*HEADING
 ROTATING ACOUSTIC TORUS. 
 AC3D8 elements   
 Uses 2D dependency file  exa_acrotflowaxi.RES 
*PREPRINT,MODEL=YES,history=yes
*****************************
*NODE,NSET=NROAD
 1, 0.0, 0.0, 0.5
*SYMMETRIC MODEL GENERATION,REVOLVE,NODEOFF=500,ELEMENT=500
 0.0, 0.0, 0.0,    0.0, 0.0, 1.0
 0.0, 1.0, 0.0
 360.0, 60
*surface,NAME=STREAD
 ETREAD, S4
*****************************
*STEP
 REAL-EIGEN / LANCZOS COMPUTATION
*FREQUENCY
45,15.0,2700.0,
*ACOUSTIC FLOW VELOCITY,ROTATION
 TORUS_nset, 90.0e-4, 0,0,0,  0,0,1
*output, frequency=0, field
*output, frequency=0, history
*END STEP
*****************************
*STEP
 COMPLEX EIGEN
*COMPLEX FREQUENCY
7,45.0,1000.0,
*ACOUSTIC FLOW VELOCITY,ROTATION
 TORUS_nset, 90.0e-4, 0,0,0,  0,0,1
*output, frequency=0, field
*output, frequency=0, history
*END STEP
*****************************
*STEP
 REAL-EIGEN / LANCZOS COMPUTATION
*FREQUENCY
45,15.0,2700.0,
*ACOUSTIC FLOW VELOCITY,ROTATION
 TORUS_nset, 28.0, 0,0,0,  0,0,1
*output, frequency=0, field
*output, frequency=0, history
*END STEP
*****************************
*STEP
 COMPLEX EIGEN
*COMPLEX FREQUENCY
7,45.0,1000.0,
*ACOUSTIC FLOW VELOCITY,ROTATION
 TORUS_nset, 28.0, 0,0,0,  0,0,1
*output, frequency=0, field
*output, frequency=0, history
*END STEP
*****************************
*STEP
 REAL-EIGEN / LANCZOS COMPUTATION
*FREQUENCY
45,15.0,2700.0,
*ACOUSTIC FLOW VELOCITY,ROTATION
 TORUS_nset, 320.0, 0,0,0,  0,0,1
*output, frequency=0, field
*output, frequency=0, history
*END STEP
*****************************
*STEP
 COMPLEX EIGEN
*COMPLEX FREQUENCY
7,45.0,1000.0,
*ACOUSTIC FLOW VELOCITY,ROTATION
 TORUS_nset, 320.0, 0,0,0,  0,0,1
*output, frequency=0, field
*output, frequency=0, history
*END STEP