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Finite contact duration modeling of a Vibro-Impact Nonlinear Energy Sink to protect a civil engineering frame structure against seismic events

Abstract : This paper proposes a finite contact duration model of a Vibro-Impact Nonlinear Energy Sink (VI NES) for controlling the vibrations of a civil engineering frame structure under seismic input. The device is composed of a container enclosing an inelastic sphere, interacting via a nonlinear viscoelastic dissipative force with the inner walls of the container. As the structure vibrates, the particle bounces within the container, exploring dynamical regimes ranging from periodic collisions to chaos and dissipating energy. Our VI NES is optimized for the El Centro NS (1940) earthquake signal, and its effectiveness in reducing the dynamic response of a ten-story frame structure is investigated. It is also compared with a classical TMD optimized according to the Den Hartog criterion. The main result is that the performance of the VI NES in reducing the top floor maximum displacement is very satisfying. Moreover, sensitivity analyses reveal good robustness of the VI NES to initial conditions and to variations in the properties of the primary structure.
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https://hal.archives-ouvertes.fr/hal-03039033
Contributor : Stefania Lo Feudo Connect in order to contact the contributor
Submitted on : Thursday, March 24, 2022 - 9:47:08 AM
Last modification on : Wednesday, May 4, 2022 - 10:08:02 AM

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  • HAL Id : hal-03039033, version 2

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Stefania Lo Feudo, Stéphane Job, Miriam Cavallo, Aguinaldo Fraddosio, Mario Daniele Piccioni, et al.. Finite contact duration modeling of a Vibro-Impact Nonlinear Energy Sink to protect a civil engineering frame structure against seismic events. 2020. ⟨hal-03039033v2⟩

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