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*CYCLIC SYMMETRY MODEL

Keyword type: model definition

This keyword is used to define the number of sectors and the axis of symmetry in a cylic symmetric structure for use in a cyclic symmetry calculation. It must be preceded by two *SURFACE cards defining the nodes belonging to the left and right boundary of the sector, respectively, and a *TIE card linking those surfaces, in that order. The axis of symmetry is defined by two points a and b, defined in global Carthesian coordinates.

There are two parameters, N and NGRAPH. The parameter N, specifying the number of sectors, is required.

The parameter NGRAPH is optional and indicates for how many sectors the solutions should be stored in .frd format. Setting NGRAPH=N for N sectors stores the solution for the complete structure for subsequent plotting purposes. Default is NGRAPH=1.

First line:

- *CYCLIC SYMMETRY MODEL
- Enter the required parameter N, and its value.

Second line:

- X-coordinate of point a.
- Y-coordinate of point a.
- Z-coordinate of point a.
- X-coordinate of point b.
- Y-coordinate of point b.
- Z-coordinate of point b.

    Example:

    *CYCLIC SYMMETRY MODEL, N=12, NGRAPH=3
    0.,0.,0.,1.,0.,0.

defines a cylic symmetric structure consisting of 30° sectors and axis of symmetry through the points (0.,0.,0.) and (1.,0.,0.). The solution will be stored for three connected sectors (120°).

Example files: segment, fullseg.

Next: *DEFORMATION PLASTICITY Up: Input deck format Previous: *CYCLIC HARDENING Contents