Transient dynamic analysis of cutter-head loads: effects of different cutter spacings during excavation
As a critical component in achieving the rock-breaking function during the operation of Tunnel Boring Machines (TBM), the cutterhead inevitably generates significant vibrations during the rock-breaking process. These vibrations can lead to localized damage to the cutterhead and cause the abnormal fa...
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Frontiers Media S.A.
2025-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2024.1501301/full |
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| author | Minglei Kang Haining Liu Wenjia Ma Luqi Wang Jianjun Zhou Miao Li |
| author_facet | Minglei Kang Haining Liu Wenjia Ma Luqi Wang Jianjun Zhou Miao Li |
| author_sort | Minglei Kang |
| collection | DOAJ |
| description | As a critical component in achieving the rock-breaking function during the operation of Tunnel Boring Machines (TBM), the cutterhead inevitably generates significant vibrations during the rock-breaking process. These vibrations can lead to localized damage to the cutterhead and cause the abnormal failure of key components, which, in turn, may compromise the overall tunneling efficiency of the machine. This study investigates the load and vibration characteristics of the cutterhead during the rock-breaking process, employing large-scale physical model experiments conducted at varying cutter spacings. Real-time acceleration data from the cutterhead can be obtained through the monitoring system integrated into the TBM (Tunnel Boring Machine) experimental platform. The whole time-domain curves are stepped and periodic, as demonstrated by the test results. During excavation, the monitoring curves vibrate suddenly if the cutter-head becomes stuck or if rocks begin to fracture. The cutter-head primarily exhibits vibrations in the 0∼3 Hz range, characteristic of low-frequency oscillations. To obtain the real-time mechanical properties of the cutter-head, transient dynamic analysis was employed, utilizing the collected data as driving parameters. According to numerical simulation results, the vibration pattern during excavation is the superposition of random vibrations generated by rock breaking and the unloading of the tunnel face. Moreover, it is important to monitor the wear of the edge cutters throughout the boring operation in real-world construction scenarios. To prevent and control cutterhead vibration, it is recommended that the cutter spacing be as small as possible during the tunneling process. At a smaller tool spacing, the cutterhead will exhibit higher structural integrity, which may lead to a delay in the response of mechanical vibration. The conclusions presented offer valuable insights for the study of the mechanical properties and stability design of TBM cutterheads. |
| format | Article |
| id | doaj-art-76a734d6f2004b3d810dfe83d7447785 |
| institution | Kabale University |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj-art-76a734d6f2004b3d810dfe83d74477852025-01-22T07:14:54ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-01-011210.3389/feart.2024.15013011501301Transient dynamic analysis of cutter-head loads: effects of different cutter spacings during excavationMinglei Kang0Haining Liu1Wenjia Ma2Luqi Wang3Jianjun Zhou4Miao Li5Yubei Water Conservancy Project Management Bureau of Henan Province, Jiyuan, ChinaCollege of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, ChinaCollege of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, ChinaState Key Laboratory of Shield Machine and Boring Technology, Zhengzhou, ChinaState Key Laboratory of Shield Machine and Boring Technology, Zhengzhou, ChinaCollege of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou, ChinaAs a critical component in achieving the rock-breaking function during the operation of Tunnel Boring Machines (TBM), the cutterhead inevitably generates significant vibrations during the rock-breaking process. These vibrations can lead to localized damage to the cutterhead and cause the abnormal failure of key components, which, in turn, may compromise the overall tunneling efficiency of the machine. This study investigates the load and vibration characteristics of the cutterhead during the rock-breaking process, employing large-scale physical model experiments conducted at varying cutter spacings. Real-time acceleration data from the cutterhead can be obtained through the monitoring system integrated into the TBM (Tunnel Boring Machine) experimental platform. The whole time-domain curves are stepped and periodic, as demonstrated by the test results. During excavation, the monitoring curves vibrate suddenly if the cutter-head becomes stuck or if rocks begin to fracture. The cutter-head primarily exhibits vibrations in the 0∼3 Hz range, characteristic of low-frequency oscillations. To obtain the real-time mechanical properties of the cutter-head, transient dynamic analysis was employed, utilizing the collected data as driving parameters. According to numerical simulation results, the vibration pattern during excavation is the superposition of random vibrations generated by rock breaking and the unloading of the tunnel face. Moreover, it is important to monitor the wear of the edge cutters throughout the boring operation in real-world construction scenarios. To prevent and control cutterhead vibration, it is recommended that the cutter spacing be as small as possible during the tunneling process. At a smaller tool spacing, the cutterhead will exhibit higher structural integrity, which may lead to a delay in the response of mechanical vibration. The conclusions presented offer valuable insights for the study of the mechanical properties and stability design of TBM cutterheads.https://www.frontiersin.org/articles/10.3389/feart.2024.1501301/fullcutter spacingTBMmechanical characteristics of cutter-headthe transient dynamic analysisrock-breaking process |
| spellingShingle | Minglei Kang Haining Liu Wenjia Ma Luqi Wang Jianjun Zhou Miao Li Transient dynamic analysis of cutter-head loads: effects of different cutter spacings during excavation Frontiers in Earth Science cutter spacing TBM mechanical characteristics of cutter-head the transient dynamic analysis rock-breaking process |
| title | Transient dynamic analysis of cutter-head loads: effects of different cutter spacings during excavation |
| title_full | Transient dynamic analysis of cutter-head loads: effects of different cutter spacings during excavation |
| title_fullStr | Transient dynamic analysis of cutter-head loads: effects of different cutter spacings during excavation |
| title_full_unstemmed | Transient dynamic analysis of cutter-head loads: effects of different cutter spacings during excavation |
| title_short | Transient dynamic analysis of cutter-head loads: effects of different cutter spacings during excavation |
| title_sort | transient dynamic analysis of cutter head loads effects of different cutter spacings during excavation |
| topic | cutter spacing TBM mechanical characteristics of cutter-head the transient dynamic analysis rock-breaking process |
| url | https://www.frontiersin.org/articles/10.3389/feart.2024.1501301/full |
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