Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volumes 1-2American Society of Mechanical Engineers, 1992 - Arctic regions |
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Page 224
... Damping Models In order to study the measured resonant response , the acceleration timeseries were bandpass filtered ... damping force , Brouwers ( 1982 ) : -1 f ( u , ù ) = ε ú¦ù | × -1 ( 2 ) where is the damping coefficient . Depending ...
... Damping Models In order to study the measured resonant response , the acceleration timeseries were bandpass filtered ... damping force , Brouwers ( 1982 ) : -1 f ( u , ù ) = ε ú¦ù | × -1 ( 2 ) where is the damping coefficient . Depending ...
Page 225
... damping models , the relative damping ratio are dependent upon the motion amplitude . a . The following relations for the relative damping are obtained for the different models . We assume lightly damped systems : λ = ( 13 ) - Linear ...
... damping models , the relative damping ratio are dependent upon the motion amplitude . a . The following relations for the relative damping are obtained for the different models . We assume lightly damped systems : λ = ( 13 ) - Linear ...
Page 233
... damping matrix includes structural damping , soil - structure interaction and hydrodynamic potential damping . Normal modelling practice for the structural damping is to use a linear and viscous damping model . This is done by using a ...
... damping matrix includes structural damping , soil - structure interaction and hydrodynamic potential damping . Normal modelling practice for the structural damping is to use a linear and viscous damping model . This is done by using a ...
Contents
OCEAN WAVES AND CURRENT | 1 |
HYDRODYNAMIC FORCES | 69 |
17 | 90 |
Copyright | |
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added mass amplitude analysis axial behaviour boundary bubble buoy cable calculated Campos Basin coefficients compliant tower components configuration crane vessels cylinder damping model damping ratio developed direction displacement distribution domain drag coefficient drag force dynamic response effect Engineering equation estimated experimental Figure floating flow fluid heave motion hydrodynamic hydrodynamic damping installation interaction internal wave irregular waves Karunakaran length linear load matrix measured method modal mode model testing module natural frequency natural period nondimensional nonlinear obtained Ocean Offshore Structures operations oscillation parameters peak pipe pipeline platform pontoon potential predicted pressure ratio Rayleigh Rayleigh distribution resonant riser rotation second-order semisubmersible ship shown simulation spectra spectrum stiffness Stirling engine subsea surge tank technique tendon tension tethers transfer function values vector velocity velocity potential vertical vessel vibration water depth wave force wave height wave period