7.2 Linear pyramid acoustic element
Benefits: The pyramid element is useful to transition between brick elements and tetrahedra elements during mesh generation.
Description: Acoustic elements are provided in Abaqus/Standard for modeling acoustic domain in a purely acoustic analysis or in a coupled acoustic-structural analysis. The new 5-node pyramid element AC3D5 supports all of the loadings, material behaviors, and boundary conditions supported by the existing acoustic elements.
References:
Abaqus Analysis User's Guide
Abaqus Verification Guide
“Eigenvalue extraction for single unconstrained elements,” Section 1.2.1
“Acoustic modes,” Section 1.2.3
“Patch test for acoustic elements,” Section 1.5.10
“Analysis of unbounded acoustic regions,” Section 1.11.8
“Acoustic submodeling,” Section 3.8.14
“Volumetric drag,” Section 3.9.1
“Impedance boundary conditions,” Section 3.9.2
“Transient acoustic wave propagation,” Section 3.9.3
“Acoustic model change: steady state,” Section 3.10.8
“Surface-based tie constraint,” Section 5.1.27
