Metastructure with integrated internal oscillators of constant, linearly and nonlinearly varying natural frequency

This research focuses on the analysis of model and performance lightweight metastructures encompassing a distributed array internal homogenous oscillators, integrated into host structure to create single-piece element. metastructure performs longitudinal vibrations, whose axis is colinear with direction transverse vibration oscillators. First, mechanical models separate elements as whole are created considered. The first modal frequencies vibrations blocked free oscillators tuned frequency one oscillator, yielding optimal number for this be achieved, which new result proposed design. theoretical then checked experimentally produced by 3D printing technology, comprising different all have same natural frequency. Besides validating results, experimental investigations freely vibrating constant used explore other characteristics, such width regions where reduced amplitude achieved. Finally, based additional numerical modified in two ways, an original approach: their increased linearly nonlinearly along accordance previous results. benefits redesigns multi-modal characteristics discussed.