Springing Force Response of a Tension Leg Platform

Strategies for Nonlinear Analysis of Marine Structures

“…The heave damping factor obtained from the pluck test of a TLP model discussed earlier [Petrauskas and Liu (1987)] was found to range from 0.11 percent to 1.6 percent. The corresponding prototype values should be even smaller if they are assumed to be dependent on the Reynolds number.…”

“…The springing forces on a large scale (1:16) TLP model were measured in a test in the CBI tank [Petrauskas and Liu (1987)] with a four-legged TLP hull connected to the sea floor with four vertical tendons. The springing forces arised from the resonant pitch periods of about 3 seconds.…”

Potential-based boundary element method to calculate the hydrodynamic drift force on the floating cylinder

“…In an irregular sea condition that consists of regular wave components superposition, the high and low-frequencies second-order hydrodynamic forces, in the sum and the difference of frequencies formed from linear waves. These nonlinear waves can play an important role in stimulating some of the most important phenomena such as slow drift motion [6]. Several papers concern methods to investigate second-order interaction between waves and structure.…”

Resonance of a tension leg platform exited by third-harmonic force in nonlinear regular waves

“…The Norwegian Petroleum Directorate and the UK Health and Safety Executive jointly funded a project named 'Higher order wave load effects on large volume structures' in 1993 [3], which focused on a series of field observations, experimental models and numerical simulation research of TLPs and GBS, and produced some very valuable results. Petrauskas & Liu [4] carried out two model tests on springing, one measuring springing forces on a vertical cylinder and the other measuring the response of a TLP. Extensive experiments have also been conducted to study the ringing phenomenon with a circular cylinder in the wave tank [5][6][7].…”