*HEADING
DSA CANTILEVER PROBLEM
1x400 MESH using 400 beam elements
*PREPRINT, MODEL=YES
*PARAMETER
L=0.0
*DESIGN PARAMETER
L,
*Node
*NGEN, NSET=N1
*NGEN, NSET=N2
**NFILL
**N1, N2,1  ,  200
*PARAMETER SHAPE VARIATION, PARAMETER=L
 ** 401, -1.0, 0.0, 0.0
*ELEMENT, TYPE=s4r
*ELGEN, ELSET=EALL
*MATERIAL, NAME=ABAQUS
*ELASTIC
210000., 0.1
*DENSITY
0.1,
*SHELL SECTION,ELSET=EALL,MATERIAL=ABAQUS
2,
***SOLID SECTION, ELSET=EALL, MATERIAL=ABAQUS
**1.0,
*ELSET,ELSET=EFIXED
*NSET,NSET=BOUND
*NSET,NSET=NFREE
*BOUNDARY
BOUND, 1, 6, 0.0
*STEP, DSA
*STATIC
1.0, 1.0
*CLOAD
  1, 2,  0.5
501, 2,  0.5
**401, 2,  -0.5
*OUTPUT, FIELD
*ELEMENT OUTPUT,ELSET=EFIXED
S,
*NODE OUTPUT,NSET=NFREE
U,
*OUTPUT, HISTORY, FREQUENCY=0
*DESIGN RESPONSE
*NODE RESPONSE,NSET=NFREE
U,
*ELEMENT RESPONSE,ELSET=EFIXED
S,
*END STEP
*STEP,DSA
*FREQUENCY,EIGENSOL=LANCZOS
 10,
***DSA CONTROLS, SIZING FREQUENCY=1
*DESIGN RESPONSE
*END STEP