Vibration Performance Analysis for the Gripper Cylinder of Tunnel Boring Machine with Variable Stiffness

doi:10.16183/j.cnki.jsjtu.2017.09.006

Abstract

Abstract: The vibration of full face hard rock tunnel boring machine (TBM) can cause the damages of the gripper cylinder that may result in breakdown of the whole system. A lumpedmass parameter dynamic model of the gripper cylinder in TBMs is established based on the Lagrange method, and the variable stiffness behavior of the structures in the cylinder and the working conditions are considered in the model. The dynamic performance and load transmission of the gripper cylinder are numerically discussed with the influence of the piston rod extension, the equivalent stiffness of the rock and seals and the copper guide sleeve. The results show that the natural frequency of the gripper cylinder decreases with the extension length of the piston rod. The natural frequency has the positive correlation with the equivalent stiffness of the rock, the seal, the copper guide sleeve and the oil. The equivalent stiffness of the oil and seals are the most important factor. The characteristics of the vibration load can be achieved in terms of the analysis of the vibration performance of hydraulic cylinder, and may provide the basement of the damage analysis for the hydraulic cylinder.

Key words: full face hard rock tunnel boring machine; gripper cylinder; variable stiffness; dynamic model; vibration analysis

CLC Number:

TB 112

LI Lina,YU Haidonga,b,TAO Jianfenga,LIU Chenglianga. Vibration Performance Analysis for the Gripper Cylinder of Tunnel Boring Machine with Variable Stiffness[J]. Journal of Shanghai Jiao Tong University, 2017, 51(9): 1058-1064.

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