3.1.10.90. AV3D4 Element

This command constructs a four-node quadrilateral acoustic absorbing-transmitting boundary element for fluid domain edges in dam-reservoir analysis. The element requires an AcousticMedium ND material. Use with -ndm 3 -ndf 1 on fluid boundary nodes.

element AV3D4 $eleTag $iNode $jNode $kNode $lNode $matTag

Argument

Type

Description

$eleTag

integer

unique element tag

$iNode $jNode $kNode $lNode

integer

four boundary nodes in counter-clockwise order

$matTag

integer

tag of a previously defined AcousticMedium material

Note

  1. Define the acoustic material first: nDMaterial AcousticMedium $matTag $K $rho <$gamma>.

  2. For solid-side absorbing boundaries see VS3D4 Element. For interior fluid elements see AC3D8 Element.

  3. Valid Element Recorder queries include force and stiffness.

Example

  1. Tcl Code

nDMaterial AcousticMedium 1 2.2e9 1000.0
element AV3D4 1 1 2 3 4 1

  1. Python Code

nDMaterial('AcousticMedium', 1, 2.2e9, 1000.0)
element('AV3D4', 1, 1, 2, 3, 4, 1)

Code developed by: Quan Gu, Yichao Gao, and Zhijian Qiu, Xiamen University