GUIDELINES FOR PREVENTION OF EXCESSIVE SHIP VIBRATION

The aim of this paper is to guide the naval architect through a vibration check procedure for his design in order to avoid harmful vibration when the ship enters service. Efforts have been made to give a description of when to do what at the various stages of a ship design and how to do it by the use of simple equations and empirical formulas. Just a necessary minimum of investigations is suggested and the results are evaluated at each step of procedure. The guide is supplied with a short introduction to the various items to be investigated to make the designer qualified to take the first decisions in the evaluation process without assistance from vibration experts. Additional costly and time-consuming calculations are recommended only when the preliminary investigations have revealed that serious vibration problems may occur or that the margins are small. According to experience, such problems are mainly related to the pressure impulses from the cavitating propeller(s) and the dynamic response of the afterbody. Finally, the use of the procedure is illustrated with examples, including one case where both improved propeller design and response calculations with the finite-element method had to be carried out at the final design stage.

  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Johannessen, H
    • Skaar, K T
  • Publication Date: 1980

Media Info

  • Features: References;
  • Pagination: 31 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00323484
  • Record Type: Publication
  • Report/Paper Numbers: No. 11
  • Files: TRIS
  • Created Date: Feb 18 1981 12:00AM