the global moment at mudline . Jack - up 2 and the portal section of Jack

...

Page 360

For the case of the tube without perforation ( 0 A = ) , M , ' -M , ( sin ( W2 ) - sin ( x )

/ 2 } ( 1 ) MM , = cos { ( 1/2 ) ( P / P , ) } ( 7 ) Here , equations ( 6 ) and ( 7 ) are

D ) ...

For the case of the tube without perforation ( 0 A = ) , M , ' -M , ( sin ( W2 ) - sin ( x )

/ 2 } ( 1 ) MM , = cos { ( 1/2 ) ( P / P , ) } ( 7 ) Here , equations ( 6 ) and ( 7 ) are

**approximately**linearized as follow : where M , = 0 , ZA Z , — D't 0 1 = t - sin ' ( a /D ) ...

Page 378

The structural system is relatively slender with a length / diameter ratio of

prescribed timeharmonic displacements . The risers are modelled from the Spar

buoy to the ...

The structural system is relatively slender with a length / diameter ratio of

**approximately**3500. The floater motion is applied to the riser top nodes asprescribed timeharmonic displacements . The risers are modelled from the Spar

buoy to the ...

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