PRESSURE DISTRIBUTION ON A CYLINDER OSCILLATING CLOSE TO A PLANE BED

This paper presents the results of experimental investigations with respect to the pressure distribution on a cylinder oscillating close to a plane bed in still water. Experiments pertain to two gaps between the cylinder and the plane bed expressed as ratios of the diameter of the cylinder of 1.0 and 0.1. The Keulegan-Carpenter number of the experiments was 20. Only one pressure transducer was used at a time and the whole circumference of the cylinder was traversed to obtain temporal variations of pressures at various positions. A data acquisition system was developed to take account of the changes in the period of motion of the cylinder during an experimental run of 48 cycles. The patterns of time mean pressures compare well with the instantaneous pressure distribution reported by Sumer et al (1991). The pressures exerted on the cylinder at different positions but not simultaneously, were used to construct pressure patterns on the cylinder at various phases of cycles of oscillation of the cylinder extending to 48 cycles. The hydrodynamic forces estimated through integration of the mean pressure distribution are compared with those of other investigators. The experiment results give further insight into the pressure distribution around cylinders oscillating near a stationary bed plane.

  • Supplemental Notes:
    • OMAE 1995, 14th Intl Conf on Offshore Mechanics & Arctic Engng; 18-22 June 1995; Copenhagen, Denmark. Sponsored by ASME et al. Procs. Publ by ASME, ISBN 0-7918-1306-1. Vol I, Pt A, p 411 [13 p, 12 ref, 10 fig]
  • Authors:
    • Dadman, R
    • Narayanan, R
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00718289
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 27 1996 12:00AM