.. include:: sub.txt ===== AV3D4 ===== This command is used to construct a four-node 3D acoustic viscous boundary quad element object based on a bilinear isoparametric formulation. .. function:: element('AV3D4', eleTag, *eleNodes, matTag) :noindex: =================================== =========================================================================== ``eleTag`` |int| unique element object tag ``eleNodes`` |listi| 4 end nodes ``matTag`` |int| Material Tag of previously defined nD material =================================== =========================================================================== .. seealso:: `Notes `_