Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 9American Society of Mechanical Engineers, 1990 - Arctic regions |
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Page 2
... average number of enve- lope crossings per unit time above the threshold level , Ñ , is obtained as = = [ ® p ( ¤ ‚ à ) à dâ = ( 12 ) 3 p ( a ) ( 7 ) a p ( a ) = a2 exp ( - ) μο 2μο ( 1 ) while the rate of change of the envelope ...
... average number of enve- lope crossings per unit time above the threshold level , Ñ , is obtained as = = [ ® p ( ¤ ‚ à ) à dâ = ( 12 ) 3 p ( a ) ( 7 ) a p ( a ) = a2 exp ( - ) μο 2μο ( 1 ) while the rate of change of the envelope ...
Page 13
... ( average wave height ) Frequency H ( H ) f T ( T ) L Wave period 1 / f ( average wave period ) Wave length Sn ( f ) Wave spectral density ac Zero crossing wave crest height at Zero crossing wave trough excursion Te Crest period T1 Trough ...
... ( average wave height ) Frequency H ( H ) f T ( T ) L Wave period 1 / f ( average wave period ) Wave length Sn ( f ) Wave spectral density ac Zero crossing wave crest height at Zero crossing wave trough excursion Te Crest period T1 Trough ...
Page 62
... Average and Covariance of CD ' Table 2 Average and Covariance of CM ' Hrms¦ ¦ ( cm ) ¦ Uc 1 -30 1 -20 ¦ -10 ¦ ( cm / s ) ¦ Hrms ! | ( cm ) ¦ ! Uc 1 -30 1 -20 ¦ ( om / s ) ! -10 0 10 20 30 : 1 1 10.5 45.00 Average : 0.90 Covar . 0.05 ...
... Average and Covariance of CD ' Table 2 Average and Covariance of CM ' Hrms¦ ¦ ( cm ) ¦ Uc 1 -30 1 -20 ¦ -10 ¦ ( cm / s ) ¦ Hrms ! | ( cm ) ¦ ! Uc 1 -30 1 -20 ¦ ( om / s ) ! -10 0 10 20 30 : 1 1 10.5 45.00 Average : 0.90 Covar . 0.05 ...
Contents
OCEAN WAVES | 1 |
Simulation of Hurricane Seas in a Multidirectional Wave Basin | 17 |
OFFSHORE MECHANICS AND ARCTIC ENGINEERING | 25 |
Copyright | |
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acceleration added mass amplitude analysis boundary conditions calculated circular cylinder computed cosh crest cylinder array damping coefficient damping factor density diffraction domain drag coefficient drag force drift force dynamic effect equation estimated flow fluid force coefficients forces acting forward speed free surface heave horizontal hydrodynamic hydrodynamic forces incident wave inertia coefficients integral irregular Kc number lift force linear load low-frequency low-frequency oscillation maximum measured method motion nonlinear obtained offshore structures oscillatory parameters pile plate potential flow predicted quadratic rad/sec radiation condition ratio regular waves response Sarpkaya second order second-order semisubmersible shown in Figure simulation solution spectral density spectrum surface elevation surge swing tank tanker transfer function vector velocity potential viscous vortex shedding vortices water depth wave amplitude wave drift damping wave excitation wave force wave frequency wave groups wave height wave number wave period wave power