perbc2d

SpecialPurpose.perbc2d(loc1='', loc2='', loctol='', r1='', r2='', tolr='', opt='', plnopt='', **kwargs)

Generates periodic constraints for 2D planar magnetic field analyses.

Mechanical APDL Command: PERBC2D

Parameters:

loc1str

Constant coordinate location of the first plane of nodes. For PLNOPT = 1 or 2, the constant coordinate location is the global Cartesian coordinate system ( csys,0) location in the X or Y direction respectively. For PLNOPT = 0, the location is the angle in the global cylindrical coordinate system ( csys,1).

loc2str

Constant coordinate location of the second plane of nodes. For PLNOPT = 1 or 2, the constant coordinate location is the global Cartesian coordinate system ( csys,0) location in the X or Y direction respectively. For PLNOPT = 0, the location is the angle (in degrees) in the global cylindrical coordinate system ( csys,1).

loctolstr

Tolerance on the constant coordinate location for node selection. Defaults to.00001 for PLNOPT = 1 or 2 and.001 degrees for PLNOPT = 0.

r1str

Minimum coordinate location along the second plane of nodes. For PLNOPT = 1 or 2, the coordinate location is the global Cartesian coordinate system location in the Y or X direction respectively. For PLNOPT = 0, the coordinate location is the radial coordinate value in the global cylindrical coordinate system. Periodic conditions are not applied to nodes at this location.

r2str

Maximum coordinate location along the second plane of nodes. For PLNOPT = 1 or 2, the coordinate location is the global Cartesian coordinate system location in the Y or X direction respectively. For PLNOPT = 0, the coordinate location is the radial coordinate value in the global cylindrical coordinate system. Periodic conditions are not applied to nodes at this location.

tolrstr

Tolerance dimension on node selection along the plane of nodes. Defaults to.00001.

optint or str

Periodic option:

• 0 - Odd symmetry (default). Apply constraint equations such that AZ(i) = -AZ(j).

• 1 - Even symmetry. Apply node coupling such that AZ(i) = AZ(j).

plnoptint or str

Symmetry plane option:

• 0 - Planes of constant angle in the global cylindrical coordinate system ( csys,1).

• 1 - Planes parallel to the global Cartesian X axis ( csys,0).

• 2 - Planes parallel to the global Cartesian Y axis ( csys,0).

Notes

perbc2d invokes a Mechanical APDL macro which generates periodic boundary condition constraints for 2D planar magnetic field analysis.

The macro is restricted to node pairs sharing common coordinate values along symmetry planes separated by a constant coordinate value. Planes (or lines) must lie at either constant angles ( PLNOPT = 0), constant X values ( PLNOPT = 1), or constant Y values ( PLNOPT = 2).

The macro applies constraint equations ( OPT = 0, odd symmetry) or node coupling ( OPT = 1, even symmetry) to each node pair sharing a common coordinate value along the symmetry planes. By default, periodic conditions are not applied at the first and last node pairs on the symmetry planes unless the input location values, R1 and R2, are adjusted to be less than or greater than the actual node coordinate values.

Nodes are selected for application of constraints via nsel, with tolerances on the constant coordinate location ( LOCTOL ) and the coordinate location along the plane (RTOL).