Rock-breaking Characteristics of TBM Gage Disc Cutters and Sensitivity Analysis of Their Influencing Factors

被引：5
|
作者：
Lin L. [1 ]
Xia Y. [1 ]
Jia L. [2 ]
Wu D. [3 ]
Shen B. [1 ]
Zhang X. [1 ]
机构：
[1] College of Mechanical and Electrical Engineering, Central South University, Changsha
[2] China Railway Engineering Equipment Group Co., Ltd., Zhengzhou
[3] China Railway Shisiju Group Corporation Tunnel Engineering Co., Ltd., Jinan
来源：
Xia, Yimin (xiaymj@csu.edu.cn) | 2018年 / Chinese Mechanical Engineering Society卷 / 54期
关键词：
Gage disc cutter; Rock-breaking mechanism; Sensibility analysis; Tunnel boring machine;
D O I：
10.3901/JME.2018.01.018
中图分类号：
学科分类号：
摘要：
The disc cutter is the key part of a tunnel boring machine (TBM). The rock-breaking behaviors of the gage cutter are different from those of the normal cutter due to its special installation position. To investigate the rock-breaking mechanisms of gage cutters and the effects of rock-breaking parameters on the rock-breaking performance, a simulation model of rock fragmentation for the gage cutters interacting with the granite and limestone is established, and the evolution process of rock cracks, the regularities of changes in the stress distribution and the cutter load are presented. Based on the simulations, the effects of rock-breaking sensitivity parameters on the rock-breaking performance of gage cutters are obtained using a comprehensive assessment model of attribute recognition on the basis of entropy weight of sensitivity. The results show that the rock-breaking characteristics of gage cutters and the sensitivities of their rock breaking parameters are different under different rock conditions. The main influence factors on the cutter rock-breaking performance are the dip between adjacent cutters, the arc radius of cutterhead and the cutting edge angle, then the next are the width of cutter ring and the penetration. Finally the minor influence factor is the rotational speed of cutterhead. © 2018 Journal of Mechanical Engineering.
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页码：18 / 26
页数：8
相关论文
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