Dynamic analysis and experimental study of a Tunnel boring Machine testbed under multiple conditions

Huo, Junzhou; Zhang, Zhange; Meng, Zhichao; Li, Jianbin; Wu, Hanyang; Jia, Lianhui

doi:10.1016/j.engfailanal.2021.105557

Cited by 11 publications

(2 citation statements)

References 25 publications

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“…Furthermore, they constructed a test bench for the main system of a hard rock tunnel boring machine. By considering time-varying external random excitations of the cutters, time-varying meshing stiffness of the gears, meshing errors, and main bearing stiffness, they established a multi-degree-of-freedom coupled dynamic model to study the load and vibration characteristics of the cutterhead [43]. Liao et al [44] established a multi-system coupled closed dynamics model by considering the closed structure of the shield machine and the interaction with the rock, and the equations of motion of each rigid body in the tunnel boring machine system in generalized coordinates were derived.…”

Section: The External Excitationmentioning

confidence: 99%

Review on Vibration Monitoring and Its Application during Shield Tunnel Construction Period

Yang,

Fang,

Wang

et al. 2024

Buildings

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With the rapid development of metro construction, shield machines inevitably have to traverse a variety of complex geological conditions, leading to the frequent occurrence of geological disasters, equipment failures, building vibration and other problems. Vibration, as an important feature of the shield tunneling process, has received more and more attention in recent years. This paper summarizes the relevant research progress of vibration monitoring during shield construction from 2015 to 2023. It analyzes the shield vibration generation mechanism, monitoring methods and application areas. Firstly, the shield vibration type is divided into mechanical vibration triggered by internal excitation and forced vibration triggered by external excitation, and the principles of vibration generated by shield main bearing, gearbox and disc cutter are discussed. Then, the commonly used vibration monitoring methods are outlined according to the installation location of the sensors (inside and outside of the shield). Finally, the applications of vibration signals in the diagnosis of shield faults, the identification of geologic conditions, and the evaluation of the current status of the interference with the buildings are summarized. This paper discusses the development trend of vibration monitoring during shield tunneling based on the current research situation and the current technology level, which provides valuable insights to enhance the safety and intelligence of shield construction.

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Section: The External Excitationmentioning

confidence: 99%

Review on Vibration Monitoring and Its Application during Shield Tunnel Construction Period

Yang,

Fang,

Wang

et al. 2024

Buildings

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“…As tunnel construction technology advances, the size of tunnel boring machines (TBMs) continues to grow and the demand for greater load capacity increases. Key bearing components such as main drives and cutterheads bear large vibration loads during operation 1 – 3 . To ensure product dependability, T-joints are typically constructed using thick plates measuring at least 40 mm for both horizontal and vertical welding.…”

Section: Introductionmentioning

confidence: 99%

Heat source modeling, penetration analysis and parametric optimization of super spray MAG welding

Xia

2023

Sci Rep

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Main drives, cutterheads and other critical components of tunnel shield machines require welding with thick plates that leave roots over 5 mm. Full penetration welds cannot be achieved by conventional Pulsed MAG welding methods. This article introduces Super Spray MAG Welding technology and investigates its penetrating regularities and mechanisms through high-speed camera images, finite element simulation, and microstructural analysis. An optimal welding procedure was generated using a combination of Genetic Algorithm and Back Propagation Neural Network. The data show that Super Spray MAG arc exhibits greater concentration and stability than traditional MAG arc, marking its strong qualities in emitting high-energy beams. The morphological solidification pattern of the molten pool closely matches the FEM simulation results of the composite Gaussian surface heat source model and peak linear attenuation Gaussian cylinder heat source. The welding current mainly affects the penetration of the weld, followed by the extension of the wire, and lastly the welding speed. Increasing the welding current can transition droplet transfer from globular to spray, as well as alter microstructure development and mechanical characteristics. Suggested parameters for penetrating the 5 mm root were put forward. The BPNN-GA model established can effectively predict weld formation, and points out the optimal welding parameters.

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Dynamic Cutting Force Model and Vibration Analysis of the Cutterhead in TBM

Sun,

Gao

2023

Rock Mech Rock Eng

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Dynamic analysis and experimental study of a Tunnel boring Machine testbed under multiple conditions

Cited by 11 publications

References 25 publications

Review on Vibration Monitoring and Its Application during Shield Tunnel Construction Period

Review on Vibration Monitoring and Its Application during Shield Tunnel Construction Period

Heat source modeling, penetration analysis and parametric optimization of super spray MAG welding

Dynamic Cutting Force Model and Vibration Analysis of the Cutterhead in TBM

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