Author(s): V. Sundar; V. Vengatesan; K.U. Graw

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Abstract: The wave-induced pressures around an inclined cylinder due to long and short crested waves are measured in a wave basin at an elevation of 0.8 m below still water level in a water depth of 3 m. The sleeve force normal to the cylinder axis was obtained by integrating the circumferential pressures and resolved in each of the three directions. The variations of the spectral density of the sleeve forces are presented. The effects of wave directionality on the pressures and sleeve forces are presented in the form of root mean square pressure and force ratios defined as normalized root mean square pressures / forces in short crested waves to that in long crested waves. The variations of the pressure and force ratios are discussed for the different mean wave directions and for different angles of inclinations of the cylinder with respect to the vertical plane. The pressure ratio is observed to be minimum when it is inclined at 45° along the wave direction. The maximum normal force ratio is about 25 to 37% less when cylinder is exposed to directional waves compared to being subjected to long crested waves.

DOI: https://doi.org/10.1080/00221680209499943

Year: 2002