Vibrational energy flow cancelling by loading a reverse excitation: Visualization and analysis

Vibration control is a permanent and significant issue in all forms of structural dynamic analysis with the consistent objective being to minimize vibration levels. Considering that the propagation of vibration waves is essentially the transmission of vibrational energy flow (VEF), the fundamental r...

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Autores principales:	Yingqun Ma, Qingjun Zhao, Wei Zhao, Long Hao, Binbin Liu
Formato:	article
Lenguaje:	EN
Publicado:	SAGE Publishing 2021
Materias:	Control engineering systems. Automatic machinery (General) TJ212-225 Acoustics. Sound QC221-246
Acceso en línea:	https://doaj.org/article/fb4c4b18a2ad43ec8817f86053a54ab3
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spelling	oai:doaj.org-article:fb4c4b18a2ad43ec8817f86053a54ab32021-12-02T02:33:53ZVibrational energy flow cancelling by loading a reverse excitation: Visualization and analysis1461-34842048-404610.1177/14613484211024475https://doaj.org/article/fb4c4b18a2ad43ec8817f86053a54ab32021-12-01T00:00:00Zhttps://doi.org/10.1177/14613484211024475https://doaj.org/toc/1461-3484https://doaj.org/toc/2048-4046Vibration control is a permanent and significant issue in all forms of structural dynamic analysis with the consistent objective being to minimize vibration levels. Considering that the propagation of vibration waves is essentially the transmission of vibrational energy flow (VEF), the fundamental requirement, therefore, is to minimize the VEF transmitted from sources to sinks and then to control and block the flow of vibration energy. Structural intensity (SI) method, combining forces with velocities to assess the magnitude and directions of VEF, is alternative to classical dynamic assessment methods offering insight into the transmission of VEF and studying additional phenomena which cannot be obtained by conventional dynamic analysis. In the field of noise, active noise control has been widely used in vehicles and headphones, which has achieved remarkable results by introducing a cancelling ‘anti-noise’ wave through an appropriate array of secondary sources. Analogically, it is considered whether the vibration of the structure can be attenuated by introducing a secondary reverse excitation (SRE) to offset the VEF transmitted in the structure. Therefore, this article combines the SI method and SRE to carry out related research on this issue. The rectangular plate with the circular hole subjected to the transient sinusoidal force, being widely used and found in various engineering branches, is taken as the research object. The developed simulation system consisting of the finite element tool and the in-house program is used to assess and visualize the instantaneous SI fields. The effects of the SRE acting on this structure on the transmission behaviours of VEF and the vibration suppression have been investigated in detail. Moreover, the transmission, conversion and balance relationships of the VEF have been derived from the general equation of motion and analysed as well. This study sheds new light on the vibration attenuation by introducing the secondary source from the perspective of VEF.Yingqun MaQingjun ZhaoWei ZhaoLong HaoBinbin LiuSAGE PublishingarticleControl engineering systems. Automatic machinery (General)TJ212-225Acoustics. SoundQC221-246ENJournal of Low Frequency Noise, Vibration and Active Control, Vol 40 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Control engineering systems. Automatic machinery (General) TJ212-225 Acoustics. Sound QC221-246
spellingShingle	Control engineering systems. Automatic machinery (General) TJ212-225 Acoustics. Sound QC221-246 Yingqun Ma Qingjun Zhao Wei Zhao Long Hao Binbin Liu Vibrational energy flow cancelling by loading a reverse excitation: Visualization and analysis
description	Vibration control is a permanent and significant issue in all forms of structural dynamic analysis with the consistent objective being to minimize vibration levels. Considering that the propagation of vibration waves is essentially the transmission of vibrational energy flow (VEF), the fundamental requirement, therefore, is to minimize the VEF transmitted from sources to sinks and then to control and block the flow of vibration energy. Structural intensity (SI) method, combining forces with velocities to assess the magnitude and directions of VEF, is alternative to classical dynamic assessment methods offering insight into the transmission of VEF and studying additional phenomena which cannot be obtained by conventional dynamic analysis. In the field of noise, active noise control has been widely used in vehicles and headphones, which has achieved remarkable results by introducing a cancelling ‘anti-noise’ wave through an appropriate array of secondary sources. Analogically, it is considered whether the vibration of the structure can be attenuated by introducing a secondary reverse excitation (SRE) to offset the VEF transmitted in the structure. Therefore, this article combines the SI method and SRE to carry out related research on this issue. The rectangular plate with the circular hole subjected to the transient sinusoidal force, being widely used and found in various engineering branches, is taken as the research object. The developed simulation system consisting of the finite element tool and the in-house program is used to assess and visualize the instantaneous SI fields. The effects of the SRE acting on this structure on the transmission behaviours of VEF and the vibration suppression have been investigated in detail. Moreover, the transmission, conversion and balance relationships of the VEF have been derived from the general equation of motion and analysed as well. This study sheds new light on the vibration attenuation by introducing the secondary source from the perspective of VEF.
format	article
author	Yingqun Ma Qingjun Zhao Wei Zhao Long Hao Binbin Liu
author_facet	Yingqun Ma Qingjun Zhao Wei Zhao Long Hao Binbin Liu
author_sort	Yingqun Ma
title	Vibrational energy flow cancelling by loading a reverse excitation: Visualization and analysis
title_short	Vibrational energy flow cancelling by loading a reverse excitation: Visualization and analysis
title_full	Vibrational energy flow cancelling by loading a reverse excitation: Visualization and analysis
title_fullStr	Vibrational energy flow cancelling by loading a reverse excitation: Visualization and analysis
title_full_unstemmed	Vibrational energy flow cancelling by loading a reverse excitation: Visualization and analysis
title_sort	vibrational energy flow cancelling by loading a reverse excitation: visualization and analysis
publisher	SAGE Publishing
publishDate	2021
url	https://doaj.org/article/fb4c4b18a2ad43ec8817f86053a54ab3
work_keys_str_mv	AT yingqunma vibrationalenergyflowcancellingbyloadingareverseexcitationvisualizationandanalysis AT qingjunzhao vibrationalenergyflowcancellingbyloadingareverseexcitationvisualizationandanalysis AT weizhao vibrationalenergyflowcancellingbyloadingareverseexcitationvisualizationandanalysis AT longhao vibrationalenergyflowcancellingbyloadingareverseexcitationvisualizationandanalysis AT binbinliu vibrationalenergyflowcancellingbyloadingareverseexcitationvisualizationandanalysis
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Vibrational energy flow cancelling by loading a reverse excitation: Visualization and analysis

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