0
RESEARCH PAPERS: Offshore Mechanics

Wave Loads and Motions of Long Structures in Directional Seas

[+] Author and Article Information
M. Isaacson, O. U. Nwogu

Department of Civil Engineering, The University of British Columbia, Vancouver, B.C., Canada

J. Offshore Mech. Arct. Eng 109(2), 126-132 (May 01, 1987) (7 pages) doi:10.1115/1.3257000 History: Received March 27, 1985; Revised May 07, 1986; Online October 30, 2009

Abstract

The present paper deals with the effects of wave directionality on the loads and motions of long structures. A numerical procedure based on Green’s theorem is developed to compute the exciting forces and hydrodynamic coefficients due to the interaction of a regular oblique wave train with an infinitely long, semi-immersed floating cylinder of arbitrary shape. The linear transfer function approach is used to determine the wave loads and motions of a structure of finite length in short-crested seas. The effect of wave directionality is expressed as a frequency-dependent, directionally averaged reduction factor for the wave loads and a response ratio for the body motions. Numerical results are presented for the force reduction factor and response ratio of a long floating box subject to a directional wave spectrum with a cosine-power-type energy spreading function.

Copyright © 1987 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In