*HEADING
  TEST ALPHA DAMPING ON DIRECT INT.---*SHELL GEN SECTIION   
*NODE,NSET=ONE
1,0.,0.
4,0,1.
*NODE,NSET=TWO
2,10.,0.
3,10.,1.
*NSET,NSET=ALL
ONE,TWO
*ELEMENT,TYPE=S4R5 ,ELSET=TRUSS
1,1,2,3,4
*SHELL GENERAL SECTION,ELSET=TRUSS,DENSITY=317.
1.E7,  0.,1.E7, 0.,0., .5E7, 0.,0.
0., .08333E7,  0.,0.,0.,0.,.08333E7,0.
0.,0.,0.,0., .041666E7
*DAMPING,ALPHA=1.00472
*STEP
*STATIC
*BOUNDARY
1,1   ,3
4,1
4,3
2,2,3
3,2,3
2,1,,1.
3,1,,1.
ALL,4,6
*PRINT,RESIDUAL=NO,FREQUENCY=5
*EL FILE,FREQUENCY=25
SF, 
*EL PRINT,FREQUENCY=25,SUMMARY=NO
SF1, 
*NODE FILE,NSET=ONE
RF, 
*NODE FILE,NSET=TWO
U, 
*NODE PRINT,FREQUENCY=5,SUMMARY=NO
U1,V1,A1,RF1
*OUTPUT, FIELD, FREQUENCY=999
*NODE OUTPUT, NSET=ONE
RF,
*NODE OUTPUT, NSET=TWO
U,
*ELEMENT OUTPUT, ELSET=TRUSS
SF,
*OUTPUT, HISTORY, FREQUENCY=5
*NODE OUTPUT, NSET=ONE
RF,
*NODE OUTPUT, NSET=TWO
U,
*ELEMENT OUTPUT, ELSET=TRUSS
SF,
*END STEP
*STEP,INC=300
*DYNAMIC,ALPHA=0.,DIRECT
.01,2.5
*BOUNDARY,OP=NEW
1,1   ,3
4,1
4,3
2,2,3
3,2,3
ALL,4,6
*END STEP