Elastic‐Invisibility‐Enabled Metastructure With Mechanically Programmed Nonlinear Resonators for Vibration Attenuation and Energy Harvesting

ABSTRACT Mechanical programming provides a simple way to tune embedded nonlinear resonators without redesigning the host structure. Here, seven magneto‐elastic piezoelectric resonators are integrated into elastically reconstructed openings of a host beam. The removed stiffness, mass, and inertia are restored. The dynamics of the intact beam are therefore recovered over the investigated frequency range. Programming is performed by changing only the spacing between repulsive magnets. Each resonator can be set independently. This creates uniform, nonuniform, and graded combinations of monostable and bistable states. Experiments and simulations show marked changes in both vibration attenuation and harvested power. Different programs favor different functions. One configuration reaches 1.82 times the reference attenuation bandwidth. Another reaches 1.57 times the reference harvesting performance. Assuming nine admissible states per resonator, the seven‐resonator system spans possible configurations. Model‐selected candidates improve both numerical references simultaneously, reaching 1.16 times the attenuation bandwidth and 1.11 times the harvesting metric. The prototype also delivers up to 10.67 of total AC load power near resonance. The result is a structurally integrated platform with programmable nonlinear functionality and largely preserved host dynamics.