Adjustable low-frequency bandgap of flexural wave in an Euler-Bernoulli meta-beam with inertial amplified resonators

In order to suppress the low-frequency flexural wave propagation, an Euler-Bernoulli meta-beam with periodically attached inertial amplified resonators was designed. The bandgap characteristics of the meta-beam with inertial amplified resonators were analyzed by the transfer matrix method. An adjustable low-frequency bandgap is obtained by the dynamic design of lever. Corresponding simulations were carried out. Results show that, the frequency bandgap of the meta-beam with inertial amplified resonators is much lower and wider than that with spring-mass resonators of equal mass. In addition, an adjustability of the frequency bandgap is easily achieved. This study provides guidance for the suppression of flexural waves. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

A novel Meta-beam structure was designed to suppress the propagation of low-frequency flexural waves by using periodically attached inertial amplified resonators, with an adjustable low-frequency bandgap achieved through dynamic lever design. Simulation results showed that the frequency bandgap of the Meta-beam with inertial amplified resonators is lower and wider than traditional structures, with easy adjustability.