Linear modal analysis of L-shaped beam structures

Georgiades, Fotios, Warminski, Jerzy and Cartmell, Matthew, P. (2013) Linear modal analysis of L-shaped beam structures. Mechanical Systems and Signal Processing, 38 (2). pp. 312-332. ISSN 0888-3270

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In this article a theoretical linear modal analysis of Euler-Bernoulli L-shaped beam structures is performed by solving two sets of coupled partial differential equations of motion. The first set, with two equations, corresponds to in-plane bending motions whilst the second set with four equations corresponds to out-of-plane motions with bending and torsion. The case is also shown of a single cantilever beam taking into account rotary inertia terms. At first for the case of examination of the results for the L-shaped beam structure, an individual modal analysis is presented for four selected beams which will be used for modelling an L-shaped beam structure; in order to investigate the influence of rotary inertia terms and shear effects. Then, a theoretical and numerical modal analysis is performed for four models of the L-shaped beam structure consisting of two sets of beams, in order to examine the effect of the orientation of the secondary beam (oriented in two ways) and also shear effects. The comparison of theoretical and finite element simulations shows a good agreement for both in-plane and out-of-plane motions, which validates the theoretical analysis. This work is essential to make progress with new investigations into the nonlinear equations for the L-shaped beam structures within Nonlinear Normal Mode theory.

Additional Information:Available online 13 March 2013
Keywords:L-shaped beam structure, modal analysis, elastic continua dynamics, Euler-Bernoulli beams, Autoparametric structure, Georgiadis
Subjects:H Engineering > H142 Solid Mechanics
H Engineering > H310 Dynamics
H Engineering > H210 Structural Engineering
H Engineering > H143 Structural Mechanics
H Engineering > H342 Vibration
H Engineering > H140 Mechanics
H Engineering > H300 Mechanical Engineering
Divisions:College of Science > School of Engineering
ID Code:9462
Deposited On:15 May 2013 12:48

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