# Global Commands

This section contains the commands that define the global description of a problem or provide data that can be used globally.

These commands are optional. If any of these commands is not given, its default values are used.

This section contains the commands that define the global description of a problem or provide data that can be used globally.

These commands are optional. If any of these commands is not given, its default values are used.

**ANALYSIS**

Specifies global analysis data.**CONSTRAINT**

Specifies the constraints based on responses.**DESIGN VARIABLE**

Specifies design optimization variables.**DESIGN VARIABLES FIELD**

Specifies design optimization variables field for topology optimization.**EQUATION**

Specifies equation systems present in the problem.**EXTERNAL_CODE**

Specifies communication parameters for coupling with an external solid/structural code.**FIELD_BOUNDARY_CONDITION**

Specifies field quantity for boundary conditions.**FLEXIBLE_BODY**

Specifies a solid body for fluid-structure interaction.**MESH_MOTION**

Specifies mesh motion of nodes.**MULTIPLIER_FUNCTION**

Specifies a scalar multiplier function to scale values of other commands and parameters at run time.**NODAL SHAPES**

Specifies the morph shapes and associated design optimization variables.**OBJECTIVE**

Specifies the objective for an optimization problem.**OPTIMIZATION**

Specifies optimization is activated.**PARTICLE_TRACE**

Specifies communication parameters for coupling with AcuTrace.**RADIATION**

Specifies global radiation algorithms and parameters.**REFERENCE_FRAME**

Specifies a reference frame for element sets and boundary conditions.**RESPONSE VARIABLE**

Specifies the responses to be used for optimization.**SOLAR_RADIATION**

Specifies global solar radiation algorithms and parameters.**THERMAL_SHELL**

Creates shell elements from surface elements for temperature field only.**TURBULENCE_MODEL_PARAMETERS**

Specifies constants and parameters for turbulence models.**USER_GLOBAL_DATA**

Defines and initializes globally-accessible data.**WAVE_BOUNDARY_CONDITION**

Specifies a wave generator boundary condition.**WAVE_DAMPING_SOURCE**

Specifies a volumetric momentum source term to damp surface waves.