*HEADING
 ROTATING ACOUSTIC TORUS.
 AC3D8 elements
 Uses 2D dependency file  exa_acrotflowaxi.RES
*PREPRINT,MODEL=YES,history=yes
*****************************
*NODE,NSET=NROAD
*SYMMETRIC MODEL GENERATION,REVOLVE,NODEOFF=500,ELEMENT=500
*surface,NAME=STREAD
 ETREAD, S4
*****************************
*STEP,INC=100
 STEADY STATE ROLLING, SLOW
*STEADY STATE TRANSPORT
*ACOUSTIC FLOW VELOCITY,ROTATION
 TORUS_nset, 90.0e-4, 0,0,0,  0,0,1
*END STEP
*****************************
*STEP
 REAL-EIGEN / LANCZOS COMPUTATION
*FREQUENCY
45,15.0,2700.0,
*END STEP
*****************************
*STEP
 COMPLEX EIGEN
*COMPLEX FREQUENCY
*END STEP
*****************************
*STEP,INC=100
 STEADY STATE ROLLING, 100 KPH
*STEADY STATE TRANSPORT
*ACOUSTIC FLOW VELOCITY,ROTATION
 TORUS_nset, 28.0, 0,0,0,  0,0,1
*END STEP
*****************************
*STEP
 REAL-EIGEN / LANCZOS COMPUTATION
*FREQUENCY
45,15.0,2700.0,
*END STEP
*****************************
*STEP
 COMPLEX EIGEN
*COMPLEX FREQUENCY
*END STEP
*****************************
*STEP,INC=100
 STEADY STATE ROLLING, M = 0.3
*STEADY STATE TRANSPORT
*ACOUSTIC FLOW VELOCITY,ROTATION
 TORUS_nset, 320.0, 0,0,0,  0,0,1
*END STEP
*****************************
*STEP
 REAL-EIGEN / LANCZOS COMPUTATION
*FREQUENCY
40,15.0,2700.0,
*END STEP
*****************************
*STEP
 COMPLEX EIGEN
*COMPLEX FREQUENCY
*END STEP