Rock Crushing Analysis of TBM Disc Cutter Assisted by Ultra-High-Frequency Loading
In the construction of mountain tunnels, the increasing proportion of hard rock stratum enhances the difficulty of rock breaking by tunnel boring machine (TBM). As a type of cyclic load with ultrahigh frequency, ultrasonic vibration has the advantages of energy concentration and strong penetration....
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2022/1177745 |
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| _version_ | 1850159662717992960 |
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| author | Dajun Zhao Junpeng Han Yu Zhou Xiaoshu Lv Shulei Zhang Ke Gao Yan Zhao |
| author_facet | Dajun Zhao Junpeng Han Yu Zhou Xiaoshu Lv Shulei Zhang Ke Gao Yan Zhao |
| author_sort | Dajun Zhao |
| collection | DOAJ |
| description | In the construction of mountain tunnels, the increasing proportion of hard rock stratum enhances the difficulty of rock breaking by tunnel boring machine (TBM). As a type of cyclic load with ultrahigh frequency, ultrasonic vibration has the advantages of energy concentration and strong penetration. In the process of rolling and extrusion, the weakening of the rock by ultrahigh-frequency loading can improve the rock crushing efficiency of the TBM disc cutter. In this study, we established a physical model of rock cutting using a disc cutter assisted by ultrasonic vibration and obtained a motion equation. The discrete element software particle flow code (PFC) was selected to construct a heterogeneous granite model to demonstrate the mechanism and development of cracks inside the hard rock under a rolling disc cutter assisted by ultrasonic vibration. The results demonstrate that ultrasonic vibration helps the disc cutter construct a stronger stress field in the shallow layer, which promotes tensile damage of the surface rock. Vibration promotes the development of cracks inside the rock and accelerates the penetration of transverse cracks, which is conducive to the stripping of rock fragments. The addition of ultrahigh-frequency loading also reduces the fluctuation increase of cracks, which makes the operation state of the disc cutter more stable and avoids abnormal damage to tools. |
| format | Article |
| id | doaj-art-b2f7eee558bf4fbd99a6a2e0471e290d |
| institution | OA Journals |
| issn | 1875-9203 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-b2f7eee558bf4fbd99a6a2e0471e290d2025-08-20T02:23:27ZengWileyShock and Vibration1875-92032022-01-01202210.1155/2022/1177745Rock Crushing Analysis of TBM Disc Cutter Assisted by Ultra-High-Frequency LoadingDajun Zhao0Junpeng Han1Yu Zhou2Xiaoshu Lv3Shulei Zhang4Ke Gao5Yan Zhao6Key Laboratory of Geophysical Exploration EquipmentKey Laboratory of Geophysical Exploration Equipment3Shaoxing University2College of Construction EngineeringYellow River SurveyKey Laboratory of Geophysical Exploration EquipmentKey Laboratory of Geophysical Exploration EquipmentIn the construction of mountain tunnels, the increasing proportion of hard rock stratum enhances the difficulty of rock breaking by tunnel boring machine (TBM). As a type of cyclic load with ultrahigh frequency, ultrasonic vibration has the advantages of energy concentration and strong penetration. In the process of rolling and extrusion, the weakening of the rock by ultrahigh-frequency loading can improve the rock crushing efficiency of the TBM disc cutter. In this study, we established a physical model of rock cutting using a disc cutter assisted by ultrasonic vibration and obtained a motion equation. The discrete element software particle flow code (PFC) was selected to construct a heterogeneous granite model to demonstrate the mechanism and development of cracks inside the hard rock under a rolling disc cutter assisted by ultrasonic vibration. The results demonstrate that ultrasonic vibration helps the disc cutter construct a stronger stress field in the shallow layer, which promotes tensile damage of the surface rock. Vibration promotes the development of cracks inside the rock and accelerates the penetration of transverse cracks, which is conducive to the stripping of rock fragments. The addition of ultrahigh-frequency loading also reduces the fluctuation increase of cracks, which makes the operation state of the disc cutter more stable and avoids abnormal damage to tools.http://dx.doi.org/10.1155/2022/1177745 |
| spellingShingle | Dajun Zhao Junpeng Han Yu Zhou Xiaoshu Lv Shulei Zhang Ke Gao Yan Zhao Rock Crushing Analysis of TBM Disc Cutter Assisted by Ultra-High-Frequency Loading Shock and Vibration |
| title | Rock Crushing Analysis of TBM Disc Cutter Assisted by Ultra-High-Frequency Loading |
| title_full | Rock Crushing Analysis of TBM Disc Cutter Assisted by Ultra-High-Frequency Loading |
| title_fullStr | Rock Crushing Analysis of TBM Disc Cutter Assisted by Ultra-High-Frequency Loading |
| title_full_unstemmed | Rock Crushing Analysis of TBM Disc Cutter Assisted by Ultra-High-Frequency Loading |
| title_short | Rock Crushing Analysis of TBM Disc Cutter Assisted by Ultra-High-Frequency Loading |
| title_sort | rock crushing analysis of tbm disc cutter assisted by ultra high frequency loading |
| url | http://dx.doi.org/10.1155/2022/1177745 |
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