Defining Design variables | ||||||
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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:
DV_SHAPE ID_NAME = design_variables ND_GROUP = design_nodes END_ DRESP ID_NAME = DRESP_SIG DEF_TYPE = SYSTEM TYPE = SIG_MISES UPDATE = EVER EL_GROUP = ALL_ELEMENTS GROUP_OPER = SUM END_ DRESP ID_NAME = DRESP_VOL DEF_TYPE = SYSTEM TYPE = VOLUME UPDATE = EVER EL_GROUP = ALL_ELEMENTS GROUP_OPER = SUM END_ OBJ_FUNC ID_NAME = minimize_stress DRESP = DRESP_SIG TARGET = MIN END_ CONSTRAINT ID_NAME = volume_constraint DRESP = DRESP_VOL MAGNITUDE = REL EQ_VALUE = 0.45 END_ OPTIMIZE ID_NAME = topology_optimization DV = design_variables OBJ_FUNC = minimize_stress CONSTRAINT = volume_constraint STRATEGY = SHAPE_CONTROLLER END_