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 303
... vibration in its nth mode , its decay rate ( logarithmic decrement ) can be shown as , Fang [ 1 ] . бы = 2π . Плед 1+ √1 - n2 / cq neq ( 2.11 ) where nneq is the equivalent modal loss factor of the system when subjected to harmonic ...
... vibration in its nth mode , its decay rate ( logarithmic decrement ) can be shown as , Fang [ 1 ] . бы = 2π . Плед 1+ √1 - n2 / cq neq ( 2.11 ) where nneq is the equivalent modal loss factor of the system when subjected to harmonic ...
Page 306
... vibration frequencies as the vibrations decayed was more significant than that in the case of the free - hanging pipe . For instance , an increase of 25 % was noticed for the first normal - to- plane mode when the amplitude decayed from ...
... vibration frequencies as the vibrations decayed was more significant than that in the case of the free - hanging pipe . For instance , an increase of 25 % was noticed for the first normal - to- plane mode when the amplitude decayed from ...
Page 312
... vibrate for all flow velocities above the onset of instability . This is unlike vortex shedding , where the vibration amplitude will die out once the vortex shedding frequency breaks away from the structural frequency . Thus , it is ...
... vibrate for all flow velocities above the onset of instability . This is unlike vortex shedding , where the vibration amplitude will die out once the vortex shedding frequency breaks away from the structural frequency . Thus , it is ...
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