HULL AND SUPERSTRUCTURE VIBRATIONS - DESIGN CALCULATIONS BY FINITE ELEMENTS

Vibration experienced in the afterbody of ships is often the cause of annoyance to the crew members, operational problems for the machinery and fatigue in the structures. To obtain a low vibration level, both the excitation forces and the the dynamic response are of importance. A relatively simple analytical procedure for prediction of dynamic response of the hull and particularly the superstructure is presented. The procedure is based on the finite element method. Application of the procedure is illustrated by few numerical examples. These examples show how it is possible to avoid unfavorable resonant points, changing the dynamic stiffness by selecting a proper propeller blade frequency. The accuracy of the procedure has been checked by a correlation analysis with measurements. /Author/

  • Supplemental Notes:
    • Read at the symposium on High Power Propulsion of Large Ships, Wageninen, December, 1974.
  • Authors:
    • Hansen, H R
    • Skaar, K T
  • Publication Date: 1975-1

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Filing Info

  • Accession Number: 00097527
  • Record Type: Publication
  • Source Agency: National Maritime Research Center, Kings Point
  • Files: TRIS
  • Created Date: Jul 24 1975 12:00AM