Doctoral Dissertations


"The dynamic behavior of eccentrically stiffened rectangular plates is studied by the finite element method. The addition of stiffeners to a plate structure is a common method of increasing the rigidity of the structure with a minimum of weight increase. However, this stiffened plate configuration does not easily lend itself to analysis. This study is an approach to finding a rational method by which the dynamic behavior of such a stiffened plate structure may be determined. The governing differential equations for the finite element model are derived and the stiffness and mass matrices for the plate and stiffener elements are presented in terms of the element properties. A comparison of the natural frequencies and mode shapes of a series of finite element models is made with those obtained from tests conducted on square, aluminum, stiffened plates. Also included is the computer program from which the frequencies of the finite element model were determined, along with the input and output data corresponding to one of the test problems. Some difficulties were encountered in matching the finite element model boundary conditions with the test plate supports. Where boundary conditions were matched successfully, the finite element model and test plate values of the lower natural frequencies were in close agreement. Other general trends of stiffened plate behavior which became evident from the test plate data were also predicted by the finite element computer program. Results were also obtained which compare favorably with those reported elsewhere in the literature"--Abstract, pages iii-iv.


Senne, Joseph H.

Committee Member(s)

Cunningham, Floyd M.
Best, John, 1925-2015
Gillett, Billy E.
Hansen, Peter G., 1927-2010
Andrews, William A., 1922-2009


Civil, Architectural and Environmental Engineering

Degree Name

Ph. D. in Civil Engineering


National Defense and Education Act Title IV Fellowship


University of Missouri--Rolla

Publication Date



x, 172 pages

Note about bibliography

Includes bibliographical references (pages 50-51).


© 1971 Charles Stuart Ferrell, All rights reserved.

Document Type

Dissertation - Open Access

File Type




Subject Headings

Structural analysis (Engineering) -- Computer programs
Strains and stresses -- Mathematical models
Finite element method
Engineering -- Mathematical models

Thesis Number

T 2606

Print OCLC #


Electronic OCLC #