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Extensive numerical studies of the dependence of the stress-strain state influence function on corrosion process speed with regard to the stiffness of the optimized structure have been performed. For the optimum design of structures interacting with an aggressive environment, application of the method of repeated identification of mathematical models of corrosion fracture is proposed. Theoretical aspects of the problem are discussed. The procedure of definition of parameters of the mathematical model of the corrosion fracture providing evolutionary transition of the structure into the optimum state is provided. [ABSTRACT FROM AUTHOR]

The paper is concerned with the mass optimization of a smooth cylindrical shell subjected to short-term aperiodic loads in the form of axial compression pulses. The optimization method chosen is random search with controlled limits of optimized parameters. The effect of the pulse duration and the load level on the optimal design is analyzed. The results obtained by two methods are compared [ABSTRACT FROM AUTHOR]