*HEADING
Use reaction forces to compute CONWEP incident and reflected pressures
**
** DEFORMABLE ELEMENT
**
*NODE
1001,  -25., -25.,  250.0
1002,  -25.,  25.,  250.0
1003,   25., -25.,  250.0
1004,   25.,  25.,  250.0
2001,  -25., -25., -250.0
2002,  -25.,  25., -250.0
2003,   25., -25., -250.0
2004,   25.,  25., -250.0
**
*NODE, NSET=NSOURCE
 1, 0., 0., 0.
**
*NSET, NSET=NBC
1001, 1002, 1003, 1004, 2001, 2002, 2003, 2004
**
*ELEMENT, TYPE=S4RS, ELSET=PLATE
401, 1001, 1002, 1004, 1003
402, 2001, 2002, 2004, 2003
*Shell section, Elset=PLATE, Material=METAL
  5.0, 3
**
*MATERIAL, NAME=METAL
*DENSITY
 2.78e-9,
*ELASTIC
 6.9e+4, 0.3
**
*BOUNDARY
NBC,     1, 6
NSOURCE, 1, 6
**
*SURFACE,Type=element,NAME=Front
401, SPOS
**
*SURFACE,Type=element,NAME=Back
402, SPOS
**
*INCIDENT WAVE INTERACTION PROPERTY, NAME=Small_Charge, TYPE=AIR BLAST
*CONWEP Charge Property
** 
** Conwep units: TNT mass=ton, length=mm, time=sec, pressure=MPa
**
5.e-4, 1000.
1.e-3, 1., 1.e6
**
*STEP
*DYNAMIC,EXPLICIT, DIRECT USER CONTROL
 2.e-08, 2.e-04
**
*INCIDENT WAVE INTERACTION, PROPERTY=Small_Charge, CONWEP
Front, NSOURCE, , 0.0, 1.0
**
*INCIDENT WAVE INTERACTION, PROPERTY=Small_Charge, CONWEP
Back, NSOURCE
**
*OUTPUT, FIELD, NUMBER=2
*NODE OUTPUT,NSET=NBC
 RT,
*OUTPUT,HISTORY,FREQ=1,OP=NEW
*NODE OUTPUT,NSET=NBC
 RT
*END STEP