Abstract
An algorithm is developed for dynamic response analysis and design sensitivity analysis of nonlinear structure systems including the effects of viscosity. The formulation of dynamic response and design sensitivity analysis with nonlinear attributes is derived using incremental finite element theory. Based on this theory, proper numerical procedures and strategies have been developed for implementation into a personal computer program code. The optimum results for a practical engineering application are given and the optimum designs with linear and geometric nonlinear structure response for spring, damping, and beam elements are compared. Finally, the optimum results show that the algorithm presented here gives accurate and stable solutions compared with the experimental measurements.
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