Analyses |
 
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Analyses |
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The jack-up is subjected to gravity and buoyancy loading. The seabed nodes of the three legs are fixed in all the translational degrees of freedom (DOFs) and rotational DOF 4 (to ensure the model is statically determinate).
In addition to the initial static loads, wind and current loads are applied to the structure. The current profile has a piecewise-linear distribution. The wind forces are applied as point loads to the upper portions of each of the three legs. The BCs remain unchanged and are carried through automatically from the initial static analysis.
In addition to the above, regular wave loading is applied to the jack-up. The BCs remain unchanged and are carried through automatically from the current analysis
Similar to the time domain, no specification of boundary conditions is required in the frequency domain analysis. All of the BC data carries through from the current analysis.