Analytical treatment of the transient motion of inertial beams attached to coupling inertial resonators

Nieves, M.J.; Carta, G.

Abstract

This paper presents, for the first time, an analytical formulation to determine the transient response of an elastic beam possessing distributed inertia and connected to a coupling inertial resonator, represented by a gyroscopic spinner. The latter couples the transverse displacement components of the beam in the two perpendicular directions, thus producing roto-flexural vibrations. A detailed parametric study is presented that illustrates the effects of the beam’s distributed inertia and of the resonator’s characteristics. The limit case of massless beam is examined and it is shown that in some situations the distributed inertia in the beam should not be neglected. Analytical results are also validated by finite element computations. An illustration is also presented that demonstrates the effectiveness of using the considered inertial devices to mitigate hazardous vibrations in structural systems. It is envisaged that this paper may be useful in the analysis of flexural waveguides and metamaterials consisting of inertial elastic beam elements.

Citation

Nieves, M., & Carta, G. (2021). Analytical treatment of the transient motion of inertial beams attached to coupling inertial resonators. Journal of Engineering Mathematics, 127, Article 20. https://doi.org/10.1007/s10665-021-10110-w

• Journal Article Type: Article
• Acceptance Date: Feb 13, 2021
• Publication Date: Mar 20, 2021
• Journal: Journal of Engineering Mathematics
• Print ISSN: 0022-0833
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 127
• Article Number: 20
• DOI: https://doi.org/10.1007/s10665-021-10110-w
• Keywords: Flexural waves, Transient analysis, Inertial resonator, Gyroscopic spinner, Vibration isolation
• Publisher URL: http://doi.org/10.1007/s10665-021-10110-w