Investigation on broadband vibration suppression by parameter detuning of a metamaterial plate

Abstract

Recent years have witnessed increasing research interest in metamaterials for vibration and noise control, with broadband vibration suppression being particularly sought after. This study proposes an analytical approach for achieving broadband vibration attenuation through parameter detuning of metamaterial plates. Through modal-based homogenization, energy method, and finite element validation, the effects of parameter detuning are quantitatively studied to obtain a vibration suppression scheme of metamaterial plates under Gaussian distribution. The plate’s average vibration response serves as a metric for evaluating suppression effectiveness across multiple samples. Results show while detuning reduces distinct band gap effect, it enables vibration suppression over a wider frequency range. Since parameter detuning naturally occurs in real manufacturing processes, considering it in the design is crucial for achieving effective broadband vibration control in practical applications.