全断面隧道掘进机刀盘裂纹尖端应力强度因子收敛性分析

中国机械工程

全断面隧道掘进机刀盘裂纹尖端应力强度因子收敛性分析

凌静秀1;孙伟2;杨晓静1;童昕1

1.福建工程学院机械与汽车工程学院,福州，350118
2.大连理工大学机械工程学院，大连，116024

出版日期:2017-05-25 发布日期:2017-05-25
基金资助:
国家重点基础研究发展计划(973计划)资助项目(2013CB035402);
福建省科技创新平台建设项目（2014H2002）；
福建省自然科学基金资助项目（2016J01722,2017J01675）；
福建工程学院科研启动基金资助项目（GY-Z160048）

Convergence Analysis of Stress Intensity Factor at Crack Tips for TBM Cutterheads

LING Jingxiu1;SUN Wei2;YANG Xiaojing1;TONG Xin1

1.School of Mechanical and Automotive Engineering,Fujian University of Technology,Fuzhou,350118
2.School of Mechanical Engineering,Dalian University of Technology,Dalian,Liaoning,116024

Online:2017-05-25 Published:2017-05-25

摘要/Abstract

摘要： 针对全断面隧道掘进机刀盘裂纹损伤及寿命预测等工程问题，提出了基于子模型技术的应力强度因子求解方法，并用含裂纹的矩形钢板对该方法进行了验证，分析了裂纹网格参数对刀盘裂纹尖端应力强度因子的收敛性影响。结果表明，钢板的应力强度因子数值和理论计算结果最大相对误差为3.6%。同时得到了保证刀盘应力强度因子求解精度和效率的裂纹单元网格参数，为结构的裂纹扩展寿命预测提供了参考。

关键词: 全断面隧道掘进机刀盘, 裂纹, 应力强度因子, 子模型技术, 有限元法

Abstract: Aiming at the engineering problems such as crack damage and life prediction of TBM cutterheads, a solution method of stress intensity factors was proposed based on the sub-model technique, and it was validated by a rectangular steel plate with a crack. Then the convergence effects of crack mesh parameters on stress intensity factors at the crack tips of cutterheads were analyzed. The analysis results show that the maximum relative errors of numerical and theoretical results are as 3.6%. Besides, the crack element mesh parameters were obtained that ensured both of the accuracy and efficiency for cutterhead stress intensity factors solutions, which may provide a reference for the crack growth life prediction of structures.

Key words: tunnel boring machine(TBM) cutterhead, crack, stress intensity factor, sub-model technique, finite element method(FEM)

中图分类号:

TP391.9

凌静秀, 孙伟, 杨晓静, 童昕. 全断面隧道掘进机刀盘裂纹尖端应力强度因子收敛性分析[J]. 中国机械工程.

LING Jingxiu, SUN Wei, YANG Xiaojing, TONG Xin. Convergence Analysis of Stress Intensity Factor at Crack Tips for TBM Cutterheads[J]. China Mechanical Engineering.

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