Analysis-Independent Design Response
For the bead height 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.
|
TOPO |
SHAPE |
BEAD |
SIZING |
OBJ_FUNC |
|
|
|
|
CONSTRAINT |
|
|
C |
|
The height of the bead stiffeners is formulated as a constraint of
the controller-based optimization problem. The bead height is initially
zero for all nodes and the optimizer moves the nodes in the shell normal
direction until they reach the bead height.
The bead height is defined by the DRESP
command
which is then referenced in the CONSTRAINT
command.
A typical bead height constraint could be defined as follows:
DRESP
ID_NAME = dresp_bead_height
DEF_TYPE = SYSTEM
ND_GROUP = design_nodes
TYPE = BEAD_HEIGHT
GROUP_OPER = MAX
END_
CONSTRAINT
ID_NAME = bead_height
DRESP = dresp_bead_height
MAGNITUDE = ABS
EQ_VALUE = 10.
END_