HYDRODYNAMIC PRESSURE ON A FULL SHIP IN SHORT WAVES

The ship length of a VLCC is long compared with the sea wave length. Hydrodynamic pressures on a full scale ship were measured to investigate wave loads on a VLCC. The predicted hydrodynamic distributions obtained at some sections with the New Strip (3DM) method (NSM) and a 3-dimensional Source Sink Method are compared with measured values. However, results predicted using NSM are not in good agreement with the measured ones in short waves. Predicted results using NSM with longitudinal cut are in good agreement with the measured ones in short waves only and predicted results with 3DM are in good agreement with measured ones in whole wave frequencies. From these results it is found that the diffracted wave from the bow and the bottom is an important term in estimating wave loads and hydrodynamic pressures in short waves. These diffracted waves are not taken into consideration for the diffracted wave term of NSM is developed with the diffracted waves calculated with 3DM for ships with different length/beam ratios. The predicted pressure distributions with this modified method for NSM are in good agreement with the measured pressure distributions in whole wave frequencies.

• Supplemental Notes:
  • J. Soc. Nav. Architects Japan, 166 (1989) p.251 (Dec.) [6 p., 16 ref., 1 tab., 16 fig.]
• Authors:
  • Ito, A
  • Mizoguchi, S
• Publication Date: 1989

Language

• Japanese

Subject/Index Terms

• TRT Terms: Mathematical models
• Old TRIS Terms: Hydrodynamic forces; Wave forces on ships
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00697682
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM