*HEADING
 FREE VIBRATION OF SPHERICAL SHELL--SAXA23   
*PREPRINT, ECHO=NO, MODEL=NO, HISTORY=NO
*NODE
 1,  0.0, -3.0
 81, 0.0,  3.0
*NGEN,LINE=C
 1,81,1,,0.0,0.0,0.0, 0.0,0.0,1.0
*ELEMENT,TYPE=SAXA23
 1,1,2,3
*ELGEN,ELSET=EALL
 1,40,2,1
*SHELL SECTION,MATERIAL=MAT1,ELSET=EALL
 0.03,3
*MATERIAL,NAME=MAT1
*ELASTIC
 180E9,0.333333
*DENSITY
 7670,
*RESTART,WRITE
*STEP
*FREQUENCY,EIGENSOLVER=LANCZOS, SIM=NO
 20,,,-10
*EL PRINT,FREQUENCY=0
*NODE PRINT,FREQUENCY=0
*MODAL FILE
*OUTPUT,HISTORY,FREQUENCY=1
*MODAL OUTPUT
*END STEP