PROPELLER AND WAVE-INDUCED HULL STRUCTURE VIBRATIONS

The American Bureau of Shipping has investigated propeller-induced and wave-induced hull structure vibrations on many types of vessels to ensure compliance with strength standards and specified habitability criteria. This paper illustrates some large-scale vibration analyses performed with the aid of finite element computer models representing entire vessels. The analyses provide detailed information on frequencies and response of deckhouses, shafting and other critical areas to propeller-induced forces. Modeling techniques, together with their application and influence on results, are discussed. The paper also describes the vibratory response of ship hulls to the excitation of irregular wave loads. This phenomenon includes the so-called "springing" coupled with the wave-induced bending moment in a random process which can be represented mathematically with a flexible beam model. Correlation between calculated results and data from full-scale measurements is presented and evaluated. Some of the potential problems caused by vibrations are discussed, together with proposed feasible solutions.

  • Supplemental Notes:
    • Presented at the Ship Vibration Symposium sponsored by The Ship Structure Committee and The Society of Naval Architects and Marine Engineers, Arlington, Virginia, October 16-17, 1978.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  USA  07306-2907
  • Authors:
    • Stiansen, S G
  • Publication Date: 1978

Media Info

  • Features: References;
  • Pagination: 24 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00183166
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Oct 31 1978 12:00AM