Theoretical, Numerical, and Experimental Study on the Identification of Subway Tunnel Structural Damage Based on the Moving Train Dynamic Response

As an important part of urban rail transit, subway tunnels play an important role in alleviating traffic pressure in mega-cities. Identifying and locating damage to the tunnel structure as early as possible has important practical significance for maintaining the long-term safe operation of subway t...

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Autores principales:	Hongqiao Li, Xiongyao Xie, Yonglai Zhang, Qiang Wang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	subway tunnel moving train damage identification wavelet packet energy acceleration sensor Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/740e31a35aee48a7bf29b679e7e14654
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id	oai:doaj.org-article:740e31a35aee48a7bf29b679e7e14654
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spelling	oai:doaj.org-article:740e31a35aee48a7bf29b679e7e146542021-11-11T19:11:18ZTheoretical, Numerical, and Experimental Study on the Identification of Subway Tunnel Structural Damage Based on the Moving Train Dynamic Response10.3390/s212171971424-8220https://doaj.org/article/740e31a35aee48a7bf29b679e7e146542021-10-01T00:00:00Zhttps://www.mdpi.com/1424-8220/21/21/7197https://doaj.org/toc/1424-8220As an important part of urban rail transit, subway tunnels play an important role in alleviating traffic pressure in mega-cities. Identifying and locating damage to the tunnel structure as early as possible has important practical significance for maintaining the long-term safe operation of subway tunnels. Summarizing the current status and shortcomings of the structural health monitoring of subway tunnels, a very economical and effective monitoring program is proposed, which is to use the train vibration response to identify and locate the damage of the tunnel structure. Firstly, the control equation of vehicle–tunnel coupling vibration is established and its analytical solution is given as the theoretical basis of this paper. Then, a damage index based on the cumulative sum of wavelet packet energy change rate (<i>TDI<sub>SC</sub></i>) is proposed, and its process algorithm is given. Through the joint simulation of VI-Rail and ANSYS, a refined 3D train-tunnel coupled vibration model is established. In this model, different combined conditions of single damage and double damage verify the validity of the damage index. The effectiveness of this damage index was further verified through model tests, and the influence of vehicle speed and load on the algorithm was discussed. Numerical simulation and experimental results show that the <i>TDI<sub>SC</sub></i> can effectively locate the damage of the tunnel structure and has good robustness.Hongqiao LiXiongyao XieYonglai ZhangQiang WangMDPI AGarticlesubway tunnelmoving traindamage identificationwavelet packet energyacceleration sensorChemical technologyTP1-1185ENSensors, Vol 21, Iss 7197, p 7197 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	subway tunnel moving train damage identification wavelet packet energy acceleration sensor Chemical technology TP1-1185
spellingShingle	subway tunnel moving train damage identification wavelet packet energy acceleration sensor Chemical technology TP1-1185 Hongqiao Li Xiongyao Xie Yonglai Zhang Qiang Wang Theoretical, Numerical, and Experimental Study on the Identification of Subway Tunnel Structural Damage Based on the Moving Train Dynamic Response
description	As an important part of urban rail transit, subway tunnels play an important role in alleviating traffic pressure in mega-cities. Identifying and locating damage to the tunnel structure as early as possible has important practical significance for maintaining the long-term safe operation of subway tunnels. Summarizing the current status and shortcomings of the structural health monitoring of subway tunnels, a very economical and effective monitoring program is proposed, which is to use the train vibration response to identify and locate the damage of the tunnel structure. Firstly, the control equation of vehicle–tunnel coupling vibration is established and its analytical solution is given as the theoretical basis of this paper. Then, a damage index based on the cumulative sum of wavelet packet energy change rate (<i>TDI<sub>SC</sub></i>) is proposed, and its process algorithm is given. Through the joint simulation of VI-Rail and ANSYS, a refined 3D train-tunnel coupled vibration model is established. In this model, different combined conditions of single damage and double damage verify the validity of the damage index. The effectiveness of this damage index was further verified through model tests, and the influence of vehicle speed and load on the algorithm was discussed. Numerical simulation and experimental results show that the <i>TDI<sub>SC</sub></i> can effectively locate the damage of the tunnel structure and has good robustness.
format	article
author	Hongqiao Li Xiongyao Xie Yonglai Zhang Qiang Wang
author_facet	Hongqiao Li Xiongyao Xie Yonglai Zhang Qiang Wang
author_sort	Hongqiao Li
title	Theoretical, Numerical, and Experimental Study on the Identification of Subway Tunnel Structural Damage Based on the Moving Train Dynamic Response
title_short	Theoretical, Numerical, and Experimental Study on the Identification of Subway Tunnel Structural Damage Based on the Moving Train Dynamic Response
title_full	Theoretical, Numerical, and Experimental Study on the Identification of Subway Tunnel Structural Damage Based on the Moving Train Dynamic Response
title_fullStr	Theoretical, Numerical, and Experimental Study on the Identification of Subway Tunnel Structural Damage Based on the Moving Train Dynamic Response
title_full_unstemmed	Theoretical, Numerical, and Experimental Study on the Identification of Subway Tunnel Structural Damage Based on the Moving Train Dynamic Response
title_sort	theoretical, numerical, and experimental study on the identification of subway tunnel structural damage based on the moving train dynamic response
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/740e31a35aee48a7bf29b679e7e14654
work_keys_str_mv	AT hongqiaoli theoreticalnumericalandexperimentalstudyontheidentificationofsubwaytunnelstructuraldamagebasedonthemovingtraindynamicresponse AT xiongyaoxie theoreticalnumericalandexperimentalstudyontheidentificationofsubwaytunnelstructuraldamagebasedonthemovingtraindynamicresponse AT yonglaizhang theoreticalnumericalandexperimentalstudyontheidentificationofsubwaytunnelstructuraldamagebasedonthemovingtraindynamicresponse AT qiangwang theoreticalnumericalandexperimentalstudyontheidentificationofsubwaytunnelstructuraldamagebasedonthemovingtraindynamicresponse
_version_	1718431592000520192

Theoretical, Numerical, and Experimental Study on the Identification of Subway Tunnel Structural Damage Based on the Moving Train Dynamic Response

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