Direct wave force measurements on a model tension leg platform

Journal Article · Fri Jan 01 00:00:00 EST 1982 · Ocean Sci. Eng.; (United States)

OSTI ID:5355898

Vandiver, J K

A 1:50 scale model of a tension leg platform without tethers was rigidly attached to a five degree of freedom load cell frame. Regular waves with prototype periods of 4.7 to 14.1 seconds were passed through the model. For each wave frequency wave amplitude to wave force transfer functions were measured as a function of incidence angle. Wave incidence angles were varied in five degree increments. Force transfer functions for the five rigid body degrees of freedom in heave, pitch, roll, surge, and sway were measured and compared with numerical predictions. By applying the principle of reciprocity for linear wave forces, these results may be used to calculate the radiation (wave making) damping for motion of the TLP in these five rigid body modes. Furthermore the results may be used to directly estimate the dynamic response at a natural period of the tethered structure in heave, pitch, or roll, including the effects of directional wave spreading. Sample calculations of radiation damping and dynamic response prediction are included.

• Research Organization: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
• OSTI ID: 5355898
• Journal Information: Ocean Sci. Eng.; (United States), Vol. 7:4
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
OFFSHORE PLATFORMS
WAVE FORCES
MEASURING METHODS
AMPLITUDES
CALCULATION METHODS
DAMPING
DYNAMICS
FREQUENCY DEPENDENCE
INCIDENCE ANGLE
MECHANICAL STRUCTURES
ROLLING
TRANSFER FUNCTIONS
WAVE PROPAGATION
FABRICATION
FUNCTIONS
MATERIALS WORKING
MECHANICS
423000* - Engineering- Marine Engineering- (1980-)