Proceedings of the 27th International Conference on Noise and Vibration Engineering (ISMA 2016)
International Conference on Noise and Vibration Engineering (ISMA) edition:27 location:Leuven date:19-21 September 2016
Recently, locally resonant metamaterials come to the fore in noise and vibration control engineering, showing great potential due to their superior noise and vibration attenuation possibilities. As damping has an important influence on the performance of these materials, unit cell models for wave propagation in infinite periodic structures have been developed in previous work, allowing various damping mechanisms. The obtained dispersion curves for locally resonant metamaterials with damping were shown to agree well with earlier findings and measurements. In this paper, the numerically obtained dispersion curves for a locally resonant metamaterial design are compared with experimental dispersion curve measurements using Scanning Laser Doppler Vibrometry, on a metamaterial plate manufactured at a representative scale. Good agreement is obtained between the predicted and measured dispersion curves.