Parameter Name |
Formula |
DISP_X, DISP_Y, DISP_Z |
|
ROT_X, ROT_Y, ROT_Z |
|
DISP_X_ABS, DISP_Y_ABS, DISP_Z_ABS |
|
DISP_ABS |
|
Analysis Types: Static Linear or Nonlinear Analysis
where K might be linear or nonlinear.
For displacements and rotations, the following table shows the allowed
combinations between the strategy and the items OBJ_FUNC
and CONSTRAINT
with C for controller and S for sensitivity
based optimization. Tosca sensitivities support nonlinear contact, but material
and large displacement theory are only supported by Tosca sensitivities for
Topology optimization. Sizing, Shape and Bead optimization only allow linear
material and small displacement theory.
|
TOPO |
SHAPE |
BEAD |
SIZING |
OBJ_FUNC |
S |
S |
S |
S |
CONSTRAINT |
S |
S |
S |
S |
Displacements and rotations are the primary variables in the FEM solution.
They are also very often the main interest of the FEM-analyst, for example, the
maximal displacement. Displacements and rotations should be defined
using a nodal id, although node groups might also be referenced. Large
node groups can lead to major performance issues, see
Group Operations for Design Responses.
Displacements and rotations can also be referenced in a local coordinate
system.