NONLINEAR DECOMPOSITION OF LABORATORY GENERATED IRREGULAR WAVES

This paper presents a methodology to decompose laboratory generated irregular waves into their linear and quadratic components. This is accomplished using Volterra modelling techniques without making any implicit assumption regarding the nature of the waves for the form of the quadratic transfer function. The paper presents the algorithm used to decompose irregular wave elevation, and demonstrates its feasibility by applying it to experimental data. The Volterra model is shown to accurately model the wave elevation expressed as the sum of linear and quadratic components. Though the total quadratic energy was small compared to the linear energy, the quadratic component was shown to contribute significantly toward accurately describing the surface elevation of the large waves. An example where the estimated Volterra kernals are used to predict the wave elevation at another spatial location is also discussed.

  • 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 1 [8 p, 14 ref, 6 fig]
  • Authors:
    • Duggai, A S
    • Johnson, P
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717679
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM