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

•A meta-beam with periodically attached inertial amplified resonators was designed.•The frequency bandgap is effectively reduced under the influence of inertial amplified resonators.•The high adjustability of frequency bandgap is obtained in the resonator designed.•The parameters of the structure are reasonably designed to accomplish bandgap merge and the broadening frequency bandgap. 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.