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Unformatted text preview: raction Method Model Information N1 = 5 DOF = 1296 N2 = 32 Quadrilateral Elements Element = SHELL63 No. Elements = 160 Householder Extraction Frequency Ratio MDOF[1] 1 2 3 4 5 6 7 8 9 CPU Ratio[2] 2P 1.026 1.072 1.195 1.158 1.347 1.165 1.321 1.452 1.498 .55 4P 1.011 1.027 1.066 1.064 1.082 1.072 1.079 1.099 1.117 .596 8P 1.007 1.015 1.015 1.001 1.005 1.017 0.995 0.998 1.041 .677 1. Master degrees of freedoms based on multiples of P = 9 eigenvectors. 2. Computing time CPU is normalized to a solution using the Subspace Extraction Assumptions, Modeling Notes, and Solution Comments 1. The problem is designed to test a solution involving repeated eigenvalues and the use of various eigenvalue extraction techniques. 2. The representative input data listing is for a subspace extraction analysis. Modifications to the input data are required to execute a Householder extraction analysis. 3. For the linear elements, SHELL63 shows better solution results than SHELL43. These results are consistent with other simila...
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