ansys 指令RIGIDansys 指令RIGID
RIGID, Dof1, Dof2, Dof3, Dof4, Dof5, Dof6 — Specifies known rigid
body modes (if any) of the model.
SOLUTION:Dynamic Options
MP ME ST PR PP ED
Dof1, Dof2, Dof3, Dof4, Dof5, Dof6
Up to six global Cartesian directions of the rigid modes. For ...
ansys 指令RIGID
RIGID, Dof1, Dof2, Dof3, Dof4, Dof5, Dof6 — Specifies known rigid
body modes (if any) of the model.
SOLUTION:Dynamic Options
MP ME ST PR PP ED
Dof1, Dof2, Dof3, Dof4, Dof5, Dof6
Up to six global Cartesian directions of the rigid modes. For a
completely free 2-D model, use ALL or UX, UY, ROTZ. For a
completely free 3-D model, use ALL or UX, UY, UZ, ROTX,
ROTY, ROTZ. For a constrained model, use UX, UY, UZ, ROTX,
ROTY, or ROTZ, as appropriate, to specify each and every
unconstrained direction which exists in the model (not specifying
every direction may cause difficulties in extracting the modes). Use
NONE to force the subspace iteration calculation of all rigid body
modes. If the structure has no constraints, the label ALL is
assumed (unless substructures are present).
Command Default
Any rigid body modes are calculated via subspace iteration. Notes
Specifies known rigid body modes (if any) of the model. Applies only to modal analyses with subspace iteration [MODOPT,SUBSP]. Rigid body
modes specified to the program with this command are not calculated via subspace iteration, resulting in a faster solution. Any rigid body modes specified must be permitted by the applied displacement constraints (i.e., do not specify a rigid body mode in a constrained direction). Reissue the command to redefine the specification. If used in SOLUTION, this command is valid only within the first load step.
This command is also valid in PREP7.
Menu Paths
See RIGID Menu Paths in the ANSYS Command Menu Path Listings.
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