NUMERICALLY GENERATED OCEAN WAVES BASED ON WALSH FUNCTION

The Walsh function is a rectangular waveform taking only two amplitude value 1, it satisfies orthogonality and is a complete function set. It is similar to sin-cos function. The frequency of sinusoidal function corresponds to the sequency to the Walsh function. Fourier transformation and FFT correspond to Walsh transformation and fast Walsh transformation respectively. In this paper the authors show the procedure to generate the Walsh function. They derive the procedure to transform the ocean wave spectrum in the frequency domain to that in the sequency domain. They simulate irregular ocean waves based on the Walsh function which correspond to the wave spectrum in the sequency domain. Finally they discuss the computational time of this simulation comparing it with that of the sinusoidal function. The authors conclude that the Walsh function is useful to reduce the computational time of ocean wave simulation. See also the following abstract.

  • 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 113 [8 p, 13 ref, 10 fig]
  • Authors:
    • Maeda, H
    • MIYAJIMA, S
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717690
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM