*HEADING
 VERIFICATION EXAMPLE FOR MODAL DYNAMIC (BASE MOTION)   
 SECONDARY BASE MOTION AND COMPOSITE MODAL DAMPING EXAMPLE
*PREPRINT,MODEL=NO
*NODE
 1,0
 4,30
*NGEN,NSET=ALL
 1,4
*NSET,NSET=TIP
 4,
*NSET,NSET=BOT
 1, 
*ELEMENT,TYPE=T3D2
 1,1,2
*ELGEN,ELSET=ALL
 1,3
*SOLID SECTION,MATERIAL=ALL,ELSET=ALL
 2.,
*MATERIAL,NAME =ALL
*ELASTIC
 5,
*DENSITY
 0.011111, 
*DAMPING,COMPOSITE=0.1
*BOUNDARY
 BOT,2,3 
 ALL,2,3
*AMPLITUDE,VALUE=ABSOLUTE,NAME=FTH
 0.,1.,  10.,1.
*STEP
*FREQUENCY, eigensolver=lanczos, SIM=NO
 3, , ,-10000. 
*BOUNDARY,BASENAME=BOT-1
 BOT,1,1 
*EL PRINT,FREQUENCY=0
*NODE PRINT,FREQUENCY=0
*MODAL FILE
*END STEP
*STEP
 MODAL DYNAMIC
*MODAL DYNAMIC
 0.1,0.3
*MODAL DAMPING,MODAL=COMPOSITE
 1,4,0.1
*SELECT EIGENMODES, GENERATE
1,4,1
*BASE MOTION,AMPLITUDE=FTH,DOF=1,BASENAME=BOT-1
*EL PRINT,SUMMARY=NO
 S,E
*NODE PRINT,SUMMARY=NO
 U,V,A
 TU,CF,RF,
*NODE FILE
 U,V,A,TU,RF
*EL FILE
 S,E
*MODAL PRINT
GU,GV,GA
 BM, 
*MODAL FILE
 BM, 
*END STEP