*HEADING
ECA8ERE1: EIGENVALUE ANALYSIS OF AN UNCONSTRAINED 1-ELEMENT MESH  [CAX8RE]
*PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE
 1,1.,0.
 3,3.,0.
 7,1.,1.
 9,3.,1.
*NGEN
 1,3
 7,9
 1,7,3
 3,9,3
*ELEMENT,TYPE=CAX8RE, ELSET=EALL
 1,1,3,9,7,2,6,8,4
*SOLID SECTION,MATERIAL=A1, ELSET=EALL
*MATERIAL,NAME=A1
*ELASTIC
 3.E6,0.3
*PIEZOELECTRIC,TYPE=S
15.08,-5.207,-5.207,0.,0.,0.,0.,0.
0.,12.710,0.,0.,0.,0.,0.,0.,
0.,0.
*DIELECTRIC,TYPE=ISO
5.872E-9, 
*DENSITY
7.5E-4, 
*STEP,PERTURBATION
FIRST STEP RESTRAINS ALL EPOT, COMPARE WITH CPS611 RESULTS
*FREQUENCY, eigensolver=lanczos, SIM=NO
5, , ,-1.E7 
*BOUNDARY
1,9
2,9
3,9
4,9
6,9
7,9
8,9
9,9
*MODAL FILE
*END STEP
*STEP,PERTURBATION
SECOND STEP RELEASES ALL BUT ONE EPOT
*FREQUENCY, eigensolver=lanczos, SIM=NO
5, , ,-1.E7 
*BOUNDARY
1,9
*MODAL FILE
*END STEP