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 255
... HEAVE 920 960 1000 [ sec . ] -1.5- Period Significant HEAVE = 1.66 m . 0.0 -3.0 10 . 20 . HEAVE Peak period = 10.7 sec . Significant ROLL = 4.64 deg . Significant PITCH = 2.1 deg . 3. 105 , S ( T ) , kN2.s - l TENSION AT TOP 4000 . 0.0 ...
... HEAVE 920 960 1000 [ sec . ] -1.5- Period Significant HEAVE = 1.66 m . 0.0 -3.0 10 . 20 . HEAVE Peak period = 10.7 sec . Significant ROLL = 4.64 deg . Significant PITCH = 2.1 deg . 3. 105 , S ( T ) , kN2.s - l TENSION AT TOP 4000 . 0.0 ...
Page 519
... Heave The equations of motion in heave can be written for the homogeneous case as : M1ÿ1 + c1ÿ1 + k1y1 + K2 ( Y1 - Y2 ) = 0 + K2 ( Y2 - Y1 ) = 0 where : M1 C1 M2 = mass of upper platform including hydrodynamic added mass in heave ...
... Heave The equations of motion in heave can be written for the homogeneous case as : M1ÿ1 + c1ÿ1 + k1y1 + K2 ( Y1 - Y2 ) = 0 + K2 ( Y2 - Y1 ) = 0 where : M1 C1 M2 = mass of upper platform including hydrodynamic added mass in heave ...
Page 520
... heave - stable platform , i.e. , its heave response over the practical range of wave periods ( say , 3 - 20 seconds ) is excellent , as can be noted from the heave transfer function shown in Figure 3. Two features in this transfer ...
... heave - stable platform , i.e. , its heave response over the practical range of wave periods ( say , 3 - 20 seconds ) is excellent , as can be noted from the heave transfer function shown in Figure 3. Two features in this transfer ...
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