... hydrodynamic research is presented with the objective of highlighting the parameters that affect riser added mass coefficient (C a ) and drag coefficient (C d ). Typical riser analysis is conducted assuming constant values of hydrodynamic coefficients. However, depending on the flow regime, the hydrodynamic...

... drag and added mass coefficients, and their variation for different scenarios. These coefficients Figure 12 Module and AF released from CGF 8 OTC-27078-MS have been calculated based on a batch of reduced scale model tests, conducted by Oceanide in a 40m long, 16m wide and up to 5m depth basin, located...

... vertical cylinder otc 6406 mass coefficient heave upstream oil & gas natural frequency oscillation tlp phase angle caisson cylinder natural period OTC 6406 Added Mass and Damping of a TLP Column Model S.K. Chakrabarti, Chicago Bridge & Iron Technical Services Co., and S.Y. Hanna, Conoco...

... that the added mass values determined from potential flow theory are adequate also for real flows. A procedure for determining the added mass coefficients for single cylinders and groups of cylinders has been developed, and results are given for 4 different configurations. INTRODUCTION Researchers...

... loads were recorded. The data was analyzed to determine the effect of . the wave amp1i tude and frequency as well as the current on the dampi ng factor and the added mass coefficient. The first order responses and steady drift loads resulting from the regular waves are also presented. INTRODUCTION...

... rough circular cylinder circular cylinder harmonically smooth cylinder end plate coefficient reynolds number small cylinder hydrodynamic force rough cylinder drag coefficient cylinder maximum lift coefficient roughness high reynolds number experiment lift force mass coefficient...

... riser analysis riser drag coefficient coefficient reynolds number keulegan-carpenter number inertia coefficient maximum reynolds number sensitivity constant coefficient water depth hydrodynamic coefficient variation drilling riser mass coefficient production riser keu1egan...

... this program. fender stiffness fender fender force proceedings impact load navigational congress technology conference ship deflection stiffness equation netherlands coefficient sway momentum equation energy equation mass coefficient offshore technology conference kinetic energy...

... ABSTRACT A major problem with full-scale wave force experiments has been the derivation of Drag and Added Mass coefficients from the resulting data. Typically, derivations based on short samples of data (wave-by-wave procedures) show wide scatter and recourse is usually made to averaging data...

... (surge or sway) plane [3J 21T I (1+a zz ) \ Tzz = r (12*TPI + K ) 'V g zz in the heaving plane [4J By assuming the added mass coefficients, equations [3J and [4J give the natural period for heave, sway and surge. These values can be used as first estimation to insure that the system's resonance...

... coefficient amplitude mass coefficient logarithmic decrement coefficient frequency wave height water condition drift force low-frequency hydrodynamic coefficient mooring system OTC 3625 THE INFLUENCE OF WAVES ON THE LOW-FREQUENCY HYDRODYNAMIC COEFFICIENTS OF MOORED VESSELS by J.E.W. Wichers...

... of the element. The principal part of all members is deeply submerged below the free surface and, therefore, infinite fluid values may be used for damping and added mass coefficients. By this assumption, drag forces due to wave dissipation are effectively neglected. The so-called "Morison formula...

... of vortex shedding can predict the drag force acting on the cylinder. The Strouhal number is a function of the gap below the cylinder. The added mass coefficient is much larger when the cylinder is near the boundary than when it is a free stream. INTRODUCTION Vertical and horizontal hydrodynamic forces...

.... The added mass forces due to the acceleration of the line through the still fluid were con- sidered in the usual way. The pressure force on the accelerating line is charac- terized by the displaced mass of fluid times the added mass coefficient, which was assumed to be zero for the tangential direction...

...- keel clearances, which can be used for . cient and zero damping. The choice of the practical applications. added mass coefficient has always been a An example is given how to use the data for the prediction of maximum fender loads and the results of the calculations are 666 THE BERTHING OFA LARGE...

... coefficient aspectratio displacedmass frequency oscillation squareroot fluid pressure hydrodynamic inertia mass coefficient amplitude equation cylinder reservoir characterization offshore technology conference frecluency upstream oil & gas configuration dampingcoefficient...

... are made. Numerical results for these submerged structures are presented in the form of a dimensionless hydrodynamic load parameter or added mass coefficient. Results corresponding to a number of different water depths are presented to show the rather sizable effect of the relative water depth...

... mass coefficient wave interaction approximate theory coefficient reservoir characterization wave height vertical force coefficient interaction small value morison equation force coefficient velocity potential diffraction effect viscous effect equation free surface diffraction...