Vibration mitigation of an MDoF system subjected to stochastic loading by means of hysteretic nonlinear locally resonant metamaterials

Abstract In this paper, we intend to mitigate absolute accelerations and displacements in the low-frequency regime of multiple-degrees-of-freedom fuel storage tanks subjected to stochastic seismic excitations. Therefore, we propose to optimize a finite locally resonant metafoundation equipped with m...

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Autores principales:	Francesco Basone, Oreste S. Bursi, Fabrizio Aloschi, Günter Fischbach
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/56120d6c61294134976cae9c07cb9450
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spelling	oai:doaj.org-article:56120d6c61294134976cae9c07cb94502021-12-02T15:38:23ZVibration mitigation of an MDoF system subjected to stochastic loading by means of hysteretic nonlinear locally resonant metamaterials10.1038/s41598-021-88984-02045-2322https://doaj.org/article/56120d6c61294134976cae9c07cb94502021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88984-0https://doaj.org/toc/2045-2322Abstract In this paper, we intend to mitigate absolute accelerations and displacements in the low-frequency regime of multiple-degrees-of-freedom fuel storage tanks subjected to stochastic seismic excitations. Therefore, we propose to optimize a finite locally resonant metafoundation equipped with massive resonators and fully nonlinear hysteretic devices. The optimization process takes into account the stochastic nature of seismic records in the stationary frequency domain; the records are modelled with the power spectral density S0 and modified with a Kanai–Tajimi filter. Moreover, the massive superstructure of a fuel storage tank is also considered in the optimization procedure. To optimize the nonlinear behaviour of dampers, we use a Bouc–Wen hysteretic model; the relevant nonlinear differential equations are reduced to a system of linear equations through the stochastic equivalent linearization technique. The optimized system is successively verified against natural seismic records by means of nonlinear transient time history analyses. Finally, we determine the dispersion relations for the relevant periodic metafoundation.Francesco BasoneOreste S. BursiFabrizio AloschiGünter FischbachNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Francesco Basone Oreste S. Bursi Fabrizio Aloschi Günter Fischbach Vibration mitigation of an MDoF system subjected to stochastic loading by means of hysteretic nonlinear locally resonant metamaterials
description	Abstract In this paper, we intend to mitigate absolute accelerations and displacements in the low-frequency regime of multiple-degrees-of-freedom fuel storage tanks subjected to stochastic seismic excitations. Therefore, we propose to optimize a finite locally resonant metafoundation equipped with massive resonators and fully nonlinear hysteretic devices. The optimization process takes into account the stochastic nature of seismic records in the stationary frequency domain; the records are modelled with the power spectral density S0 and modified with a Kanai–Tajimi filter. Moreover, the massive superstructure of a fuel storage tank is also considered in the optimization procedure. To optimize the nonlinear behaviour of dampers, we use a Bouc–Wen hysteretic model; the relevant nonlinear differential equations are reduced to a system of linear equations through the stochastic equivalent linearization technique. The optimized system is successively verified against natural seismic records by means of nonlinear transient time history analyses. Finally, we determine the dispersion relations for the relevant periodic metafoundation.
format	article
author	Francesco Basone Oreste S. Bursi Fabrizio Aloschi Günter Fischbach
author_facet	Francesco Basone Oreste S. Bursi Fabrizio Aloschi Günter Fischbach
author_sort	Francesco Basone
title	Vibration mitigation of an MDoF system subjected to stochastic loading by means of hysteretic nonlinear locally resonant metamaterials
title_short	Vibration mitigation of an MDoF system subjected to stochastic loading by means of hysteretic nonlinear locally resonant metamaterials
title_full	Vibration mitigation of an MDoF system subjected to stochastic loading by means of hysteretic nonlinear locally resonant metamaterials
title_fullStr	Vibration mitigation of an MDoF system subjected to stochastic loading by means of hysteretic nonlinear locally resonant metamaterials
title_full_unstemmed	Vibration mitigation of an MDoF system subjected to stochastic loading by means of hysteretic nonlinear locally resonant metamaterials
title_sort	vibration mitigation of an mdof system subjected to stochastic loading by means of hysteretic nonlinear locally resonant metamaterials
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/56120d6c61294134976cae9c07cb9450
work_keys_str_mv	AT francescobasone vibrationmitigationofanmdofsystemsubjectedtostochasticloadingbymeansofhystereticnonlinearlocallyresonantmetamaterials AT orestesbursi vibrationmitigationofanmdofsystemsubjectedtostochasticloadingbymeansofhystereticnonlinearlocallyresonantmetamaterials AT fabrizioaloschi vibrationmitigationofanmdofsystemsubjectedtostochasticloadingbymeansofhystereticnonlinearlocallyresonantmetamaterials AT gunterfischbach vibrationmitigationofanmdofsystemsubjectedtostochasticloadingbymeansofhystereticnonlinearlocallyresonantmetamaterials
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Vibration mitigation of an MDoF system subjected to stochastic loading by means of hysteretic nonlinear locally resonant metamaterials

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