ddele

Mapdl.ddele(node='', lab='', nend='', ninc='', rkey='', **kwargs)

Deletes degree-of-freedom constraints.

APDL Command: DDELE

Parameters
  • node – Node for which constraint is to be deleted. If ALL, NEND and NINC are ignored and constraints for all selected nodes [NSEL] are deleted. If NODE = 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 NODE.

  • lab – Valid degree of freedom label. If ALL, use all selected labels [DOFSEL]. Structural labels: UX, UY, or UZ (displacements); ROTX, ROTY, or ROTZ (rotations); WARP (warping). Thermal labels: TEMP, TBOT, TE2, TE3, …, TTOP (temperature). Acoustic labels: PRES (pressure); UX, UY, or UZ (displacements for FSI coupled elements). Electric label: VOLT (voltage). Magnetic labels: MAG (scalar magnetic potential); AX, AY, or AZ (vector magnetic potentials). Diffusion label: CONC (concentration).

  • nend – Delete constraints from NODE to NEND (defaults to NODE) in steps of NINC (defaults to 1).

  • ninc – Delete constraints from NODE to NEND (defaults to NODE) in steps of NINC (defaults to 1).

  • rkey

    Ramping key:

    OFF - Loads are step-removed (default).

    ON or FORCE - Forces on the specified degrees of freedom (Lab) are ramped during the next

    load step. The forces are ramped from the reaction forces of the previous load step, regardless of whether or not a constraint was present. If the specified node(s) and degree(s) of freedom has a force value currently defined, the force is ramped from the reaction force value to the currently applied force value. If no force is currently applied, the force is ramped from the reaction force value to zero.

Notes

Deleting a constraint is not the same as setting it to zero (which “fixes” the degree of freedom to a zero value). Deleting a constraint has the same effect as deactivating, releasing, or setting the constraint “free.” The node and the degree of freedom label must be selected [NSEL, DOFSEL].

This command is also valid in PREP7.