Determine the natural frequencies and mode shapes

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Unformatted text preview: ttom 358,420 σθ (2), Bottom -213,400 Ratio ETYP N DOF UY(1) σz (1), Bottom σθ (2), Bottom Results Comparison - Quadrilateral Elements 43 4 150 1.049 .940 .983 43 8 486 1.008 .998 .985 63 4 150 1.008 .928 1.017 63 8 486 .997 .994 .994 93 4 390 1.012 .956 1.028 93 8 1350 1.002 1.001 1.002 181 4 150 1.048 0.940 0.983 181 8 486 1.008 0.999 0.985 Results Comparison - Triangular Elements 43[1] 4 222 .763 .507 .721 43[1] 8 546 .905 .731 .887 63 4 222 .791 .525 .771 63 8 546 .916 .737 .900 93 4 774 .971 .954 .985 93 8 1974 .991 .990 .995 ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 2–13 Benchmark C3 Ratio σθ (2), Bottom N DOF 181 4 222 .780 .512 .742 181 8 546 .899 .723 .893 1. UY(1) σz (1), Bottom ETYP SHELL43 in triangular form is not recommended. Assumptions, Modeling Notes, and Solution Comments 1. The problem is designed to test singly-curved shell elements under membrane and bending deformation. The quadrilateral mesh patterns produce uniform rectangula...
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