fk

Mapdl.fk(kpoi='', lab='', value='', value2='', **kwargs)

Defines force loads at keypoints.

APDL Command: FK

Parameters
  • kpoi – Keypoint at which force is to be specified. If ALL, apply to all selected keypoints [KSEL]. If KPOI = 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 KPOI.

  • lab – Valid force label. Structural labels: FX, FY, or FZ (forces); MX, MY, or MZ (moments). Thermal labels: HEAT, HBOT, HE2, HE3, …, HTOP (heat flow). Fluid labels: FLOW (fluid flow). Electric labels: AMPS (current flow), CHRG (electric charge). Magnetic labels: FLUX (magnetic flux); CSGX, CSGY, or CSGZ (magnetic current segments). Diffusion labels: RATE (diffusion flow rate).

  • value – Force value or table name reference for specifying tabular boundary conditions. To specify a table, enclose the table name in percent signs (%), e.g., FK, KPOI, HEAT,%tabname%). Use the *DIM command to define a table.

  • value2 – Second force value (if any). If the analysis type and the force allow a complex input, VALUE (above) is the real component and VALUE2 is the imaginary component.

Notes

Forces may be transferred from keypoints to nodes with the FTRAN or SBCTRAN commands. See the F command for a description of force loads.

Tabular boundary conditions (VALUE = %tabname%) are available only for the following labels: Fluid (FLOW), Electric (AMPS), Structural force (FX, FY, FZ, MX, MY, MZ), and Thermal (HEAT, HBOT, HE2, HE3, …, HTOP).

This command is also valid in PREP7.