PLASTIC SHAKEDOWN BEHAVIOR OF SHIP FRAMES AND PANELS

The shakedown plastic behavior of ship frames, grillages and panels is the main purpose of this investigation. Before that, limit analysis for simplified and actual ship frames is performed. The influence of longitudinal members and of axial and shear forces is included in this analysis. A simplified method is developed here for the limit analysis of grillages under certain conditions of geometry and load. The shakedown plastic behavior of actual ship frames is examined. A simple method, which gives bounds for the shakedown load and in many cases the exact shakedown load is developed. The method gives the exact shakedown load for all the examined frames. The influence of longitudinal members is included in the shakedown analysis. The influence of axial and shear forces is approximately also included. The above method is modified for the shakedown analysis of plates. The shakedown behavior of circular and rectangular plates under uniform pressure on both sides is examined and nondimensional curves for rectangular plates are plotted. The Melan's shakedown theorem is extended to a continuum with large deformation and small strain. The shakedown behavior in large deflection of rectangular clamped plates with aspect ratio 1.5, of square clamped plates and of infinite clamped rectangular plates, under uniform pressure on both sides, is examined, and nondimensional curves useful for design purposes are plotted. Discussion and recommendations for related studies are included.

  • Corporate Authors:

    Massachusetts Institute of Technology

    Department of Ocean Engineering, 77 Massachusetts Avenue
    Cambridge, MA  United States  02139
  • Authors:
    • Boufounos, T P
  • Publication Date: 1975-2

Media Info

  • Pagination: 2 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00097505
  • Record Type: Publication
  • Source Agency: Massachusetts Institute of Technology
  • Report/Paper Numbers: PhD Thesis
  • Files: TRIS
  • Created Date: Jul 24 1975 12:00AM