'SPAN' is a computer program for static and dynamic analysis of stiffened plates and grillages. This addendum contains a precis of R630, plus additional information on computing times, control-cards and permissible problem size. It may be regarded as superseding that document for the conversant SPAN user.
A computer code for the static and dynamic analysis of flat plate grillages is described. The code was a finite element displacement method incorporating a geometric stiffness matrix to calculate the response to static, cyclic or transient loads. Natural frequencies and buckling loads can also be calculated. A full input description is given including a simplified data generation facility for regular grillages. Input and output for some representative sample problems ...
The report shows how the complex behavior of the more common type of floating roof may be resolved into discrete problem areas. The analysis assumes static loading, and, on this basis, examines the probability of various collapse mechanisms. Restorative buoyancy effects were established as the primary stabilizing factor when considering overall buckling of the pontoon ring. (Author)
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