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Unformatted text preview: Test case corresponds to NAFEMS test specification Figure C5.2 Representative Mesh Options 2–20 ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. Benchmark C5 Figure C5.3 Graphical Results - Mode Shapes Assumptions, Modeling Notes, and Solution Comments
1. The problem is designed to test the calculation of rigid body modes, coincident frequencies, and associated mode shapes. 2. Master degree of freedom selection for the tests is based on an even multiple of the desired number of
modes (P = 10). Masters are chosen using the TOTAL command. 3. The plate is simply supported on the bottom plate edges only (not at the midplane). 4. Three rigid body modes are correctly predicted in every test case analyzed. 5. The level of error introduced by mesh discretization is small compared to the level of error introduced
by an insufficient number of master degrees of freedom. 6. For the primary bending mode (mode 4), both SOLID45 and SOLID92 accurately predict the eigenvalue
with only two percent of the...
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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.
- Spring '09
- The Land