Force analysis of an open TBM gripping–thrusting–regripping mechanism

Huang, Tian; Wang, Xiaolong; Liu, Haitao; Yang, Yuhu

doi:10.1016/j.mechmachtheory.2015.12.003

Cited by 22 publications

(12 citation statements)

References 22 publications

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“…Wu et al [14] obtained the dynamic speed rigidity, static speed rigidity, and minimum speed rigidity of a TBM thrust hydraulic cylinder based on a typical cylinder controlled by the reducing valve. Huang et al [15] proposed a mechanical analytical method of an open-type TBM supportingthrusting system, established the cutterhead-main-beamsaddle static equilibrium equation, and obtained the mapping relationship between the thrust propelling the hydrocylinder and the hydrocylinder force applied on the shield. Yu et al [16] obtained the correlation between the normal contact stiffness and the loads, which considers parameters such as the roughness of the tunnel surfaces, the mechanical behaviour of rocks, the number of the supporting boots, and composite geologic structures.…”

Section: Introductionmentioning

confidence: 99%

“…Xie and Yu [17] studied the stiffness of the surface between gripper shoes and rocks, and the results demonstrated that stiffness increases with the enlargement of loads on the cutterhead. Huang et al [15] presented an approach for force analysis of gripping-thrusting-regripping mechanism (GTRM) of an open TBM. At present, scholars' dynamics research on TBM supporting-thrusting system mainly focuses on load transfer and modeling, stiffness characteristics, etc., but there is less research on vibration characteristics and influencing factors.…”

Section: Introductionmentioning

confidence: 99%

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Influence Factors of Vibration Response on Supporting-Thrusting System of Tunnel Boring Machine

Mei

Xia

Lin

et al. 2020

Mathematical Problems in Engineering

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A supporting-thrusting system is the main load-bearing component of a tunnel boring machine (TBM) and the centralization of vibration response under TBM working. This study combines the structure and working principle of the supporting-thrusting system. Based on the vibration theory and test results at a construction site, the main influence factors of the vibration response of the supporting-thrusting system are the main beam structure, the characteristic parameters of advance cylinder, and the support pressure to surrounding rock. Under the different influence factors, the vibration response of the supporting-thrusting system is calculated and analyzed via computer simulation. The results indicate that, under the equivalent input-load on the TBM and increase in the length of the front main beam, the vibration acceleration at the front area of the TBM increases. The change rate of vertical vibration will be maximum, while the vibration acceleration at the rear area of TBM decreases. When the structure size of the thrusting cylinder increases, the vibration acceleration on the main beam decreases and those of the gripper shoe and saddle frame increase. However, the response to the axis vibration is the most sensitive. As the horizontal support pressure to the surrounding rock increases, the vibration acceleration on supporting-thrusting system decreases. When the level of support pressure exceeds 1.6e4 kN, the vibration acceleration changes gradually. These results provide a reference for designing and operating TBM parameters.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence Factors of Vibration Response on Supporting-Thrusting System of Tunnel Boring Machine

Mei

Xia

Lin

et al. 2020

Mathematical Problems in Engineering

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show abstract

“…The vibration energy is transferred to the support system through the main beam, making the support system vibrate [7]. As a key working component of TBM, the support system provides the excavating counter-torque and counter-force during the excavation process [8,9], which has an important influence on system vibration; therefore, the stiffness characteristics of the support system receive significant concern [10,11].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Static and Dynamic Stiffness Characteristics of Support Hydraulic System of TBM

Tao

Lei

Liu

et al. 2019

Chin. J. Mech. Eng.

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Full-face hard rock tunnel boring machines (TBM) are essential equipment in highway and railway tunnel engineering construction. During the tunneling process, TBM have serious vibrations, which can damage some of its key components. The support system,an important part of TBM, is one path through which vibrational energy from the cutter head is transmitted. To reduce the vibration of support systems of TBM during the excavation process, based on the structural features of the support hydraulic system, a nonlinear dynamical model of support hydraulic systems of TBM is established. The influences of the component structure parameters and operating conditions parameters on the stiffness characteristics of the support hydraulic system are analyzed. The analysis results indicate that the static stiffness of the support hydraulic system consists of an increase stage, stable stage and decrease stage. The static stiffness value increases with an increase in the clearances. The pre-compression length of the spring in the relief valve affects the range of the stable stage of the static stiffness, and it does not affect the static stiffness value. The dynamic stiffness of the support hydraulic system consists of a U-shape and reverse U-shape. The bottom value of the U-shape increases with the amplitude and frequency of the external force acting on the cylinder body, however, the top value of the reverse U-shape remains constant. This study instructs how to design the support hydraulic system of TBM.

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“…Festa et al [25] set up a kinematic model for a TBM based on theoretical and geometrical considerations, and the ground displacements were obtained through the model and verified using the TBM monitoring data. In addition, considering the redundant driven rotary system, propulsion system, and geological conditions, Zhang et al [26] and Huang et al [27] established a mutual coupling dynamic model for cutterhead tunneling to analyze the dynamic characteristics of the rotary and supporting-propulsion systems under complex geological conditions. As mentioned before, efforts have been intensified in the research and design of TBM cutterheads.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics Analysis with Multi-Directional Coupling in a TBM Mainframe

Lin

Xia

et al. 2019

Chin. J. Mech. Eng.

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The cutterhead of a full-face rock tunnel boring machine (TBM) is constantly subjected to varying impact and dynamic loads during tunneling processes, resulting in relatively large vibrations that could easily lead to fatigue cracking of the entire machine and affect the tunneling performance and efficiency. To explore the dynamic characteristics of the TBM mainframe, a TBM from a water-diversion project is investigated in this research. According to the TBM vibration transmission route, an equivalent dynamic model of the TBM mainframe is established using the lumped-mass method in which the relevant dynamic parameters are solved. Additionally, the dynamic response characteristics of the TBM mainframe are analyzed. The results indicate that the vibration levels in three directions are approximately the same, the multi-directional vibration of the cutterhead is more intense than that of other components, and the vibration and external excitation exhibit identical change trends. A set of vibration field tests is performed to analyze the in situ dynamic responses of the mainframe and verify the correctness of the dynamic model. The theoretical and measured acceleration values of the TBM mainframe have the same magnitude, which proves the validity of the dynamic model and its solution. The aforementioned results provide an important theoretical value and practical significance for the design and assessment of the TBM mainframe.

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Force analysis of an open TBM gripping–thrusting–regripping mechanism

Cited by 22 publications

References 22 publications

Influence Factors of Vibration Response on Supporting-Thrusting System of Tunnel Boring Machine

Influence Factors of Vibration Response on Supporting-Thrusting System of Tunnel Boring Machine

Nonlinear Static and Dynamic Stiffness Characteristics of Support Hydraulic System of TBM

Dynamic Characteristics Analysis with Multi-Directional Coupling in a TBM Mainframe

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