Objective Function

Bead optimization is mostly used to maximize stiffness of a structure or improve the dynamical properties of a shell structure. As already noted SIMULIA Tosca Structure.bead has two different optimization approaches (seeDifferences between bead optimization algorithms) . The possible design responses in the objective function is one of the major differences which becomes obvious by looking at the following table.

Static analysis	Gravity / Inertia	Frequency response
DISP_ABS	CENTER_GRAVITY_X	FS_ACCEL_X
DISP_X	CENTER_GRAVITY_Y	FS_ACCEL_Y
DISP_X_ABS	CENTER_GRAVITY_Z	FS_ACCEL_Z
DISP_Y	INERTIA_XX	FS_DISP_ABS
DISP_Y_ABS	INERTIA_XY	FS_DISP_X_ABS
DISP_Z	INERTIA_XZ	FS_DISP_Y_ABS
DISP_Z_ABS	INERTIA_YY	FS_DISP_Z_ABS
ROT_X	INERTIA_YZ	FS_VELOCITY_X
ROT_Y	INERTIA_ZZ	FS_VELOCITY_Y
ROT_Z		FS_VELOCITY_Z
STRAIN_ENERGY*
Modal analysis
DYN_FREQ*
DYN_FREQ_KREISSEL

Important:

Only design responses marked with * are allowed in controller-based algorithm (BEAD_CONTROLLER).
BEAD_HEIGHT is not allowed in sensitivity algorithm. Use DVCON_Bead instead.
The Gravity / Inertia design response types are only usable if at least one design response of the other types is used in the objective function or constraints.