Optimization of Energy Harvesting from a Nonlinear Energy Sink

Simultaneous vibration absorption and energy harvesting (EH) from a tuned mass damper and a variant of nonlinear energy sink (NES) with linear and nonlinear stiffness elements subjected to harmonic excitation and random excitation respectively are considered. Response statistics of the vibrating system and EH mechanism are obtained by the equivalent linearization method. Multi-objective optimization with a dynamic weighted aggregation (DWA) technique is adopted to obtain optimum design parameters with the twin objectives of vibration control and EH. The particle swarm optimization algorithm is adopted to obtain the 2-D Pareto optimal fronts.