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, *eleNodes, E, G, rho, R, alphaN, alphaT)

eleTag (int)

unique element object tag

eleNodes (list (int))

4 end nodes

E (float)

Young’s Modulus of element material

G (float)

Shear Modulus of element material

rho (float)

Mass Density of element material

R (float)

distance from the scattered wave source to the boundary

alphaN (float)

correction parameter in the normal direction

alphaT (float)

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

See also