[1]吴勉,凌静秀,成晓元,等.双裂纹损伤下TBM刀盘结构疲劳寿命分析[J].福建工程学院学报,2022,20(04):397-401.[doi:10.3969/j.issn.1672-4348.2022.04.015]
　WU Mian,LING Jingxiu,CHENG Xiaoyuan,et al.Fatigue life analysis of TBM cutter head structure under double crack damage[J].Journal of FuJian University of Technology,2022,20(04):397-401.[doi:10.3969/j.issn.1672-4348.2022.04.015]
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双裂纹损伤下TBM刀盘结构疲劳寿命分析()
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《福建工程学院学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第20卷
期数:
2022年04期
页码:
397-401
栏目:
出版日期:
2022-08-25

文章信息/Info

Title:
Fatigue life analysis of TBM cutter head structure under double crack damage
作者:
吴勉; 凌静秀; 成晓元; 王文景
福建工程学院机械与汽车工程学院
Author(s):
WU Mian;  LING Jingxiu;  CHENG Xiaoyuan;  WANG Wenjing
School of Mechanical and Automotive Engineering, Fujian University of Technology
关键词:
TBM刀盘; 双裂纹扩展; Paris公式; 疲劳寿命
Keywords:
TBM cutter head;  double crack propagation;  Paris formula;  fatigue life
分类号:
TH113
DOI:
10.3969/j.issn.1672-4348.2022.04.015
文献标志码:
A
摘要:
基于Paris 公式建立TBM 刀盘的裂纹扩展模型，利用Workbench 模拟裂纹的开裂过程，计算出其循环次数与应力强度因子。 并改变双裂纹的初始长度、距离、角度，分析多部位损伤时筋板的裂纹扩展寿命。 结果表明，裂纹的初始长度越长构件越容易失效，每增加2.5 mm 寿命将减少35%，而双裂纹距离对寿命的影响较小，在10%以内。 当裂纹方向和受力方向垂直时，构件容易失效，反之则对寿命的影响越小。 该研究可为刀盘设计过程中疲劳寿命领域提供参考。
Abstract:
Based on the Paris formula, the crack propagation model of the TBM cutter head was established, and the cracking process of the crack was simulated by Workbench, and the cycle times and stress intensity factor were calculated. The initial length, distance and angle of the double cracks were changed so as to analyze the crack propagation life of the rib when multiple parts are damaged. Results show that the longer the initial length of the crack, the more likely the component will fail, and the life will be reduced by 35% for every 2.5 mm increase, while the double-crack distance has less effect on the life, i.e., within 10%. When the crack direction is perpendicular to the force direction, the component is prone to failure, and otherwise, the impact on the life is smaller. This research can provide reference for the field of fatigue life in the design of cutter head.

参考文献/References:

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更新日期/Last Update: 2022-08-25