*HEADING
  SPRING-MASS SYSTEM WITH COMPOSITE DAMPING
  MULTIPLE LOAD CASES TEST FOR B31,MASS,SPRING1,ROTARY 1 ELEMENTS
*NODE
1,0.
2,1.
*ELEMENT,TYPE=B31,ELSET=BEAM
100,1,2
*ELEMENT,TYPE=SPRING2,ELSET=SPRINGX
1,1,2
*ELEMENT,TYPE=SPRING2,ELSET=SPRINGY
11,1,2
*ELEMENT,TYPE=SPRING2,ELSET=SPRINGZ
21,1,2
*ELEMENT,TYPE=MASS,ELSET=MASS
2,1
*ELEMENT,ELSET=ROTI,TYPE=ROTARYI
3,1
*MASS,ELSET=MASS,COMPOSITE=0.01
0.1, 
*SPRING,ELSET=SPRINGX
1,1
160., 
*SPRING,ELSET=SPRINGY
2,2
160., 
*SPRING,ELSET=SPRINGZ
3,3
160., 
*ROTARY INERTIA,ELSET=ROTI,COMPOSITE=0.01
1.E-2,2.E-2,1.E-2
*BEAM SECTION,SECTION=RECT,ELSET=BEAM,MATERIAL=BEAM
0.1,0.1
*MATERIAL,NAME=BEAM
*ELASTIC
1.E6,0.3
*DENSITY
1.E-6, 
*BOUNDARY
2,1,6
*STEP
*FREQUENCY, eigensolver=lanczos
6, , 
*EL PRINT
E,S
*NODE PRINT
U, 
*OUTPUT,FIELD
*ELEMENT OUTPUT,ELSET=BEAM
SF,SE,ELSE
*ELEMENT OUTPUT
S,E
*NODE OUTPUT
U, 
*END STEP

***************************
***MULTIPLE LOAD CASE TEST
****************************
*STEP,PERTURBATION
*STATIC
*LOAD CASE,name=uniaxial-compression
*BOUNDARY
1,1,1,1
*END LOAD CASE
*LOAD CASE,name=uniaxial-tension
*CLOAD 
1,1,1000
*END LOAD CASE
*OUTPUT,FIELD
*ELEMENT OUTPUT,ELSET=BEAM
SF,SE,ELSE
*ELEMENT OUTPUT
S,E
*NODE OUTPUT
U, 
*END STEP