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RESEARCH PAPERS

On the Dynamics of Flexible Beams Under Large Overall Motions—The Plane Case: Part I

[+] Author and Article Information
J. C. Simo

Applied Mechanics Division, Stanford University, Stanford, CA 94305

L. Vu-Quoc

Structural Engineering and Structural Mechanics Division, University of California, Berkeley, CA 94720

J. Appl. Mech 53(4), 849-854 (Dec 01, 1986) (6 pages) doi:10.1115/1.3171870 History: Received September 23, 1985; Revised May 07, 1986; Online July 21, 2009

Abstract

The dynamic response of a flexible beam subject to large overall motions is traditionally formulated relative to a floating frame, sometimes referred to as the shadow beam . This type of formulation leads to equations of motion of the form g̃(ẏ, y, t) = 0 , that are implicit, nonlinear and highly coupled in the inertia terms. An alternative approach is proposed whereby all quantities are referred to the inertial frame. As a result, the inertia term enters linearly in the formulation simply as mass times acceleration. Crucial to this formulation is the use of finite strain rod theories capable of treating finite rotations. Numerical examples that involve finite vibrations coupled with large overall motions are presented in Part II of this paper.

Copyright © 1986 by ASME
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