A technique for correlating a complex structure's finite element eigenvectors with its respective experimental eigenvectors is presented. The technique provides a quantitative comparison of the finite element and experimental eigenvectors by using a reduced finite element mass matrix in a "cross" orthogonality check. Comparisons of two case studies are presented: a thin plate with motion in the Z-direction only and a 3-dimensional table structure with motion in three principal coordinate directions . Along with the orthogonality check, the difference in the eigenvectors is computed and shown graphically. The orthogonality check between the finite element and experimental eigenvectors can serve as a means to verify the accuracy of the finite element model.
Library of Congress Subject Headings
Eigenvectors; Finite element method; Mechanics, Applied--Mathematics
Department, Program, or Center
Mechanical Engineering (KGCOE)
Krebs, Derek J., "Correlation of finite element and experimental eigenvectors" (1990). Thesis. Rochester Institute of Technology. Accessed from
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