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*TRANSFORM

Keyword type: model definition

This option may be used to specify a local axis system X'-Y'-Z' to be used for defining SPC's, MPC's and nodal forces. For now, rectangular and cylindrical systems can be defined, triggered by the parameter TYPE=R (default) and TYPE=C.

A rectangular system is defined by specifying a point a on the local X' axis and a point b belonging to the X'-Y' plane but not on the X' axis. A right hand system is assumed (Figure 118).

Figure 118: Definition of a rectangular coordinate system
\begin{figure}\epsfig{file=Rect.eps,width=10cm}\end{figure}

When using a cylindrical system two points a and b on the axis must be given. The X' axis is in radial direction, the Z' axis in axial direction from point a to point b, and Y' is in tangential direction such that X'-Y'-Z' is a right hand system (Figure 119).

Figure 119: Definition of a cylindrical coordinate system
\begin{figure}\epsfig{file=Cyl.eps,width=10cm}\end{figure}

The parameter NSET, specifying the node set for which the transformation applies, is required.

If several transformations are defined for one and the same node, the last transformation takes effect.


First line:

Second line:

Example:

*TRANSFORM,NSET=No1,TYPE=R
0.,1.,0.,0.,0.,1.

assigns a new rectangular coordinate system to the nodes belonging to (node) set No1. The x- and the y-axes in the local system are the y- and z-axes in the global system.


Example files: segment1, segment2, segmentf, segmentm.


next up previous contents
Next: *UNCOUPLED TEMPERATURE-DISPLACEMENT Up: Input deck format Previous: *TIME POINTS   Contents
guido dhondt 2012-10-06