REFINEMENTS IN THE APPROXIMATE ANALYSIS OF WEB-STIFFENED SANDWICH STRUCTURES

The first reported exploration of possible use of rib-cored sandwich structures in marine applications was carried out at the Naval Ship Research and Development Center. Measurements from the NSRDCs experiments indicate that web-stiffened sandwich structures in the form of cylindrical shells ( and, by implication, flat plates and beams ) are among the most efficient ones tested, possessing high stiffness-to-weight ratios. Presented in this work is a method of construction of approximate functions in connection with the energy formulation of certain eigenvalue problems of web-stiffened sandwich structures. The construction is based upon the method of Young togeth with a group of fundamental functions deduced from Timoshenkos flexural equations for elastic beams. The analysis is exemplified and numerically tested by the eigenvalue problems of free vibrations and of one-dimensional sandwich structures. Results indicate that the present method possesses marked advantages over similar constructions oriented from the classical flexural normal modes of Bernoulli-Euler.

  • Corporate Authors:

    Polytechnic Institute of Brooklyn

    333 Jay Street
    Brooklyn, NY  USA  11201

    Office of Naval Research

    Department of the Navy, 800 North Quincy Street
    Arlington, VA  USA  22217
  • Authors:
    • Chenn, Youl-Nan
    • Cicero, Frank
    • Kempner, Joseph
  • Publication Date: 1970-11

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 61 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00010202
  • Record Type: Publication
  • Report/Paper Numbers: PIBAL Rpt No 70-45 R&D Rpt
  • Contract Numbers: N00014-67A-0438-0007
  • Files: TRIS
  • Created Date: Feb 25 1971 12:00AM