Constraints

Constraints are fundamental parts of the definition for an optimization task. The purpose of having constraints is to ensure that the optimized design is feasible.

See Also
About Constraints
Design Responses
In Other Guides
CONSTRAINT

Overview

The following table gives an overview of all supported design responses as a constraint in sizing optimization:
Static analysis Description

CENTER_GRAVITY_X

CENTER_GRAVITY_Y

CENTER_GRAVITY_Z

Center of gravity design responses

DISP_ABS

DISP_X

DISP_Y

DISP_Z

DISP_X_ABS

DISP_Y_ABS

DISP_Z_ABS

Displacement design responses

ENERGY_STIFF_MEASURE

Energy stiffness measure design response

INERTIA_XX

INERTIA_XY

INERTIA_XZ

INERTIA_YY

INERTIA_YZ

INERTIA_ZZ

Moment of inertia design responses

INTERNAL_FORCE_ABS

INTERNAL_FORCE_X

INTERNAL_FORCE_Y

INTERNAL_FORCE_Z

INTERNAL_FORCE_X_ABS

INTERNAL_FORCE_Y_ABS

INTERNAL_FORCE_Z_ABS

Internal force design responses

INTERNAL_MOMENT_ABS

INTERNAL_MOMENT_X

INTERNAL_MOMENT_Y

INTERNAL_MOMENT_Z

INTERNAL_MOMENT_X_ABS

INTERNAL_MOMENT_Y_ABS

INTERNAL_MOMENT_Z_ABS

Internal moment design responses

PEMAG

Plastic strain magnitude**

REACTION_FORCE_ABS

REACTION_FORCE_X

REACTION_FORCE_Y

REACTION_FORCE_Z

REACTION_FORCE_X_ABS

REACTION_FORCE_Y_ABS

REACTION_FORCE_Z_ABS

Reaction force design responses

REACTION_MOMENT_X

REACTION_MOMENT_Y

REACTION_MOMENT_Z

REACTION_MOMENT_X_ABS

REACTION_MOMENT_Y_ABS

REACTION_MOMENT_Z_ABS

Reaction moment design responses

ROT_ABS

ROT_X

ROT_Y

ROT_Z

ROT_X_ABS

ROT_Y_ABS

ROT_Z_ABS

Rotation design responses

SIG_1

Maximum principal stress.

SIG_3

Minimum principal stress.

SIG_SENS_MISES

Von Mises Stress design responses

SIG_SENS_MISES is used for sensitivity calculation.

SIG_SIGNED_MISES

Signed von Mises stress failure criteria.

SIG_GLINKA_EEQ

SIG_GLINKA_PEEQ

SIG_GLINKA_SEQ

SIG_NEUBER_EEQ

SIG_NEUBER_PEEQ

SIG_NEUBER_SEQ

Glinka and Neuber formulations for equivalent strain (_EEQ), stress (_SEQ) and plastic strain (_PEEQ) using the plastic correction factor, respectively**.

WEIGHT

Weight design response

STRAIN_ENERGY

Strain energy design response*

Modal analysis Description

DYN_FREQ

Dynamic frequency design response*

Independent of Analysis Type Description
Frequency response Description

FS_ACCEL_X

FS_ACCEL_Y

FS_ACCEL_Z

Acceleration for frequency response

FS_PHASE_X

FS_PHASE_Y

FS_PHASE_Z

Phase for frequency response

FS_DISP_ABS

FS_DISP_X_ABS

FS_DISP_Y_ABS

FS_DISP_Z_ABS

Amplitude for frequency response

FS_VELOCITY_X

FS_VELOCITY_Y

FS_VELOCITY_Z

Velocity for frequency response

FS_COMP

FS_DBA_PRESSURE

FS_DB_PRESSURE

FS_PRESSURE

FS_RMS_PRESSURE

Dynamic compliance for frequency response

Sound Pressure Level [dBA] for frequency response

Sound Pressure Level [dB] for frequency response

Instantaneous Sound Pressure [Pa] for frequency response

Effective Sound Pressure(RMS)[Pa] for frequency response

Analysis independent Description

VOLUME

Volume design response

Important:
  • The Gravity / Inertia design response types are usable only if at least one design response of the other types is used in the objective function or constraints.
  • Design responses marked with ** are only allowed using Abaqus sensitivities.