Parametric Studies on Triangular Tension Leg Platform

Tension Leg Platform (TLP) is a buoyant platform held in place by mooring system.
TLP's are similar to conventional fixed platforms except that the platform is
maintained on location through the use of moorings held in tension by the buoyancy
of the hull. The cost for TLP increases with the water depth. More studies are going
on to find solution to reduce the cost on TLP design. This study focuses on the
influence of energy spectrum model on the triangular TLP. Pierson-Moskowitz (PM)
and JONSWAP spectrum were used in this study. Wave forces were estimated at the
instantaneous position of the platform by Morison's equation with Airy's linear
wave theory. Wave is considered to act unidirectional in the surge direction only. All
forces acting on the platform were calculated to determine the TLP's response in
surge, heave and pitch degrees of freedom. Lab test had been done to support and
justify the motion response calculated in the numerical calculation. As a conclusion.
only a small significant difference in surge. heave and pitch motion response
distance for both PM and JONSWAII energy spectrums. but the frequencies of the
TLP motion on surge. heave and pitch degree of freedom can effects the TLP tethers.