A Digital Computer Study of the Buckling of Actual Imperfect Cylinders - A Modification of the Computer Program SATANS - Theory and User's Manual of SATANS-I and SATANS-II

摘要

A digital computer program for the geometrically nonlinear static and dynamic response of arbitrarily loaded shells of revolution known as SATANS is modified, removing a requirement that the applied loads be symmetric about a datum meridional plane. The ability to include arbitrary naturally-occurring initial geometric imperfections of any shape, location or extent is added to the program. Two specific axially loaded circular cylinders are analyzed using actual initial imperfections. Detailed numerical studies are conducted to determine the buckling loads of the perfect and imperfect cylinders. Several sets of boundary conditions are considered. An analysis procedure for imperfect shells is proposed. The results indicate that a means to conduct a numerical analysis of an arbitrarily imperfect shell of revolution has been developed. A study of the buckling behavior of the clamped shallow spherical cap modelled under various boundary conditions at the pole is included as an addendum. SATANS-I and SATANS-II were written in FORTRAN for IBM 360/67 computers with OS/MVT. The report includes source program listings. (Author)