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中南大学学报(英文版)

Journal of Central South University

Vol. 26    No. 9    September 2019

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Distribution of contact loads in crushed zone between tunnel boring machine disc cutter and rock
SHI Yu-peng(史余鹏)1, 2, XIA Yi-min(夏毅敏)1, 2, TAN Qing(谭青)1, 2, ZHANG Yi-chao(张逸超)3, QIAO Shuo(乔硕)1, 2

1. State Key Laboratory of High Performance Complex Manufacturing, Central South University,Changsha 410083, China;
2. College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;
3. Patent Examination Cooperation Sichuan Center of the Patent Office, SIPO, Chengdu 610000, China

Abstract:The construction efficiency and quality of tunnel boring machines (TBMs) is largely determined by the service life of cutting tools, which is the result of contact loads in the crushed zone between cutter ring and rock. In this paper, a series of rock breaking tests were conducted with a 216 mm diameter disc cutter and concrete samples. Based on the superposition principle, the distribution of contact loads between disc cutter and rock were obtained by using the truncated singular value decomposition (TSVD). The results show that both the peak value and the whole numerical distribution of the radial strains on the cutter ring increase with the increase of the penetration. The distribution curves of the contact loads show an approximate parabola going downwards, which indicates contact loads are more concentrated. The front non-loading area with a ratio from 1.8% to 5.4% shows an increasing trend with the increase of penetration. However, the change of rear non-loading area is not obvious. It is believed that the conclusions have guidance for the study of rock breaking mechanism and manufacturing process of the disc cutter.

 

Key words: disc cutter; contact loads; superposition principle; non-loading area

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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