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
... modal damping ratio can also be expressed as modal damping ratio , n , as the percentage of the critical damping , which is used in association with viscous damping model . The relation between the logarithmic decrement & n and the ...
... modal damping ratio can also be expressed as modal damping ratio , n , as the percentage of the critical damping , which is used in association with viscous damping model . The relation between the logarithmic decrement & n and the ...
Page 580
... Modal amplitudes of LVDT FRFs also tend to decrease as crack lengths increase . Again for LVDT at first mode , the amplitude decreased from 1.660 to 1.640 , a change of only 1.21 % . Considering the strain FRF of the main column , the ...
... Modal amplitudes of LVDT FRFs also tend to decrease as crack lengths increase . Again for LVDT at first mode , the amplitude decreased from 1.660 to 1.640 , a change of only 1.21 % . Considering the strain FRF of the main column , the ...
Page 585
... modal damping , modal shapes and system transfer functions . Acoustic energy is radiated into the surrounding medium from the structural vibration . This acoustic energy carries considerable information about the state of the structure ...
... modal damping , modal shapes and system transfer functions . Acoustic energy is radiated into the surrounding medium from the structural vibration . This acoustic energy carries considerable information about the state of the structure ...
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