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A general approach for minimizing radiated acoustic power of a baffled plate excited by broad band harmonic excitation is given. The steps involve a finite element discretization for expressing acoustic power and vibration analysis, analytical design sensitivity analysis, and use of gradient-based optimization algorithms. Applications to rectangular plates and an engine cover plate are presented. Thicknesses are chosen as design variables.

Residual stresses are produced in laminated ceramic composites when they are cooled from elevated processing temperatures. An optimization approach is described to minimize these stresses. The optimization problem is formulated considering wear resistance, fracture toughness and delamination in the laminate. Several examples are solved to illustrate the approach.