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

Publication Date


Document Type


Department, Program, or Center

Mechanical Engineering (KGCOE)


Budynas, Robert

Advisor/Committee Member

Garson, Guillermo

Advisor/Committee Member

Torok, J.


Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: QA193 .K743 1990


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