*HEADING
  TEST BETA DAMPING ON DIRECT INTEGRATION--TRUSS       
*NODE, NSET=NALL
1,0.,0.
2,10.,0.
*ELEMENT,TYPE=T3D2,ELSET=TRUSS
1,1,2
*SOLID SECTION,ELSET=TRUSS,MATERIAL=MTRUSS
1., 
*MATERIAL,NAME=MTRUSS
*ELASTIC
1E7, 
*DENSITY
317., 
*DAMPING,BETA=1.59248E-3
*STEP
*STATIC
*BOUNDARY
1,1,3
2,2,3
2,1,,1.
*PRINT,RESIDUAL=NO,FREQUENCY=5
*EL FILE,FREQUENCY=25
S,E
*EL PRINT,FREQUENCY=25,SUMMARY=NO
S,E
*NODE FILE,FREQUENCY=5
U,
*NODE PRINT,FREQUENCY=5,SUMMARY=NO
U1,V1,A1,RF1
*OUTPUT, FIELD, FREQUENCY=999
*NODE OUTPUT, NSET=NALL
U, 
*ELEMENT OUTPUT, ELSET=TRUSS
S,E
*OUTPUT, HISTORY, FREQUENCY=5
*NODE OUTPUT, NSET=NALL
U, 
*ELEMENT OUTPUT, ELSET=TRUSS
S,E
*END STEP
*STEP,INC=300
*DYNAMIC,ALPHA=0.,DIRECT
.01,2.5
*BOUNDARY,OP=NEW
1,1,3
2,2,3
*END STEP