In bead optimization, shell models might be modified by moving the nodes perpendicular to the
shells. Only nodes that are members of a shell element might be used as design nodes. Nodes for
solid elements cannot be design nodes.
Define a Design Variable in Tosca Structure.gui
- Choose Command > DV_BEAD in Tosca Structure.pre.
- In the DV_BEAD dialog, select a node group and assign an ID_NAME for further reference to the definition.
Supported Elements attached to Bead Sensitivity Design Nodes using SENS_CALC_MODE = TOSCA.
BEAD_SENSITIVITY is restricted to use only certain shell elements. When using
Tosca sensitivities, the element types below are supported.
Valid element types for sensitivity-based bead optimization |
Abaqus element type |
ANSYS® element type |
MSC Nastran® element type |
Shell elements |
SHELL_QUAD_4 |
S4 S4R |
SHELL143 SHELL181 SHELL41 SHELL43 SHELL63 |
CQUAD4 CQUADR CSHEAR |
SHELL_QUAD_8 |
S8R |
SHELL93 |
CQUAD8 |
SHELL_TRIANG_3 |
S3 S3R STRI3 |
|
CTRIA3 CTRIAR |
SHELL_TRIANG_6 |
|
|
CTRIA6 CTRIAX6 |
Supported Elements attached to Bead Sensitivity Design Nodes using
Abaqus.
When running with Abaqus
as a solver using bead sensitivities, Tosca does not
calculate the sensitivities on its own by default, but retrieves the sensitivity values
from the solver. The table below shows the supported elements.
Valid element types for sensitivity-based
nodal optimization with Abaqus sensitivities. |
Abaqus element type |
SHELL_QUAD_4 |
S4
S4R |
SHELL_QUAD_8 |
M3D8
S8R |
SHELL_TRIANG_3 |
S3
S3R
|