Prediction of the VIV Responses Based on the Numerical Solutions of Controlled Motion

The study of forced and free vibration of a cylinder has long been isolated. The internal relationship between free vibration and forced vibration has rarely been investigated. In this paper, the relationship between the forced and free vibration of a cylinder was established. A series of numerical...

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Autores principales:	Duanmu Yu, Chen Jianping, Chen Yizhong
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/7d3562d8b84b459caa8eb8f6d5952f63
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spelling	oai:doaj.org-article:7d3562d8b84b459caa8eb8f6d5952f632021-11-22T01:09:52ZPrediction of the VIV Responses Based on the Numerical Solutions of Controlled Motion1875-920310.1155/2021/2774070https://doaj.org/article/7d3562d8b84b459caa8eb8f6d5952f632021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/2774070https://doaj.org/toc/1875-9203The study of forced and free vibration of a cylinder has long been isolated. The internal relationship between free vibration and forced vibration has rarely been investigated. In this paper, the relationship between the forced and free vibration of a cylinder was established. A series of numerical simulations of a cylinder undergoing forced oscillations at a wide range of vibration amplitudes and frequencies were carried out, with the flow solver viv-FOAM-SJTU developed based on the open-source platform OpenFOAM. Complex demodulation analysis was conducted to quantify the spatial-temporal phase relationship between the forces and the displacement of the cylinder. It was found that, at some particular oscillating amplitudes and frequencies, the phase angle switched between positive and negative values, which corresponds to a vortex mode transferring from the 2P mode to the 2PO mode. This distinct new mode “2PO” was closely related to the intermittent jumping between lower and upper branches of the amplitude responses of VIV. A prediction model was developed to obtain the VIV amplitude responses based on the numerical results of forced oscillation. The prediction results of three points located separately in the initial, upper, and lower branches of VIV agreed well with experimental measurements of an elastically mounted cylinder. This prediction model was thus expected to be suitable for predicting the response of VIV.Duanmu YuChen JianpingChen YizhongHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Duanmu Yu Chen Jianping Chen Yizhong Prediction of the VIV Responses Based on the Numerical Solutions of Controlled Motion
description	The study of forced and free vibration of a cylinder has long been isolated. The internal relationship between free vibration and forced vibration has rarely been investigated. In this paper, the relationship between the forced and free vibration of a cylinder was established. A series of numerical simulations of a cylinder undergoing forced oscillations at a wide range of vibration amplitudes and frequencies were carried out, with the flow solver viv-FOAM-SJTU developed based on the open-source platform OpenFOAM. Complex demodulation analysis was conducted to quantify the spatial-temporal phase relationship between the forces and the displacement of the cylinder. It was found that, at some particular oscillating amplitudes and frequencies, the phase angle switched between positive and negative values, which corresponds to a vortex mode transferring from the 2P mode to the 2PO mode. This distinct new mode “2PO” was closely related to the intermittent jumping between lower and upper branches of the amplitude responses of VIV. A prediction model was developed to obtain the VIV amplitude responses based on the numerical results of forced oscillation. The prediction results of three points located separately in the initial, upper, and lower branches of VIV agreed well with experimental measurements of an elastically mounted cylinder. This prediction model was thus expected to be suitable for predicting the response of VIV.
format	article
author	Duanmu Yu Chen Jianping Chen Yizhong
author_facet	Duanmu Yu Chen Jianping Chen Yizhong
author_sort	Duanmu Yu
title	Prediction of the VIV Responses Based on the Numerical Solutions of Controlled Motion
title_short	Prediction of the VIV Responses Based on the Numerical Solutions of Controlled Motion
title_full	Prediction of the VIV Responses Based on the Numerical Solutions of Controlled Motion
title_fullStr	Prediction of the VIV Responses Based on the Numerical Solutions of Controlled Motion
title_full_unstemmed	Prediction of the VIV Responses Based on the Numerical Solutions of Controlled Motion
title_sort	prediction of the viv responses based on the numerical solutions of controlled motion
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/7d3562d8b84b459caa8eb8f6d5952f63
work_keys_str_mv	AT duanmuyu predictionofthevivresponsesbasedonthenumericalsolutionsofcontrolledmotion AT chenjianping predictionofthevivresponsesbasedonthenumericalsolutionsofcontrolledmotion AT chenyizhong predictionofthevivresponsesbasedonthenumericalsolutionsofcontrolledmotion
_version_	1718418408982183936

Prediction of the VIV Responses Based on the Numerical Solutions of Controlled Motion

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