Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volumes 1-2American Society of Mechanical Engineers, 1991 - Arctic regions |
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Page 154
In such sea states, the wave force f (t) , up to the second order, in any mode on a floating body can be represented by the first two terms of a Volterra series : f(t) h(1)a(r)a(t-r)dr 4 -00 CO 00 + ||h(2)(r1,r2)a(t-T1)a(t-r2)dT1dr2 (1) ...
In such sea states, the wave force f (t) , up to the second order, in any mode on a floating body can be represented by the first two terms of a Volterra series : f(t) h(1)a(r)a(t-r)dr 4 -00 CO 00 + ||h(2)(r1,r2)a(t-T1)a(t-r2)dT1dr2 (1) ...
Page 182
An alternative is the 'square root of sum of squares' (SRSS) formula: low wave frequencies uc may be partly due to spurious ... extreme first-order and second-order forces, both of which tend to be associated with groups of high waves.
An alternative is the 'square root of sum of squares' (SRSS) formula: low wave frequencies uc may be partly due to spurious ... extreme first-order and second-order forces, both of which tend to be associated with groups of high waves.
Page 6
5 WAVE HEIGHTS AND WAVE PERIODS a 7 , mean of T / Tc , is a function of e close to 1.0 , Tc is the mean time interval between successive positive maxima and for a gaussian noise it is defined by 5.1 Wave steepness mza ' T. 27 - 1 ( 32 ) ...
5 WAVE HEIGHTS AND WAVE PERIODS a 7 , mean of T / Tc , is a function of e close to 1.0 , Tc is the mean time interval between successive positive maxima and for a gaussian noise it is defined by 5.1 Wave steepness mza ' T. 27 - 1 ( 32 ) ...
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Contents
SPECIAL SESSION HYDRODYNAMICS | 1 |
HYDRODYNAMIC FORCES | 29 |
Simulated High Reynolds Number Flow and Forces on Cylinder Groups | 71 |
Copyright | |
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acting amplitude analysis angle applied approach approximately assumed average body boundary cable calculated circular cylinder coefficients compared comparison components computed considered constant corresponding cylinder damping depth described determined diffraction direction distribution domain drag drift force effect element Engineering equation estimates experimental experiments expressed field Figure floating flow fluid follows free surface frequency function given height horizontal hydrodynamic included increase integral irregular waves length lift force linear loads mass maximum mean measured method mode mooring motion natural nonlinear obtained Ocean Offshore oscillation period phase platform points position potential predicted present pressure problem random range regular relative represents respectively response second order second-order separation ship shown shows simulation solution spectrum structure surge Table tests theory values velocity vertical vortex wave forces