VS3D4

• Command_Manual
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  • Misc Commands
    • eleResponse Command
    • getTime Command
    • getEleTags Command
    • getNodeTags
    • loadConst Command
    • nodeCoord Command
    • nodeDisp Command
    • nodeVel Command
    • nodeAccel Command
    • nodeEigenvector Command
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    • print Command
    • remove Command
    • reset Command
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    • wipe Command
    • exit Command
  • DataBase Commands
    • Template:DataBaseCommandsMenu

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This command is used to construct a four-node 3D viscous-spring boundary quad element object based on a bilinear isoparametric formulation.

element VS3D4 $eleTag $node1 $node2 $node3 $node4 $E $G $rho $R $alphaN $alphaT

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$eleTag	unique element object tag
$node1 ..$node3	4 end nodes
$E	Young's Modulus of element material
$G	Shear Modulus of element material
$rho	Mass Density of element material
$R	distance from the scattered wave source to the boundary
$alphaN	correction parameter in the normal direction
$alphaT	correction parameter in the tangential direction

Reference: Liu J, Du Y, Du X, et al. 3D viscous-spring artificial boundary in time domain. Earthquake Engineering and Engineering Vibration, 2006, 5(1):93-102

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