Multi-scale dynamics of particle dampers using wavelets: Extracting particle activity metrics from ring down experiments

Gnanasambandham, C; Stender, M; Hoffmann, N; Eberhard, P

Multi-scale dynamics of particle dampers using wavelets: Extracting particle activity metrics from ring down experiments

Gnanasambandham, C Stender, M

Hoffmann, N Eberhard, P

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Publisher:: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Journal of Sound and Vibration, 2019, 454, pp. 1-13
Issue Date:: 2019-08-18

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Field	Value	Language
dc.contributor.author	Gnanasambandham, C
dc.contributor.author	Stender, M https://orcid.org/0000-0002-0888-8206
dc.contributor.author	Hoffmann, N
dc.contributor.author	Eberhard, P
dc.date.accessioned	2020-04-29T06:31:40Z
dc.date.available	2020-04-29T06:31:40Z
dc.date.issued	2019-08-18
dc.identifier.citation	Journal of Sound and Vibration, 2019, 454, pp. 1-13
dc.identifier.issn	0022-460X
dc.identifier.issn	1095-8568
dc.identifier.uri	http://hdl.handle.net/10453/140326
dc.description.abstract	© 2019 Elsevier Ltd In this work, the concept of temporal multi-scale analysis is applied to particle damper (PD)systems in order to characterize their damping performance. For this purpose discrete wavelet transform (DWT)is used to separate the dynamics on different scales contained in univariate time-series data. These data are generated from classical ring-down experiments of a vibrating leaf spring damped by a PD. The analysis reveals the presence of micro fluctuations, which are structural vibrations induced by solid particle activity, superimposed onto the first modes of the structure. In order to quantify the degree of relative motion present, a particle activity metric is introduced based on the fast and slow dynamics separated by the DWT. A physical interpretation of the solid particle activity metric is provided using discrete element method (DEM)simulations. The particle activity based dissipation metric is compared with classical dissipation metrics and shows good agreement. Hence, the proposed methodology allows for characterizing PD systems by signal processing of classical vibration data that can be gathered at low costs. In a case study, the effect of container length and the presence of an added liquid in the container on the solid particle activity is studied. Higher levels of solid particle activity are observed for the case where the damper is filled with both solid particles and liquid fillings compared to the purely solid particle case.
dc.language	English
dc.publisher	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
dc.relation.ispartof	Journal of Sound and Vibration
dc.relation.isbasedon	10.1016/j.jsv.2019.04.009
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	02 Physical Sciences, 09 Engineering
dc.subject.classification	Acoustics
dc.title	Multi-scale dynamics of particle dampers using wavelets: Extracting particle activity metrics from ring down experiments
dc.type	Journal Article
utslib.citation.volume	454
utslib.for	02 Physical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
dc.date.updated	2020-04-29T06:31:38Z
pubs.publication-status	Published
pubs.volume	454
utslib.start-page	1

Abstract:

© 2019 Elsevier Ltd In this work, the concept of temporal multi-scale analysis is applied to particle damper (PD)systems in order to characterize their damping performance. For this purpose discrete wavelet transform (DWT)is used to separate the dynamics on different scales contained in univariate time-series data. These data are generated from classical ring-down experiments of a vibrating leaf spring damped by a PD. The analysis reveals the presence of micro fluctuations, which are structural vibrations induced by solid particle activity, superimposed onto the first modes of the structure. In order to quantify the degree of relative motion present, a particle activity metric is introduced based on the fast and slow dynamics separated by the DWT. A physical interpretation of the solid particle activity metric is provided using discrete element method (DEM)simulations. The particle activity based dissipation metric is compared with classical dissipation metrics and shows good agreement. Hence, the proposed methodology allows for characterizing PD systems by signal processing of classical vibration data that can be gathered at low costs. In a case study, the effect of container length and the presence of an added liquid in the container on the solid particle activity is studied. Higher levels of solid particle activity are observed for the case where the damper is filled with both solid particles and liquid fillings compared to the purely solid particle case.

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http://hdl.handle.net/10453/140326