MEASUREMENT AND ANALYSIS OF RADIATION AND DIFFRACTION WAVES AT HIGH FROUDE NUMBER

An attempt was made to improve an experimental technique to study radiation and diffraction waves of a ship at forward speed previously proposed by one of the authors. The aim was to use the technique for measuring and analysing the radiation and diffraction waves at high Froude number in a seakeeping study of a high speed ship. Measured diffraction wave patterns of a high speed ship obtained by this technique are presented. A new method of Fourier transforming those patterns is proposed to determine their Kochin functions more correctly at high speed than the previous method. Inaccuracy of the so-called high speed theory in predicting the diffraction waves of the high speed ship is revealed by direct comparison of the measured and theoretically computed wave pattern. It was found that this was caused by ignoring the transverse waves which should not be ignored even at high Froude number.

• Supplemental Notes:
  • J Soc Naval Arch Japan, v 175, June 1994, p 79 [8 p, 9 ref, 12 fig]
• Authors:
  • Ohkusu, M
  • Yasunga, M
  • INADA, M
• Publication Date: 1994

Language

• Japanese

Subject/Index Terms

• TRT Terms: Diffraction; Froude number; Seakeeping; Wave measurement
• Old TRIS Terms: Wave diffraction; Wave radiation
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00708883
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM