Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (8): 1144-1148.DOI: 10.12068/j.issn.1005-3026.2016.08.017

• Mechanical Engineering • Previous Articles     Next Articles

Split Cutter Head Reliability Calculation Based on Crack Failure Regions

SUN Wei, ZHU Ye, LING Jing-xiu, HUO Jun-zhou   

  1. School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China.
  • Received:2015-03-23 Revised:2015-03-23 Online:2016-08-15 Published:2016-08-12
  • Contact: ZHU Ye
  • About author:-
  • Supported by:
    -

Abstract: A calculation model of reliability was developed based on the method of dividing crack regions on the surface of TBM (tunnel boring machine )cutter head. The dangerous area was divided on the basis of different stress and structure, and the stress amplitude spectrum was obtained by rain-flow counting. To calculate the reliability, a model of cracks extension was built with crack fatigue damage accumulation as basic variable. For example, dangerous areas of the TBM cutter head used on Zhongtianshan tunnel engineering were divided into 10 according to crack-resistance, and the calculated reliability in TBM tunneling for 4km was consistent with the reality. At this stage, fatigue damage most likely occurred on cutter saddle welding, therefore, measures should be taken to prevent the crack growth during repairs.

Key words: cutter head cracks, reliability, cutter head region division , stress amplitude

CLC Number: