The effects of wave spreading on the exciting forces on a tension leg platform
The effects of wave spreading on the exciting forces on a tension leg platform
- Neue Suche nach: Dietrich, R.A.
- Neue Suche nach: Dietrich, R.A.
Oil exploration in water deeper than 1000 feet has motivated the development of drilling platforms with dynamic responses superior to those of the conventional jacket structures. One of the most promising of these is the tension leg platform (TLP), a semi-submersible platform held in place by tension members connected to the ocean bottom. This thesis evaluates the wave force transfer function for the TLP in heave, pitch, and roll motions. This is accomplished by assuming the transfer function for a single leg and then extending that result of include the effect of phase difference between forces on multiple legs, including the effect of wave spreading. Cosine squared directional wave spreading is discussed an then dismissed in favor of a Gaussian distribution of wave direction. Using the Gaussian distribution it is shown that when the wave spreading has a standard deviation greater than 0.5 radian the exciting force transfer functions in heavel, pitch, and roll converge rapidly to that computed for seas uniformly distributed over all incidence angles. (DePo)
Dokumentinformationen
The effects of wave spreading on the exciting forces on a tension leg platform
Auswirkung der Wellenausbreitung auf die, auf eine Bohrplattform mit Zugbeinen, wirkenden Erregungskraefte
US Government Research Reports ; May ; 1-73
1979
73 Seiten
Report
Englisch
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