Effects of Running Speed on Coupling between Pantograph of High-Speed Train and Tunnel Based on Aerodynamics and Multi-Body Dynamics Coupling

(1) Background: The ratio of railway tunnel to line is larger, which produces tunnel entrance and exit effect, aerodynamic resistance, and sudden pressure changes. When the train passes through the tunnels at high-speed, the interaction between the pantograph on it and its surrounding air intensifie...

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Autores principales:	Zhanling Ji, Yi Guo, Dilong Guo, Guowei Yang, Yubiao Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	coupling effect between pantograph and tunnel high-speed pantograph high-speed train running speed coupled aerodynamics and multi-body dynamics passing through a tunnel Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/d20592baf7954ce4acaa2e7839760e5a
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spelling	oai:doaj.org-article:d20592baf7954ce4acaa2e7839760e5a2021-11-11T15:05:32ZEffects of Running Speed on Coupling between Pantograph of High-Speed Train and Tunnel Based on Aerodynamics and Multi-Body Dynamics Coupling10.3390/app1121100082076-3417https://doaj.org/article/d20592baf7954ce4acaa2e7839760e5a2021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10008https://doaj.org/toc/2076-3417(1) Background: The ratio of railway tunnel to line is larger, which produces tunnel entrance and exit effect, aerodynamic resistance, and sudden pressure changes. When the train passes through the tunnels at high-speed, the interaction between the pantograph on it and its surrounding air intensifies and the coupling effects between the pantograph and tunnel become more significant; (2) Methods: A coupling method between aerodynamics and multi-body dynamics is proposed based on hybrid meshing and grid motion. The layered grid motion method is combined with the viscous mesh deformation method with swift, effective data exchange. The significant coupling effects between the pantograph and tunnel are revealed; (3) Results: The influence laws and evolution mechanism of running speed as it affects important service characteristics and behaviors of the pantograph are accurately quantified. Noteworthy factors include the temporal characteristics of panhead aerodynamic lift, the contact force between the pantograph and catenary, vertical displacement and acceleration of the contact strip, the phase diagram of the contact strip, and various frequency-domain characteristics. The action mechanism of running speed on the coupling effect between the pantograph and tunnel is comprehensively and accurately revealed by the proposed method; (4) Conclusions: The larger service characteristics amplitudes of the high-speed pantograph appear at low frequencies and are not multiple frequencies of the basic frequency. By comparisons, the coupling calculation results are closer to the test results than the non-coupling results regardless of the maximum, minimum, or mean.Zhanling JiYi GuoDilong GuoGuowei YangYubiao LiuMDPI AGarticlecoupling effect between pantograph and tunnelhigh-speed pantographhigh-speed trainrunning speedcoupled aerodynamics and multi-body dynamicspassing through a tunnelTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10008, p 10008 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coupling effect between pantograph and tunnel high-speed pantograph high-speed train running speed coupled aerodynamics and multi-body dynamics passing through a tunnel Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	coupling effect between pantograph and tunnel high-speed pantograph high-speed train running speed coupled aerodynamics and multi-body dynamics passing through a tunnel Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Zhanling Ji Yi Guo Dilong Guo Guowei Yang Yubiao Liu Effects of Running Speed on Coupling between Pantograph of High-Speed Train and Tunnel Based on Aerodynamics and Multi-Body Dynamics Coupling
description	(1) Background: The ratio of railway tunnel to line is larger, which produces tunnel entrance and exit effect, aerodynamic resistance, and sudden pressure changes. When the train passes through the tunnels at high-speed, the interaction between the pantograph on it and its surrounding air intensifies and the coupling effects between the pantograph and tunnel become more significant; (2) Methods: A coupling method between aerodynamics and multi-body dynamics is proposed based on hybrid meshing and grid motion. The layered grid motion method is combined with the viscous mesh deformation method with swift, effective data exchange. The significant coupling effects between the pantograph and tunnel are revealed; (3) Results: The influence laws and evolution mechanism of running speed as it affects important service characteristics and behaviors of the pantograph are accurately quantified. Noteworthy factors include the temporal characteristics of panhead aerodynamic lift, the contact force between the pantograph and catenary, vertical displacement and acceleration of the contact strip, the phase diagram of the contact strip, and various frequency-domain characteristics. The action mechanism of running speed on the coupling effect between the pantograph and tunnel is comprehensively and accurately revealed by the proposed method; (4) Conclusions: The larger service characteristics amplitudes of the high-speed pantograph appear at low frequencies and are not multiple frequencies of the basic frequency. By comparisons, the coupling calculation results are closer to the test results than the non-coupling results regardless of the maximum, minimum, or mean.
format	article
author	Zhanling Ji Yi Guo Dilong Guo Guowei Yang Yubiao Liu
author_facet	Zhanling Ji Yi Guo Dilong Guo Guowei Yang Yubiao Liu
author_sort	Zhanling Ji
title	Effects of Running Speed on Coupling between Pantograph of High-Speed Train and Tunnel Based on Aerodynamics and Multi-Body Dynamics Coupling
title_short	Effects of Running Speed on Coupling between Pantograph of High-Speed Train and Tunnel Based on Aerodynamics and Multi-Body Dynamics Coupling
title_full	Effects of Running Speed on Coupling between Pantograph of High-Speed Train and Tunnel Based on Aerodynamics and Multi-Body Dynamics Coupling
title_fullStr	Effects of Running Speed on Coupling between Pantograph of High-Speed Train and Tunnel Based on Aerodynamics and Multi-Body Dynamics Coupling
title_full_unstemmed	Effects of Running Speed on Coupling between Pantograph of High-Speed Train and Tunnel Based on Aerodynamics and Multi-Body Dynamics Coupling
title_sort	effects of running speed on coupling between pantograph of high-speed train and tunnel based on aerodynamics and multi-body dynamics coupling
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d20592baf7954ce4acaa2e7839760e5a
work_keys_str_mv	AT zhanlingji effectsofrunningspeedoncouplingbetweenpantographofhighspeedtrainandtunnelbasedonaerodynamicsandmultibodydynamicscoupling AT yiguo effectsofrunningspeedoncouplingbetweenpantographofhighspeedtrainandtunnelbasedonaerodynamicsandmultibodydynamicscoupling AT dilongguo effectsofrunningspeedoncouplingbetweenpantographofhighspeedtrainandtunnelbasedonaerodynamicsandmultibodydynamicscoupling AT guoweiyang effectsofrunningspeedoncouplingbetweenpantographofhighspeedtrainandtunnelbasedonaerodynamicsandmultibodydynamicscoupling AT yubiaoliu effectsofrunningspeedoncouplingbetweenpantographofhighspeedtrainandtunnelbasedonaerodynamicsandmultibodydynamicscoupling
_version_	1718437178571227136

Effects of Running Speed on Coupling between Pantograph of High-Speed Train and Tunnel Based on Aerodynamics and Multi-Body Dynamics Coupling

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