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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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/21/7197 |
| _version_ | 1797511784304738304 |
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| author | Hongqiao Li Xiongyao Xie Yonglai Zhang Qiang Wang |
| author_facet | Hongqiao Li Xiongyao Xie Yonglai Zhang Qiang Wang |
| author_sort | Hongqiao Li |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:52:00Z |
| format | Article |
| id | doaj.art-740e31a35aee48a7bf29b679e7e14654 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T05:52:00Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-740e31a35aee48a7bf29b679e7e146542023-11-22T21:38:08ZengMDPI AGSensors1424-82202021-10-012121719710.3390/s21217197Theoretical, Numerical, and Experimental Study on the Identification of Subway Tunnel Structural Damage Based on the Moving Train Dynamic ResponseHongqiao Li0Xiongyao Xie1Yonglai Zhang2Qiang Wang3School of Civil Engineering, Tongji University, Shanghai 200092, ChinaSchool of Civil Engineering, Tongji University, Shanghai 200092, ChinaSchool of Civil Engineering, Tongji University, Shanghai 200092, ChinaSchool of Civil Engineering, Tongji University, Shanghai 200092, ChinaAs 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.https://www.mdpi.com/1424-8220/21/21/7197subway tunnelmoving traindamage identificationwavelet packet energyacceleration sensor |
| spellingShingle | 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 Sensors subway tunnel moving train damage identification wavelet packet energy acceleration sensor |
| title | 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_short | 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 |
| topic | subway tunnel moving train damage identification wavelet packet energy acceleration sensor |
| url | https://www.mdpi.com/1424-8220/21/21/7197 |
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