2021

2021

/BCS/LAGMUL

Block Format Keyword Defines boundary conditions on node groups using Lagrange multipliers. This keyword is not available for SPMD computation.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
/BCS/LAGMUL/`bcs_ID`
`bcs_title`
`Trarot`	`Skew_ID`	`grnd_ID`

Definitions

Field	Contents	SI Unit Example
`bcs_ID`	Boundary conditions block identifier. (Integer, maximum 10 digits)
`bcs_title`	Boundary condition block title. (Character, maximum 100 characters)
`Trarot`	Codes for translation and rotation. = 0 Free DOF = 1 Fixed DOF (6 Booleans) Example: 101 111 means the x and z translations, as well as all rotations are fixed; the y translation is free.
`Skew_ID`	Skew identifier. If not zero, the boundary conditions are applied with respect to this local skew. (Integer)
`grnd_ID`	Identifier of the node group on which boundary conditions are applied. (Integer)

Codes for Translation and Rotation: Input format for the first field (1) Trarot

(1)-1	(1)-2	(1)-3	(1)-4	(1)-5	(1)-6	(1)-7	(1)-8	(1)-9	(1)-10
			`T`_X	`T`_Y	`T`_Z		$ω_{X}$ $ω_{X}$	$ω_{Y}$ $ω_{Y}$	$ω_{Z}$ $ω_{Z}$

Definitions

Field	Contents	SI Unit Example
`T`_X	Code for translation `T`_X = 0 Free DOF = 1 Fixed DOF (Boolean)
`T`_Y	Code for translation `T`_Y = 0 Free DOF = 1 Fixed DOF (Boolean)
`T`_Z	Code for translation `T`_Z = 0 Free DOF = 1 Fixed DOF (Boolean)
$ω_{X}$ $ω_{X}$	Code for rotation $ω_{X}$ $ω_{X}$ = 0 Free DOF = 1 Fixed DOF (Boolean)
$ω_{Y}$ $ω_{Y}$	Code for rotation $ω_{Y}$ $ω_{Y}$ = 0 Free DOF = 1 Fixed DOF (Boolean)
$ω_{Z}$ $ω_{Z}$	Code for rotation $ω_{Z}$ $ω_{Z}$ = 0 Free DOF = 1 Fixed DOF (Boolean)

Comments

The grnd_ID input is obligatory. The boundary conditions will be applied only on nodes that belong to a node group.
Input format details for the field Trarot are shown above. The six individual codes (one per direction) must be right justified in the ten character fields used by the variable Trarot.