Influence of vibration on the performance of tunnel boring machines

Zou, Xiaoyang; Mi, Yongzhen; Zheng, Hui; Tao, Jianfeng

doi:10.1109/mesa.2016.7587129

Cited by 8 publications

(9 citation statements)

References 14 publications

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“…where , , and are the displacements of contact point in normal, tangential, and tunneling direction, respectively, 0 is the initial compression of normal spring due to TBM gravity, and is a velocity related frictional coefficient. According to [20], is taken as = 0.15-0.30 for kinetic coefficient and = 0.25-0.45 for static coefficient. To reduce the computational difficulty due to discontinuity brought by bottom shield's stick-slip state, a smooth representation of with velocityweakening law is adopted and expressed as…”

Section: Tbm-rockmentioning

confidence: 99%

“…To estimate cutter's vulnerability to wear, disc cutter wear rate is used. Based on CSM model shown in (4), disc cutter wear rate can be calculated by [20]…”

Section: Disc Cutter Wearmentioning

confidence: 99%

“…A model of disc cutter wear rate was built [19]. Later, a modified model for the evaluation of cutter wear rate considering the influence of vibration was developed [20]. Based on this modified model, it is possible to further evaluate cutter's vulnerability to wear considering the operational and rock conditions.…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of Hard Rock TBMs considering Operational and Rock Conditions

Zou

Zheng

2018

Shock and Vibration

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This paper focuses on studying the correlations of the performance of hard rock tunnel boring machines (TBMs) with operational and rock conditions. Firstly, a rigid-flexible coupled multibody dynamic model of an opening hard rock TBM is established for the analysis of its vibration. Then four performance indexes including mean vibration energy dissipation rate, dynamic specific energy (DSE), disc cutter wear rate, and load sharing coefficient are introduced and formulated, respectively, for evaluating the vibration level, excavation energy efficiency, cutter’s vulnerability to wear, and load transmission performance of cutterhead driving system of the TBM. Finally, numerical simulation results of the TBM tunneling performance evaluation are obtained and validated by on-site vibration measurement and tunneling data collection. It is found that operational and rock conditions exert important impact on TBM vibration level, excavation energy efficiency, and structure damage. When the type of rock to be cut changes from soft to hard with operational parameters held constant, TBM performance evaluated by these three indexes deteriorates significantly, and both the decrease of excavation energy efficiency and the increase of cutter wear rate caused by TBM vibration are obvious. This study provides the foundation for a more comprehensive evaluation of TBM performance in actual tunneling process.

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Section: Tbm-rockmentioning

confidence: 99%

“…To estimate cutter's vulnerability to wear, disc cutter wear rate is used. Based on CSM model shown in (4), disc cutter wear rate can be calculated by [20]…”

Section: Disc Cutter Wearmentioning

confidence: 99%

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Performance Evaluation of Hard Rock TBMs considering Operational and Rock Conditions

Zou

Zheng

2018

Shock and Vibration

Self Cite

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“…The model laid the foundation for the dynamic performance optimization and fatigue life prediction for the cutterhead system. Zou et al [6] proposed a dynamic model for the main machine of TBM that included the cutterhead, the driving system, the thrust system, and the interaction between the TBM and the surrounding rocks in terms of the lump parameter method. Different researches show that vibration of TBM could influence the efficiency and the fatigue life of different components, especially the cutterhead and the main drive motor.…”

Section: Introductionmentioning

confidence: 99%

“…The working flow illustrating the boring loops of TBM is shown in Figure 2. Firstly, the gripper cylinder (6) extends to support the gripper shoes (8) onto the rock for providing braced force and keeping the main machine stable. The gripper cylinder is connected with the main girder (7) with four torque cylinders (5).…”

Section: Introductionmentioning

confidence: 99%

Online Condition Monitoring of Gripper Cylinder in TBM Based on EMD Method

Tao

Yu³

et al. 2017

Chin. J. Mech. Eng.

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The gripper cylinder that provides braced force for Tunnel Boring Machine (TBM) might fail due to severe vibration when the TBM excavates in the tunnel. Early fault diagnosis of the gripper cylinder is important for the safety and efficiency of the whole tunneling project. In this paper, an online condition monitoring system based on the Empirical Mode Decomposition (EMD) method is established for fault diagnosis of the gripper cylinder while TBM is working. Firstly, the lumped mass parameter model of the gripper cylinder is established considering the influence of the variable stiffness at the rock interface, the equivalent stiffness of the oil, the seals, and the copper guide sleeve. The dynamic performance of the gripper cylinder is investigated to provide basis for its health condition evaluation. Then, the EMD method is applied to identify the characteristic frequencies of the gripper cylinder for fault diagnosis and a field test is used to verify the accuracy of the EMD method for detection of the characteristic frequencies. Furthermore, the contact stiffness at the interface between the barrel and the rod is calculated with Hertz theory and the relationship between the natural frequency and the stiffness varying with the health condition of the cylinder is simulated based on the dynamic model. The simulation shows that the characteristic frequencies decrease with the increasing clearance between the barrel and the rod, thus the defects could be indicated by monitoring the natural frequency. Finally, a health condition management system of the gripper cylinder based on the vibration signal and the EMD method is established, which could ensure the safety of TBM.

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Frictional contact-vibration coupling model for tbm rock cutting with multi-cutter

Zhang,

Sun,

et al. 2024

Computers and Geotechnics

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Influence of vibration on the performance of tunnel boring machines

Cited by 8 publications

References 14 publications

Performance Evaluation of Hard Rock TBMs considering Operational and Rock Conditions

Performance Evaluation of Hard Rock TBMs considering Operational and Rock Conditions

Online Condition Monitoring of Gripper Cylinder in TBM Based on EMD Method

Frictional contact-vibration coupling model for tbm rock cutting with multi-cutter

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