TY - DATA
T1 - MATLAB script and COMSOL models of the article "An efficient multiscale method for subwavelength transient analysis of acoustic metamaterials"
PY - 2024/04/24
AU - Renan Liupekevicius Carnielli
AU - Johannes van Dommelen
AU - Marc Geers
AU - Varvara Kouznetsova
UR - 
DO - 10.4121/0c31cd57-7ea1-4587-84e7-b9b75ff5fa2e.v2
KW - Locally resonant acoustic metamaterials
KW - Homogenisation
KW - Equivalent fluid model
KW - Micromorphic enriched continuum
N2 - <p>A reduced-order homogenisation framework is proposed in the article "An efficient multiscale method for subwavelength transient analysis of acoustic metamaterials", providing a macro-scale enriched continuum model for locally resonant acoustic metamaterials operating in the subwavelength regime, for both time and frequency domain analyses. The homogenised continuum has a non-standard constitutive model, capturing a metamaterial behaviour such as negative effective bulk modulus, negative effective density, and Willis coupling. A suitable reduced space is constructed based on the unit cell response in a steady state regime and the local resonance regime.</p><p><br></p><p>- The effective continuum material properties are computed via the MATLAB script provided here.</p><p><br></p><p>-A&nbsp;frequency domain numerical example demonstrates the efficiency and suitability of the proposed framework. The macro-scale model is implemented via a COMSOL model provided here.</p><p><br></p><p>-The direct numerical simulations (COMSOL models) are also provided here.</p>
ER -