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fixX Command

This command is used to construct multiple homogeneous single-point boundary constraints for all nodes whose x-coordinate lies within a specified distance from a specified coordinate.

fixX $xCoordinate (ndf $ConstrValues) <-tol $tol>

For example, this command is used when specifying boundary conditions for a series of nodes lying in a plane parallel to the y-z plane in global coordinates.

$xCoordinate

x-coordinate of nodes to be constrained

$ConstrValues

constraint type (0 or 1). ndf values are specified, corresponding to the ndf degrees-of-freedom.

The two constraint types are:

 

0

unconstrained

 

1

constrained

$tol

user-defined tolerance (optional, default = 1e-10)

EXAMPLE:

fixX 0.0 1 1 1 1 1 1 -tol 0.1; # fully restrain all nodes in y-z plane at origin (x=0.0)

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