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/RWALL/LAGMUL

/RWALL/LAGMUL

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Block Format Keyword

/RWALL/LAGMUL - Lagrange Multiplier Rigid Wall

Description

Defines infinite plane rigid walls using the Lagrange multiplier method. This keyword is not available for SPMD computation.

Format

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/RWALL/LAGMUL/type/rwal_ID/unit_ID

rwal_title

node_ID

Slide

grnd_ID1

grnd_ID2

 

 

 

 

 

 

Dsearch

 

 

 

 

 

 

 

 

XM

YM

ZM

 

 

 

 

Mass

VX0

VY0

VZ0

 

 

XM1

YM1

ZM1

 

 

 

 

Blank Format
hmtoggle_plus1 Flag Definition

Field

Contents

SI Unit Example

type

Rigid wall type keyword

(see table below)

 

rwal_ID

Rigid wall identifier

(Integer, maximum 10 digits)

 

unit_ID

Optional unit identifier

(Integer, maximum 10 digits)

 

rwal_title

Rigid wall title

(Character, maximum 100 characters)

 

node_ID

Node identifier (moving rigid wall)

(Integer)

 

Slide

Sliding flag

(Integer)

= 0: Sliding

= 1: Tied

 

grnd_ID1

Node group defining slave nodes to be added to the rigid wall

(Integer)

 

grnd_ID2

Node group defining slave nodes to be deleted from the rigid wall

(Integer)

 

Dsearch

Distance for slave search

(Real)

symbol_m

XM

X coordinate of M, if node_ID = 0

(Real)

 

YM

Y coordinate of M, if node_ID = 0

(Real)

 

ZM

Z coordinate of M, if node_ID = 0

(Real)

 

Mass

Mass of the rigid wall, if node_ID ≠ 0

(Real)

symbol_kg_unit

VX0

Initial velocity in X direction, if node_ID ≠ 0

(Real)

fail_lad_SI_k

VY0

Initial velocity in Y direction, if node_ID ≠ 0

(Real)

fail_lad_SI_k

VZ0

Initial velocity in Z direction, if node_ID ≠ 0

(Real)

fail_lad_SI_k

XM1

X coordinate of M1

(Real)

 

YM1

Y coordinate of M1

(Real)

 

ZM1

Z coordinate of M1

(Real)

 
hmtoggle_plus1Rigid Wall Type

Type

Description

PLANE

rwall_lagmul_planeplane
hmtoggle_plus1Surface Input Type

Type

Description

Sketch

PLANE

MM1 defines the normal direction

rwall_lagmul_plane2
hmtoggle_plus1Comments
1.The first input to define the rigid wall is the coordinates of one point M or a node_ID in case of moving rigid wall.
2.The next input is the coordinate of a point M1 and possibly a point M2 (in the case of a moving wall, M1 and M2 have the same motion as node_ID).
3.The slave nodes can be defined as a list by nodes and/or as the nodes that are initially at a distance less than Dsearch from the wall.
4.The defined nodes must have a non-zero mass.

See Also:

Implicit Features and Compatibility Information

Incompatible Kinematic Conditions in User's Guide