Abstract
An approximate computational algorithm is derived which permits a refined element analysis to be altered on a small capacity computer. The intent of the algorithm is to permit frequent design changes on any small computing machine where the computer cost is low and the machine-designer interaction is essentially instantaneous. The method is based upon the dynamic normal mode method and upon an accompanying solution technique known as ·dynamic relaxation”. Geometric and material alterations, including the effects of material nonlinearities, are permissible design changes within the normal mode approach. The design alteration leads to a system of uncoupled nonlinear equations whose numerical solution is economical in terms of both computing time and core storage.
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