Responses of Triangular Tension Leg Platform Subjected to Random Waves

Tension leg platform (TLP) is suitable for deep water oil and gas exploration. The
nonlinear dynamic response analysis of TLP under random sea wave load is
necessary for determining the maximum deformations and stresses. Accurate and
reliable responses are needed for optimum design and control of the structure. In this
project nonlinear dynamic analysis of TLP is carried out in the frequency domain.
The time history of random wave is generated based on Pierson-Moskowitz spectrum
and acts on the structure in arbitrary direction. The hydrodynamic forces are
calculated using the modified Morison's equation according to Airy's linear wave
theory. The motion spectrum density of displacements is calculated from linear
responses. The focus of the paper is on the comprehensive interpretation of the
responses of the structure related to wave excitation and structural characteristics. A
case study is investigated and numerical results are discussed.