PREDICTION OF VIBRATION IN THE AFTERBODY OF SHIPS

The prediction of dynamic response in the afterbody of ships by means of a finite element formulation is discussed. The sub-space iteration method for solving the eigenvalue problem is found to be very efficient even when a reasonably large number of natural frequencies is present. For the forced vibration of large structural components in the afterbody such as superstructure, aft end and funnel satisfactory accuracy has been found by including only the after part of the hull in the model. It is concluded that high priority should still be given to verification of predictions by exciter tests on ships. The finite element calculation is, however, considered to be a very useful tool when alternative structural configurations are compared at the design stage. The effort and cost involved should by no means be prohibitive for the type of modelling discussed in this paper.

  • Supplemental Notes:
    • Also available from Engineering Societies Library.
  • Corporate Authors:

    Royal Norwegian Council for Scientific & Indus Res

    Radhusgaten 8, Sentrum
    Oslo,   Norway 
  • Authors:
    • Kavlie, D
    • Aasjord, H
  • Publication Date: 1977

Media Info

  • Features: References;
  • Pagination: p. 2-11
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00177103
  • Record Type: Publication
  • Source Agency: Royal Norwegian Council for Scientific & Indus Res
  • Files: TRIS
  • Created Date: Jun 28 1978 12:00AM