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*GEOMETRIC TOLERANCES

Keyword type: step

This option allows the specification of the geometric tolerances in a
*ROBUST DESIGN analysis. It can be defined on a
node-by-node basis and consists of a mean value and a standard deviation, both
in length units. In a robust design analysis random field vectors are
generated representing the geometric tolerances up to a specified accuracy.

There is one required parameter TYPE=NORMAL and there is one optional
parameter CONSTRAINED. TYPE=NORMAL specifies that the
tolerances are normally distributed. Right now, this is the only distribution
allowed. The CONSTRAINED parameter enforces a smooth
transition between those parts in the structure for which tolerances were
defined and the remaining parts.

First line:

- *GEOMETRIC TOLERANCES
- Enter any needed parameters and their value

Second line:

- Node number or node set label.
- Mean value of the tolerance.
- Standard deviation of the tolerance.

Repeat this line if needed.

Example:
*GEOMETRIC TOLERANCES,TYPE=NORMAL,CONSTRAINED
N1,1.5,3.7

assigns normally distributed tolerances with a mean value of 1.5 length units
and a standard deviation of 3.7 length units to all nodes in set N1. The
random fields are constrained, i.e. a smooth transition of the random field
vectors is requested between the nodes in set N1 and the remaining nodes in
the structure.

Example files: beamprand.