dj

Mapdl.dj(elem='', label='', value='', **kwargs)

Specifies boundary conditions on the components of relative motion of a

APDL Command: DJ joint element.

Parameters
  • elem – Element number or ALL to be specified.

  • label

    Valid labels are:

    UX - Displacement in local x direction.

    UY - Displacement in local y direction.

    UZ - Displacement in local z direction.

    ROTX - Rotation about local x axis.

    ROTY - Rotation about local y axis.

    ROTZ - Rotation about local y axis.

    VELX - Linear velocity in local x direction.

    VELY - Linear velocity in local y direction.

    VELZ - Linear velocity in local z direction.

    OMGX - Angular velocity in local x direction.

    OMGY - Angular velocity in local y direction.

    OMGZ - Angular velocity in local z direction.

    ACCX - Linear acceleration in local x direction.

    ACCY - Linear acceleration in local y direction.

    ACCZ - Linear acceleration in local z direction.

    DMGX - Angular acceleration in local x direction.

    DMGY - Angular acceleration in local y direction.

    DMGZ - Angular acceleration in local z direction.

  • value – Value of the label.

Notes

This command is valid for MPC184 joint elements. See DJDELE for information on deleting boundary conditions applied with the DJ command.

You can apply only one displacement, velocity, or acceleration load at any relative degree of freedom. If multiple loads are specified, the last applied load overrides the previous ones. For example, the following commands apply loads to element 100:

In this case, the velocity load (VELX) applied in the last command will override the displacement load (UX).

Tabular boundary conditions (VALUE = %tabname%) can be used.

%_FIX% is an ANSYS reserved table name. When VALUE is set to %_FIX%, ANSYS will prescribe the degree of freedom to the “current” relative displacement value. This option is only valid for the following labels: UX, UY, UZ, ROTX, ROTY, ROTZ. In most cases, %_FIX% usage is efficient and recommended for all structural degrees of freedom.