For solid45 8p or 80 mdofs are required to capture

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Unformatted text preview: sidering a single mesh density of quadrilateral elements using Householder eigenvalue extraction for three sets of master degrees of freedom. Figure C4.1 Thin Annular Plate Problem Sketch Material Properties E = 200 x 109 N/m2 υ = 0.3 ρ = 8000 kg/m3 Geometric Properties a = 1.8 m b = 6.0 m t = 0.06 m Loading and Boundary Conditions All nodes UX = UY = ROTZ = 0 in cylindrical coordinate system; At x = b UZ = 0 At x = b ROTZ = 0 Parameter Definitions N1 = No. elements along radial direction N2 = No. elements along circumferential direction ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 2–15 Benchmark C4 Figure C4.2 Representative Mesh Options Target Solution Mode 1 Frequency (Hz) 2 1.870 5.137 3 5.137 4 9.673 5 9.673 6 14.850 7 15.573 8 15.573 9 18.382 Results Comparison - First Study on Subspace Extraction Method Frequency Ratio ETYP N1 N2 DOF 1 2 3 4 5 6 7 8 9 Quadrilateral Mesh 43 3 16 480 0.972 1.103 1.103 1.132 1.132 0.901 1.098 1.098 0.947 43[1] 5 32 1296 0.991 1.024 1.020 1.022 1.022 0.961 1.015 1.015 0.974 63...
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This note was uploaded on 12/09/2010 for the course DEPARTMENT E301 taught by Professor Kulasinghe during the Spring '09 term at University of Peradeniya.

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