Non-linear transverse vibrations and 3:1 internal resonances of a tensioned beam on multiple supports

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Abstract

In this study, nonlinear transverse vibrations of a tensioned Euler-Bernoulli beam resting on multiple supports are investigated. The immovable end conditions due to simple supports cause stretching of neutral axis and introduce cubic nonlinearity to the equations of motion. Forcing and damping effects are included in the analysis. The general arbitrary number of support case is investigated and 3, 4, and 5 support cases analyzed in detail. A perturbation technique (the method of multiple scales) is applied to the equations of motion to obtain approximate analytical solutions. 3:1 internal resonance case is also considered. Natural frequencies and mode shapes for the linear problem are found for the tensioned beam. Nonlinear frequencies are calculated; amplitude and phase modulation figures are presented for different forcing and damping cases. Frequency-response and force-response curves are drawn. Different internal resonance cases between modes are investigated. © Association for Scientific Research.

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Baǧdatli, S. M., Öz, H. R., & Özkaya, E. (2011). Non-linear transverse vibrations and 3:1 internal resonances of a tensioned beam on multiple supports. Mathematical and Computational Applications, 16(1), 203–215. https://doi.org/10.3390/mca16010203

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