5.17. Supports

*BOUNDARY_SPC_SET

Specifies Fixed Support, Simply Supported, and Fixed Rotation constraints.

Card

  • NSID = ID of set of nodes to which the boundary is applied.

  • CID = ID of the associated coordinate system. 0 specifies the global coordinate system.

  • DOFX = 0 or 1. 0 means that the translation is free and 1 that the translation is constrained along the x direction. It is set to 0 for the Fixed Rotation boundary condition and to 1 for the Simply Supported boundary condition.

  • DOFY = 0 or 1. 0 means that the translation is free and 1 that the translation is constrained along the y direction. It is set to 0 for the Fixed Rotation boundary condition and to 1 for the Simply Supported boundary condition.

  • DOFZ = 0 or 1. 0 means that the translation is free and 1 that the translation is constrained along the z direction. It is set to 0 for the Fixed Rotation boundary condition and to 1 for the Simply Supported boundary condition.

  • DOFRX = 0 or 1. 0 means that the rotation is free and 1 that the rotation is constrained along the x direction. It is set to 0 for the Simply Supported Boundary Condition and to 1 for the Fixed Rotation Boundary Condition when the degree of freedom is fixed in that direction.

  • DOFRY = 0 or 1. 0 means that the rotation is free and 1 that the rotation is constrained along the y direction. It is set to 0 for the Simply Supported Boundary Condition and to 1 for the Fixed Rotation Boundary Condition when the degree of freedom is fixed in that direction.

  • DOFRZ = 0 or 1. 0 means that the rotation is free and 1 that the rotation is constrained along the z direction. It is set to 0 for the Simply Supported Boundary Condition and to 1 for the Fixed Rotation Boundary Condition when the degree of freedom is fixed in that direction.

*BOUNDARY_PRESCRIBED_MOTION_RIGID

See *BOUNDARY_PRESCRIBED_MOTION_SET

*BOUNDARY_PRESCRIBED_MOTION_SET

Specifies velocity and displacement boundary conditions.

Card1

  • ID = ID of set of nodes or part (for rigid bodies) to which the boundary condition is applied.

  • DOF = 1, 2 or 3 depending on whether the boundary condition is in the x, y or z direction respectively, and is a translational boundary condition.

    DOF = 4, 5 or 6 depending on whether the boundary condition is in the x, y or z direction respectively, and is a rotational boundary condition.

    Setting 4 is used if the boundary is applied according to a local coordinate system.

  • VAD = 0 or 2 depending whether the boundary condition is velocity or displacement.

  • LCID = ID of the curve prescribing the magnitude of the boundary condition. Constant values of velocity are applied as a step function from time = 0. Constant values of displacement are ramped from zero at time = 0 to the constant value at termination time. This is done to make sure that displacements are applied in a transient fashion.

  • SF = 1.0 (default) scale factor for load curve.

  • VID = 0 (default). ID of vector that defines the local coordinate system the boundary condition is applied with.

  • DEATH = 0.0 (default), sets it to 1E28.

  • BIRTH = 0, the motion is applied from the beginning of the solution.

Card2: not required.

*BOUNDARY_TEMPERATURE

This keyword is written when a Temperature object is inserted into the system. It is always written with the option _SET. Even with constant values, a *DEFINE_CURVE keyword is used.

Card:

  • NID: Automatically written.

  • TLCID: Automatically written. The corresponding *DEFINE_CURVE keyword is written using the values written in Magnitude under Definition.

  • TMULT = 1.

*BOUNDARY_CONVECTION

This keyword is written when a Convection object is inserted into the system. It is always written with the option _SET. Even with constant values, a *DEFINE_CURVE keyword is used.

Card:

  • SSID: Automatically written.

  • HLCID: Automatically written. The corresponding *DEFINE_CURVE keyword is written using the values written in Film Coefficient under Definition.

  • HMULT = 1.

  • TLCID: Automatically written. The corresponding *DEFINE_CURVE keyword is written using the values written in Ambient Temperature under Definition.

  • TMULT = 1.

*BOUNDARY_FLUX

This keyword is written when a Heat Flux object is inserted into the system. It is always written with the option _SET. Even with constant values, a *DEFINE_CURVE keyword is used.

Card:

  • SSID: Automatically written.

  • LCID: Automatically written. The corresponding *DEFINE_CURVE keyword is written using the values written in Magnitude under Definition.

  • MLC1 = -1

  • MLC2 = -1

  • MLC3 = -1

  • MLC4 = -1