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Unformatted text preview: s type of loading, hence underpredicting both displacement and stresses. For triangular elements,
only a fine mesh using the quadratic SHELL93 elements produces acceptable results. 2–14 ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. VMC4: Simply-Supported Thin Annular Plate
Reference: J. Barlow, G. A. O. Davis, “Selected FE Benchmarks in Structural and Thermal
Analysis”, NAFEMS Rept. FEBSTA, Rev. 1, October 1986, Test No. 14 (modified). Analysis Type(s): Mode-frequency Analysis (ANTYPE = 2) Element Type(s): 4-Node Plastic Large Strain Shell Elements (SHELL43)
Elastic Shell Elements (SHELL63]
8-Node Structural Shell Elements (SHELL93] Input Listing: vmc4.dat Test Case
A simply-supported thin annular plate of thickness t is to be analyzed to determine the first nine natural frequencies. Determine the natural frequencies for two mesh densities using both quadrilateral and triangular element
shapes with subspace eigenvalue extraction. Next, determine the natural frequencies con...
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