STRESS, STABILITY AND VIBRATION OF COMPLEX, BRANCHED SHELLS OF REVOLUTION

Abstract A comprehensive computer program, designated BOSOR4, for analysis of the stress, stability and vibration of segmented, ring-stiffened, branched shells of revolution and prismatic shells and panels is described. The program performs large-deflection axisymmetric stress analysis, small-deflection nonsymmetric stress analysis, modal vibration analysis with axisymmetric nonlinear prestress included, and buckling analysis with axisymmetric or nonsymmetric prestress. One of the main advantages of the code is the provision for realistic engineering details such as eccentric load paths, internal supports, arbitrary branching conditions, and a ‘library’ of wall constructions. The program is based on the finite-difference energy method which is very rapidly convergent with increasing numbers of mesh points. The organization of the program is briefly described with flow of calculations charted for each of the types of analysis. Overlay charts and core storage requirements are given for the CDC 6600, IBM 370/165, and UNTVAC 1108 versions of BOSOR4. A large number of cases is included to demonstrate the scope and practicality of the program period.

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