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Shock and Vibration
Volume 2014, Article ID 768209, 12 pages
http://dx.doi.org/10.1155/2014/768209
Research Article

Dynamic Analysis of a Timoshenko Beam Subjected to an Accelerating Mass Using Spectral Element Method

College of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China

Received 27 October 2012; Accepted 28 April 2013; Published 27 February 2014

Academic Editor: Reza Jazar

Copyright © 2014 Guangsong Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents formulations for a Timoshenko beam subjected to an accelerating mass using spectral element method in time domain (TSEM). Vertical displacement and bending rotation of the beam were interpolated by Lagrange polynomials supported on the Gauss-Lobatto-Legendre (GLL) points. By using GLL integration rule, the mass matrix was diagonal and the dynamic responses can be obtained efficiently and accurately. The results were compared with those obtained in the literature to verify the correctness. The variation of the vibration frequencies of the Timoshenko and moving mass system was researched. The effects of inertial force, centrifugal force, Coriolis force, and tangential force on a Timoshenko beam subjected to an accelerating mass were investigated.