| Author(s): |
Beli, D.
;
Fabro, A. T.
;
Ruzzene, M.
;
Arruda, J. R. F.
;
Sas, P
;
Moens, D
;
VanDeWalle, A
Total Authors: 7
|
| Document type: | Journal article |
| Source: | PROCEEDINGS OF ISMA2016 INTERNATIONAL CONFERENCE ON NOISE AND VIBRATION ENGINEERING AND USD2016 INTERNATIONAL CONFERENCE ON UNCERTAINTY IN STRUCTURAL DYNAMICS; v. N/A, p. 13-pg., 2016-01-01. |
| Abstract | |
Vibration and acoustic isolation by passive control methods have been extensively studied along the years. In a recent past, phononic crystals and acoustic metamaterials have also been employed for this purpose. These periodic structures present band gaps, which are used herein to reduce vibration and acoustic radiation of panels. However, variability in the manufacturing process causes material and geometry uncertainties that affect their band gap robustness and consequently their dynamic attenuation performance. In this work, the robustness of the band gap phenomenon in vibroacoustic panels is investigated by employing the WFE method together to WKB approximation and KL expansion. A two-dimensional analysis where the panel is represented by either a phononic undulated beam or a metamaterial straight beam with distributed resonators is performed. Spatial correlated variability of the elastic modulus and resonator stiffness is considered. Band gap of both panels are shown to be robust with respect to this variability. However, vibration and acoustic attenuation are reduced. (AU) | |
| FAPESP's process: | 15/15718-0 - Dynamic Behavior of Beam and Plate Metamaterials with Fluid-Structure Interaction |
| Grantee: | Danilo Beli |
| Support Opportunities: | Scholarships abroad - Research Internship - Doctorate |
| FAPESP's process: | 14/19054-6 - Design of periodic structures with application to phononic crystals and acoustic metamaterials |
| Grantee: | Danilo Beli |
| Support Opportunities: | Scholarships in Brazil - Doctorate |