295 - Heave motion control of TLP under wave load using tuned mass damper
Tabeshpour M., Golafshani A., Seif M.
Abstract
Tension leg platform (TLP) is a complicated compliant offshore structure used for oil exploitation in deep water. Vibration in heave degree of freedom is one the most origin of fatigue in tendons of TLP. In this paper tuned mass damper is designed for heave motion control of TLP. Nonlinear dynamic analysis of TLP is carried out in time domain. The time history of regular wave is generated based on wave data. The hydrodynamic forces are calculated using the modified Morison equation according to Airy’s linear wave theory. The coupling of various degrees of freedom is considered. Differential equation of motion is solved using Modified Euler Method (MEM). The power spectral densities (PSDs) of displacements, velocities and accelerations are calculated from nonlinear responses. As an example a case study is investigated and numerical results are discussed.
Citation
Tabeshpour M.; Golafshani A.; Seif M.: Heave motion control of TLP under wave load using tuned mass damper , CD-ROM Proceedings of the Thirtheenth International Congress on Sound and Vibration (ICSV13), July 2-6, 2006, Vienna, Austria, Eds.: Eberhardsteiner, J.; Mang, H.A.; Waubke, H., Publisher: Vienna University of Technology, Austria, ISBN: 3-9501554-5-7
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