GGU-SLAB: Button "Irregular"
In contrast to the regular array procedure, where the generated nodes are evenly spaced within the generated rows, the spacing can be varied using the irregular array. This can be done in the following dialog box.
The array numbers can be defined using the "No. of dx values" and "No. of dy values" buttons. Enter the array spacing in "dx" and "dy". If you press the "Recompute x and y values" button the first column to the left of "dx" and "dy" are recalculated. These are absolute values for the array. The array origin is entered in "x0" and "y0".
If the "Generate new mesh" check box is activated any existing nodes are deleted and a new mesh generated automatically for your newly defined nodes. If the check box remains deactivated existing nodes and the FEM mesh are retained. The new nodes cannot then lie in the same region as the existing FEM mesh. The mesh across the new nodes must then be generated by the user.