MEASUREMENT OF PRESSURES AND HYDRODYNAMIC FORCES ON A SHIPLIKE MODEL OSCILLATING IN A FREE SURFACE.
CALIFORNIA UNIV BERKELEY INST OF ENGINEERING RESEARCH
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A shiplike model was forced to oscillate in heave in still water to investigate the distribution of pressures, heaving forces, added-mass and damping coefficients along the length of the model. The heaving forces and phase angles measured at several sections are compared with values for corresponding two-dimensional cylinders of shiplike cross-sections calculated theoretically and experimentally confirmed. Results obtained from 3-dimensional theory and strip calculation are also provided for comparison. The total force, added-mass and damping coefficients are obtained in two ways first, by direct force measurement and then, by integrating the vertical components of pressures over the wetted surface of the model. Reasonable agreement has been found between these two different approaches. Author