Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1867099 | Physics Letters A | 2012 | 7 Pages |
The plane wave expansion method is extended to study the flexural wave propagation in locally resonant beams with multiple periodic arrays of attached spring-mass resonators. Complex Bloch wave vectors are calculated to quantify the wave attenuation performance of band gaps. It is shown that a locally resonant beam with multiple arrays of damped resonators can achieve much broader band gaps, at frequencies both below and around the Bragg condition, than a locally resonant beam with only a single array of resonators, although the two systems have the same total resonator masses.
► Locally resonant beams with multiple periodic arrays of damped resonators. ► Complex band structure calculated by the plane wave expansion method. ► Coexistence of broad low-frequency and higher-frequency band gaps.