A PARAMETRIC STUDY ON GLOBAL HULL AND SUPERSTRUCTURE VIBRATION ANALYSIS BY MEANS OF THE FINITE-ELEMENT METHOD
This study presents a number of parametric variations on the finite-element modelling of ships for global hull and superstructure vibration analysis. The parameters studied are the effects of double bottom vibration, shear lag in the double bottom, the influence of the hull girder on the fundamental superstructure natural frequency, the effect of load condition, i.e. mass distribution, and the effect of the distribution of propeller-induced hull surface pressure field on the forced vibration level. The lower natural hull frequencies are compared with results by the classical Timoshenko beam and with measurements. A design study is carried out to change the natural frequency of a superstructure. Two ships are studied, a 60,000-dwt bulk carrier and a 12,500-dwt multipurpose carrier. Order from BSRA as No. 50,008.
- R.I.N.A. Paper W4 issued for written discussion, September, 1977.
Royal Institution of Naval Architects, England10 Upper Belgrave Street
London SW1X 8BQ, England
- Carlsen, C A
- Publication Date: 1977-9
- Features: References;
- Pagination: 9 p.
- TRT Terms: Finite element method; Hulls; Measurement; Natural frequency; Propellers; Structural analysis; Superstructures; Vibration
- Uncontrolled Terms: Natural frequencies
- Old TRIS Terms: Hull superstructure interaction; Hull vibration; Propeller induced vibration; Structural vibration; Vibration measurement
- Subject Areas: Design; Marine Transportation;
- Accession Number: 00194218
- Record Type: Publication
- Source Agency: British Ship Research Association
- Report/Paper Numbers: Paper W4
- Files: TRIS
- Created Date: May 26 1979 12:00AM