The cellular structures with which this Report is concerned are steel structures with a system of shear-carrying "webs", together with "plates" which form the top and bottom flanges of the system. The web and flanges normally form a system of closed cells whose torsional stiffness is important. Ships' double bottoms are typical of such structures. In the Report, the Author discusses the analysis and design of these structures under headings which include:--1. Introduction. 2. Existing Linear Analysis Programs. 3. Linear Computer Program for Cellular Structures. 4. Examples of Use: Linear Program for Cellular Structures. 5. Finite Element Models versus Beam Grillage Models. 6. Non-Linear Analysis of Cellular Structures. 6.1 Ultimate Load Design. 6.2 Failure Mechanisms for Cellular Structures. 6.3 Ultimate Load Behaviour of Stiffened Panels. 6.4 System Analysis. 7. Design Examples: Ultimate Strength of Double Bottoms. 7.1 Traditional versus Optimised Designs of Double Bottoms. 7.2 Ultimate Load Carrying Capacity for Alternative Double Bottom Structures. 8. Summary and Suggestion for Further Development. Among the many aspects considered, it is shown that there is a need for "quasi-nonlinear" ultimate-load analyses based on more or less sophisticated theories of the non-linear behaviour of structures. A simplified non-linear procedure for calculating the ultimate load-carrying capacity of cellular structures is described under 6., some examples of its use are presented under 7., and some suggestions for refinements of the method, together with plans to use it in the study of collision and stranding damage, are mentioned under 8. Order from BSRA as No. 53,355.

  • Corporate Authors:

    Norwegian Institute of Technology

    N-7034 Trondheim,   Norway 
  • Authors:
  • Publication Date: 1979-6

Media Info

  • Features: References;
  • Pagination: 165 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00316735
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Report/Paper Numbers: UR-79-02
  • Files: TRIS
  • Created Date: Oct 8 1980 12:00AM