/RWALL/LAGMUL
Block Format Keyword 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_ID_{1}  grnd_ID_{2}  
D_{search}  
X_{M}  Y_{M}  Z_{M}  
Mass  VX_{0}  VY_{0}  VZ_{0}  
X_{M1}  Y_{M1}  Z_{M1}  
Blank Format 
Definitions
Field  Contents  SI Unit Example 

type  Rigid wall type
keyword (see table below) 

rwal_ID  Rigid wall
identifier (Integer, maximum 10 digits) 

unit_ID  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) 

grnd_ID_{1}  Node group defining
secondary nodes to be added to the rigid
wall. (Integer) 

grnd_ID_{2}  Node group defining
secondary nodes to be deleted from the rigid
wall. (Integer) 

D_{search}  Distance for secondary
search. (Real) 
$\left[\text{m}\right]$ 
X_{M}  X coordinate of M, if node_ID =
0. (Real) 

Y_{M}  Y coordinate of M, if node_ID =
0. (Real) 

Z_{M}  Z coordinate of M, if node_ID =
0. (Real) 

Mass  Mass of the rigid wall, if
node_ID ≠
0. (Real) 
$\left[\text{kg}\right]$ 
VX_{0}  Initial velocity in X
direction, if node_ID ≠
0. (Real) 
$\left[\frac{\text{m}}{\text{s}}\right]$ 
VY_{0}  Initial velocity in Y
direction, if node_ID ≠
0. (Real) 
$\left[\frac{\text{m}}{\text{s}}\right]$ 
VZ_{0}  Initial velocity in Z
direction, if node_ID ≠
0. (Real) 
$\left[\frac{\text{m}}{\text{s}}\right]$ 
X_{M1}  X coordinate of
M1 (Real) 

Y_{M1}  Y coordinate of
M1 (Real) 

Z_{M1}  Z coordinate of
M1 (Real) 
Rigid Wall Type
 Type
 Description
 PLANE
 $\overline{\infty}$ plane
Surface Input Type
 Type
 Description
 PLANE
 MM1 defines the normal direction
Comments
 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.
 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).
 The secondary nodes can be defined as a list by nodes and/or as the nodes that are initially at a distance less than D_{search} from the wall.
 The defined nodes must have a nonzero mass.