Proposal and numerical feasibility study of a novel multi-modal and multi-axis dynamic vibration absorber consists of spherical viscoelastic material containing embedded ball-like mass

This paper proposes a novel DVA (Dynamic Vibration Absorber) consisting of a ball-like mass embedded in a spherical viscoelastic material to meet practical demands for the multi-modal and multi-axis vibration reduction against elastic vibrations of structures. This DVA is called eMDVA (embedded Mass...

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Autores principales:	Takahiro TOMIOKA, Keiya HIGUCHI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2021
Materias:	dynamic vibration absorber elastic vibration ride comfort mutli-axis damping multi-modal damping viscoelastic material Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/d0b10bc9582d42c0b3f06abd18122c4f
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spelling	oai:doaj.org-article:d0b10bc9582d42c0b3f06abd18122c4f2021-11-29T06:09:59ZProposal and numerical feasibility study of a novel multi-modal and multi-axis dynamic vibration absorber consists of spherical viscoelastic material containing embedded ball-like mass2187-974510.1299/mej.21-00145https://doaj.org/article/d0b10bc9582d42c0b3f06abd18122c4f2021-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/8/4/8_21-00145/_pdf/-char/enhttps://doaj.org/toc/2187-9745This paper proposes a novel DVA (Dynamic Vibration Absorber) consisting of a ball-like mass embedded in a spherical viscoelastic material to meet practical demands for the multi-modal and multi-axis vibration reduction against elastic vibrations of structures. This DVA is called eMDVA (embedded Mass DVA) here, and the embedded mass can vibrate every direction in the viscoelastic medium. The unique concept of the eMDVA is inspired by the damping effect caused by passengers on railway vehicles. This paper describes a basic configuration of the eMDVA and some numerical studies using finite element (FE) vibration analysis to design the eMDVA. From the numerical investigation, it has been found that the natural frequency of a single-mass eMDVA can be controlled by changing the combination of the sizes of the viscoelastic sphere and the embedded mass. The frequency response function (FRF) of the acceleration of the embedded mass versus excitation force has a dominant single peak corresponding to one of the natural frequencies. These results indicate that the proposed eMDVA is suitable as a DVA, and it can be designed to tune the target vibration frequencies of host structures. As a more realistic analysis, numerical investigation for the thin and long plate-like host structure (a 1:10 scale model of the floor structure of a railway vehicle) was conducted, and multi-modal vibration reduction has been observed by applying the eMDVA consisting of two sets of viscoelastic spheres and embedded masses with different sizes. From these numerical investigations, it has been shown that the proposed eMDVA has promising potential as a multi-modal damper for elastic vibrations.Takahiro TOMIOKAKeiya HIGUCHIThe Japan Society of Mechanical Engineersarticledynamic vibration absorberelastic vibrationride comfortmutli-axis dampingmulti-modal dampingviscoelastic materialMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 8, Iss 4, Pp 21-00145-21-00145 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dynamic vibration absorber elastic vibration ride comfort mutli-axis damping multi-modal damping viscoelastic material Mechanical engineering and machinery TJ1-1570
spellingShingle	dynamic vibration absorber elastic vibration ride comfort mutli-axis damping multi-modal damping viscoelastic material Mechanical engineering and machinery TJ1-1570 Takahiro TOMIOKA Keiya HIGUCHI Proposal and numerical feasibility study of a novel multi-modal and multi-axis dynamic vibration absorber consists of spherical viscoelastic material containing embedded ball-like mass
description	This paper proposes a novel DVA (Dynamic Vibration Absorber) consisting of a ball-like mass embedded in a spherical viscoelastic material to meet practical demands for the multi-modal and multi-axis vibration reduction against elastic vibrations of structures. This DVA is called eMDVA (embedded Mass DVA) here, and the embedded mass can vibrate every direction in the viscoelastic medium. The unique concept of the eMDVA is inspired by the damping effect caused by passengers on railway vehicles. This paper describes a basic configuration of the eMDVA and some numerical studies using finite element (FE) vibration analysis to design the eMDVA. From the numerical investigation, it has been found that the natural frequency of a single-mass eMDVA can be controlled by changing the combination of the sizes of the viscoelastic sphere and the embedded mass. The frequency response function (FRF) of the acceleration of the embedded mass versus excitation force has a dominant single peak corresponding to one of the natural frequencies. These results indicate that the proposed eMDVA is suitable as a DVA, and it can be designed to tune the target vibration frequencies of host structures. As a more realistic analysis, numerical investigation for the thin and long plate-like host structure (a 1:10 scale model of the floor structure of a railway vehicle) was conducted, and multi-modal vibration reduction has been observed by applying the eMDVA consisting of two sets of viscoelastic spheres and embedded masses with different sizes. From these numerical investigations, it has been shown that the proposed eMDVA has promising potential as a multi-modal damper for elastic vibrations.
format	article
author	Takahiro TOMIOKA Keiya HIGUCHI
author_facet	Takahiro TOMIOKA Keiya HIGUCHI
author_sort	Takahiro TOMIOKA
title	Proposal and numerical feasibility study of a novel multi-modal and multi-axis dynamic vibration absorber consists of spherical viscoelastic material containing embedded ball-like mass
title_short	Proposal and numerical feasibility study of a novel multi-modal and multi-axis dynamic vibration absorber consists of spherical viscoelastic material containing embedded ball-like mass
title_full	Proposal and numerical feasibility study of a novel multi-modal and multi-axis dynamic vibration absorber consists of spherical viscoelastic material containing embedded ball-like mass
title_fullStr	Proposal and numerical feasibility study of a novel multi-modal and multi-axis dynamic vibration absorber consists of spherical viscoelastic material containing embedded ball-like mass
title_full_unstemmed	Proposal and numerical feasibility study of a novel multi-modal and multi-axis dynamic vibration absorber consists of spherical viscoelastic material containing embedded ball-like mass
title_sort	proposal and numerical feasibility study of a novel multi-modal and multi-axis dynamic vibration absorber consists of spherical viscoelastic material containing embedded ball-like mass
publisher	The Japan Society of Mechanical Engineers
publishDate	2021
url	https://doaj.org/article/d0b10bc9582d42c0b3f06abd18122c4f
work_keys_str_mv	AT takahirotomioka proposalandnumericalfeasibilitystudyofanovelmultimodalandmultiaxisdynamicvibrationabsorberconsistsofsphericalviscoelasticmaterialcontainingembeddedballlikemass AT keiyahiguchi proposalandnumericalfeasibilitystudyofanovelmultimodalandmultiaxisdynamicvibrationabsorberconsistsofsphericalviscoelasticmaterialcontainingembeddedballlikemass
_version_	1718407613386850304

Proposal and numerical feasibility study of a novel multi-modal and multi-axis dynamic vibration absorber consists of spherical viscoelastic material containing embedded ball-like mass

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