*HEADING
 1D transient wave propagation, solid  medium, incident wave load, planar
 and defined through pressure amplitude
**
** Analytical solution to prescribed constant acceleration of a0 at z=0
**
** p(z,t) = (K a0 / c^2) (ct - z)  for z < ct
**        = 0                      for z > ct
**
*PREPRINT,ECHO=NO,HISTORY=NO,MODEL=YES
*NODE, NSET=PLATE
 1, 0. , 0. ,
 2, 1. , 0. ,
*ELEMENT,TYPE=SAX1,ELSET=PLATE
 1,2,1
**************************
*SURFACE,NAME=IW_LOAD
PLATE,SPOS
**************************
**CROSS-SECTION IS Pi
*SHELL SECTION,MATERIAL=SOLID,ELSET=PLATE
 1.E-4,
**
*MATERIAL,NAME=SOLID
*DENSITY
 1.E3,
*ELASTIC
 1.E6,0.0
**
**************************
*INCIDENT WAVE PROPERTY,NAME=IWPROP,TYPE=PLANE
0.0,0.0,
0.0,-10.0
*INCIDENTWAVE FLUID PROPERTY
0.1424E6,1.21,0.0
*AMPLITUDE,DEFINITION=TABULAR,NAME=PRESSUREVTIME
0.0,0.0,0.0005,1.0
**************************
*BOUNDARY
PLATE,ENCASTRE
**
**************************
*RESTART,WRITE
**
*STEP
*DYNAMIC,EXPLICIT, DIRECT USER
0.2E-4,.0005,
**
*INCIDENTWAVE,PRESSUREAMPLITUDE=PRESSUREVTIME,PROPERTY=IWPROP
IW_LOAD,1.E3
**
*OUTPUT,FIELD,NUMBER INTERVAL=2
*NODE OUTPUT,NSET=PLATE
 RF,
*OUTPUT,HISTORY,TIME INTERVAL=0.1E-3
*NODE OUTPUT,NSET=PLATE
 RF,
*ENDSTEP
**
**