Defining Design variables | ||||||
|
| |||||
Define a Design variable in Tosca ANSA® environment
Select the node group of design nodes.
Define a Design variable in Tosca Structure.gui
In the DV_SHAPE dialog, select a node group and assign an ID_NAME for further reference to the definition.
Define a Design variable in the SIMULIA Tosca Structure Parameter File
- To define Design variables in the parameter file use the DV_SHAPE
command.
Each DV_SHAPE definition has a name (ID_NAME parameter) and references a previously defined node group (ND_GROUP parameter). The name is required in order to subsequently activate the DV_SHAPE definition when specifying the optimization job (see OPTIMIZE command). The design area is specified by the node group. These two declarations are mandatory. Other declarations cannot be made.
A typical DV_SHAPE command appears as follows:
DRESP ID_NAME = DRESP_SUM_ENERGY DEF_TYPE = SYSTEM TYPE = STRAIN_ENERGY UPDATE = EVER EL_GROUP = ALL_ELEMENTS GROUP_OPER = SUM END_ DRESP ID_NAME = DRESP_VOL_TOPO DEF_TYPE = SYSTEM TYPE = VOLUME UPDATE = EVER EL_GROUP = ALL_ELEMENTS GROUP_OPER = SUM END_ OBJ_FUNC ID_NAME = maximize_stiffness DRESP = DRESP_SUM_ENERGY TARGET = MIN END_ CONSTRAINT ID_NAME = volume_constraint DRESP = DRESP_VOL_TOPO MAGNITUDE = REL EQ_VALUE = 0.45 END_ OPTIMIZE ID_NAME = topology_optimization DV = design_variables OBJ_FUNC = maximize_stiffness CONSTRAINT = volume_constraint STRATEGY = TOPO_CONTROLLER END_