.. _phononic-band_gaps_rigid: phononic/band_gaps_rigid.py =========================== **Description** Acoustic band gaps in a strongly heterogeneous elastic body with a rigid inclusion, detected using homogenization techniques. A reference periodic cell contains three domains: the stiff matrix :math:`Y_m` and the soft inclusion :math:`Y_c` enclosing the rigid heavy sub-inclusion :math:`Y_r`. .. image:: /../doc/images/gallery/phononic-band_gaps_rigid-band_gaps_rigid.png .. image:: /../doc/images/gallery/phononic-band_gaps_rigid.png :download:`source code ` .. literalinclude:: /../sfepy/examples/phononic/band_gaps_rigid.py