Transcription of ANSYS Mechanical-APDL Harmonic Analysis Example and ...
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ANSYS Mechanical-APDL Harmonic Analysis Example and Comparison to ANSYS Mechanical resultsDave JohnsonPenn State Erie9/11/20171 Disk modal and Harmonic analyses Steel disk - 75 mm radius and 3mm radius center hole, and mm thickness9/11/2017 1421 SHELL 181 elements Modulus = 200,000 Mpa Poisson s Ratio = Density = tonnes/mm3 TOTAL MASS: (tonne) Support: simply-supported, (no translation: UX = UY = UZ = 0) at the edge of the hole2 Hand calc for verification and validation of modal Analysis resultsReference: Mark s Standard Handbook for Mechanical Engineers, 8th ed., p. 5-75 For a flat circular plate constrained at the center, the umbrella mode (zero nodal diameters) is predicted by:9/11/2017 Where: E = elastic modulus (N/mm2) r = plate radius (mm) g = gravity acceleration (mm/s2) = Poisson s ratio t = plate thickness (mm)3 Hand calc for verification and validation of modal Analysis results** FREQUENCIES FROM BLOCK LANCZOS ITERATION **MODE FREQUENCY (HERTZ)FREQUENCY RANGE REQUESTED=
MSHAPE,0,2D ! MSHKEY,0 ! allow "free" meshing !* AMESH,all ! create the mesh FINISH /SOLU ANTYPE,2 ! Modal analysis MODOPT,LANB,50 ! use (default) Block Lanczos method EQSLV,SPAR MXPAND,50, , ,0 ! extract & expand up to 50 modes LUMPM,0 PSTRES,0 !* MODOPT,LANB,50,0,500, ,OFFbv ! frequency range 0 - 500 Hz ...
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