A RAPID TECHNIQUE FOR PREDICTING THE GENERAL INSTABILITY OF SHIP GRILLAGES WITH ELASTICALLY CONSTRAINED EDGES

An explicit discrete beam solution based on the energy approach has been developed for simply and rapidly estimating the loading required to cause general instability of rectangular, cross-stiffened, flat-plated grillages whose edges are elastically restrained against rotation. A method for treating elastic effects is presented both for materials which exhibit flat yieldtype behavior and for those which show more pronounced strain hardening. Selected comparisons with more exact matrix methods indicate that in most cases, the accuracy of predicted elastic buckling loads can be expected to be within about 10 percent. Only when the number of transverse and/or longitudinal stiffeners is small and all four edges are highly restrained does there appear to be the possibility of larger discrepancies. Although this method is intended primarily for automated structural synthesis schemes, plots of selected coefficients are appended to allow its ready use in manual analysis and design calculations.

  • Corporate Authors:

    Naval Ship Research and Development Center

    Bethesda, MD  USA  20034
  • Authors:
    • Adamchak, J C
  • Publication Date: 1975-2

Media Info

  • Pagination: 92 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00095335
  • Record Type: Publication
  • Source Agency: Naval Sea Systems Command
  • Report/Paper Numbers: #4604
  • Files: TRIS
  • Created Date: May 29 1975 12:00AM