Couple Freedoms

Couple Freedoms

 

Description

 

Two keywords may be used to define ParaGeo coupled freedom sets depending on the specific constraint that will be applied:

1.*COUPLE FREEDOMS may be used to constrain displacements (freedoms) in one or several directions for a list of geometry sets. In this case the displacement in the specified directions is equal for all nodes in geometry set list.

2.*TIE may be used to tie conditions (degrees of freedom) from one geometry entity to one or more geometry entities using a master/slave approach, so that displacements for the Slave geometry entities are constrained to be equal to the Master geometry entity.

 

 

Click to expand/collapseCOUPLE FREEDOMS    Definition of Couple Freedoms data

Usage

*COUPLE FREEDOMS,  NAME=Couple_freedoms_set_name,  TYPE=DCouple_freedoms_type

Description

Defines Couple Freedoms data for generation of ParaGeo Couple_freedoms data. A list of geometry sets must be provided after the keyword and its corresponding parameters. Then specified freedoms will be coupled for specified geometry sets so that the displacement in the specified direction for a given geometry set in the list will be constant i all its nodes.

 

Compulsory Parameters

TYPE

Defines the directions of the coupled freedoms. Valid options are:

- X (displacement in X direction)

- Y (displacement in Y direction)

- Z (displacement in Z direction)

- XY (displacement in X and Y directions)

- XZ (displacement in X and Y directions)

- YZ (displacement in Y and Z directions)

- XYZ (displacements in X, Y and Z directions)

 

Optional Parameters

NAME

Defines a name for the Couple Freedoms Set.

 

 

Examples

 

*COUPLE FREEDOMS, TYPE=X

 West, East

 

 

1Displacement in X direction for West and East geometry sets will have coupled freedoms (so that displacement in X direction for all nodes of West and East will be the same)

 

 

 

 

Click to expand/collapseTIE

Usage

*TIE,  NAME=Name_Master_ID,  DISPLACEMENT=Yes_or_No, PORE PRESSURE=Yes_or_No, TEMPERATURE=Yes_or_No (NOT IMPLEMENTED)

Description

*TIE keyword is equivalent to ParaGeo Coupled_dreedoms data structure. Defines data to tie freedoms from one geometry entity (master) to one or more additional geometry entities (slaves) following Master/Slave approach. Following the *TIE keyword and all corresponding parameters a list with all slave entities must be provided.

 

Compulsory Parameters

NAME

Defines the name of the geometry entity that will be considered the master for the tie conditions.

DISPLACEMENT

Defines whether the displacement in slave entities will be prescribed according to displacement in master entity. Valid options are:

- YES

- NO

PORE PRESSURE

Defines whether the pore pressure in slave entities will be prescribed according to pore pressure in master entity. Valid options are:

- YES

- NO

TEMPERATURE

Defines whether the temperature in slave entities will be prescribed according to temperature in master entity. Valid options are:

- YES

- NO

 

 

Examples

 

*TIE, NAME=Master_surface1, DISPLACEMENT=YES

 Slave_surface1, Slave_surface2

 

1Displacement of surfaces Slave_surface1 and Slave_surface2 will be prescribed according to displacement by Master_surface1