ansys.mapdl.core.Mapdl.dl#

Mapdl.dl(line='', area='', lab='', value1='', value2='', **kwargs)#

Defines DOF constraints on lines.

Mechanical APDL Command: DL

Parameters:
linestr

Line at which constraints are to be specified. If ALL, apply to all selected lines ( lsel ). If LINE = P, graphical picking is enabled and all remaining command fields are ignored (valid only in the GUI). A component name may also be substituted for LINE.

areastr

Area containing line. The normal to the symmetry or antisymmetry surface is assumed to lie on this area. Defaults to the lowest numbered selected area containing the line number.

labstr

Symmetry label (see DL_LabFootnotes_1 below) :

  • SYMM - Generate symmetry constraints.

  • ASYM - Generate antisymmetry constraints.

Mechanical APDL degree-of-freedom labels:

  • UX - Displacement in X direction.

  • UY - Displacement in Y direction.

  • UZ - Displacement in Z direction.

  • ROTX - Rotation about X axis.

  • ROTY - Rotation about Y axis.

  • ROTZ - Rotation about Z axis.

  • HDSP - Hydrostatic pressure.

  • WARP - Warping magnitude.

  • TEMP, TBOT, TE2, TE3, ..., TTOP - Temperature

  • VOLT - Electric scalar potential (see DL_LabFootnotes_2 ).

  • AZ - Magnetic vector potential in Z direction.

  • CONC - Concentration.

  • ALL - Applies all appropriate DOF labels except HDSP.

This command contains some tables and extra information which can be inspected in the original documentation pointed above.

value1str

Value of DOF (real part) or table name reference on the line. Valid for all DOF labels. To specify a table, enclose the table name in % signs (for example, dl, LINE, AREA,TEMP,``tabname``). Use the dim command to define a table.

value2str

For VOLT DOFs:

Actual value of the imaginary component of the degree of freedom.

Notes

You can transfer constraints from lines to nodes with the dtran or sbctran commands. See the dk command for information about generating other constraints at lines.

Tabular boundary conditions ( Value1 = tabname) are available only for the following degree of freedom labels: Electric (VOLT), Structural (UX, UY, UZ, ROTX, ROTY, ROTZ), Acoustic (PRES, UX, UY, UZ), and temperature (TEMP, TBOT, TE2, TE3,…, TTOP).

Constraints specified with this command can conflict with other specified constraints. For more information, see Resolution of Conflicting Constraint Specifications.

This command is also valid in PREP7.