... the model was developed to include wave kinematics procedures for both free and diffracted wave fields. For verification of the model, computed forces have been compared with measured forces from physical model tests with Ekofisk 2/4C and Ekofisk 2/4B. Good agreement between measured and computed forces...

... interaction and, as a result, it is of interest to examine the accuracy and potential bias of the method for extreme design conditions. In the API procedure, as also outlined in Ref. 2, wave kinematics are computed in a coordinate system moving at the steady current speed using an apparent wave period...

... Abstract Wave kinematics provide an important basis for wave load computations in design analyses of offshore structures. For simplicity, it is a standard practice in the offshore industry to use the linear wave theory and empirical stretchings to calculate wave kinematics. Popular stretching...

... ABSTRACT Wave kinematics models for calculation of wave velocity and acceleration and subsequently the loads on truss structures are discussed in this paper with particular emphasis on the use of the Wheeler method to calculate irregular wave kinematics. Necessary changes for very steep waves...

... waves over a short distance (from one platform legs to another). It is well known that linear random wave theory fails to predict irregular wave kinematics near the free surface, especially near the crests of steep waves. Considerable progress has been made in improving the accuracy of predicting...

... ABSTRACT Three common approximate methods known as Wheeler stretching, linear and vertical extrapolation are investigated to evaluate their application for predicting wave kinematics. The measured horizontal velocity of regular and dual component waves, which conceptual1y represent a very...

... to particular asymmetries not present in the Stokes wave, the transient wave kinematics under the crest are shown to be much more severe above the still water level and somewhat less severe below. This comparison suggests that it would be worthwhile to further investigate the use of extreme, transient waves...

... before adding them. Alternate methods of stretching the wave kinematics above the mean water level and two-dimensional simplifications of the theory were also tested. The standard method produced the best prediction of the fluctuating thrusts in the two instrumented members. Uncoupling the wave...

... of storm currents to wave kinematics, and to increases in drag coefficients (to recognize marine fouling effects). The result for a typical 8-1eg platform in 100 feet of water (Figure 1) was to increase the total wave forces by a factor of about 2.8. In the mid-1960's, there were about 700 major drilling...

... of convolution product of wave kinematics spectra. Then, the dynamic response includes both the linear part related with the wave and wind spectra and the main part of non linear drift forces in low and high frequency ranges. A comparison with a time domain analysis is presented. This comparison shows good...

.... platform forristall upstream oil & gas mean water line empirical model experiment rodenbusch water velocity artificial intelligence scatter plot extrapolation elevation wavelet amplitude wave kinematic machine learning free surface random directional wave amplitude simulation wavelet...

... ABSTRACT A method is described for improved prediction of wave kinematics from wave staff array records. This new procedure assigns directions, as well as amplitudes and phases, to wave components at each Fourier frequency, in such a way as to fit the wave staff records best. The water...

... ABSTRACT The usual method of calculating design hydrodynamic forces on a template-type structure involves the prediction of water particle velocities and accelerations from a design wave height and period. The forces on elements are then calculated from that description of the wave kinematics...