THE SYMMETRIC GENERALISED FLUID FORCES APPLIED TO A SHIP IN A SEAWAY

As an essential preliminary step in the modal analysis of hull response, generalized hydrodynamic forces corresponding in the Lagrange sense to the principal coordinates of symmetric motion are found. This is done on the basis of strip theory and the generalized forces relating (a) to ship motion and (b) to wave excitation. It is shown that, depending to some extent on which strip theory formulation is used, the coupling of modes by hydrodynamic damping conforms to the Timman and Newman relationship. The applications of this finding in current theories of structural dynamic response are discussed. Order from: BSRA as No. 48,346.

• Corporate Authors:

  Royal Institution of Naval Architects, England

  10 Upper Belgrave Street
  London SW1X 8BQ,   England 
• Authors:
  • Betts, C V
  • Bishop, RED
  • Price, W G
• Publication Date: 1977-7

Media Info

• Features: References;
• Pagination: 8 p.
• Serial:
  • R.I.N.A. Supplementary Papers
  • Volume: 119
  • Publisher: Royal Institution of Naval Architects, England

Subject/Index Terms

• TRT Terms: Dynamic loads; Excitation; Hulls; Hydrodynamic pressure; Modal analysis; Modal split; Ship motion; Structural analysis; Structural mechanics
• Uncontrolled Terms: Dynamic response; Structural response
• Old TRIS Terms: Hull response; Hydrodynamic forces
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00178197
• Record Type: Publication
• Source Agency: British Ship Research Association
• Files: TRIS
• Created Date: Jul 19 1978 12:00AM