盾构机T形焊接结构的纯弯曲疲劳寿命研究  

Fatigue Life Study on Pure Bending of T-welded Component of Shield Machine

作　　者：武彦杰[1] 覃寿同[1] 赵冰清[1] 熊李依[1] 

机构地区：[1]郑州大学,郑州450001

出　　处：《机械设计与制造》2012年第8期124-125,共2页Machinery Design & Manufacture

摘　　要：虽说盾构机刀盘的失效主要是刀盘和刀具的磨损,但是破坏力最强的还是疲劳裂纹导致的断裂甚至是刀盘的解体。T形焊接结构是盾构机刀盘的一个关键结构,盾构机刀盘的疲劳寿命在很大程度上取决于关键结构的疲劳寿命。通过对该T形焊接结构的纯弯曲疲劳试验,得出疲劳寿命值,经过拟合得出该结构的S-N曲线,并基于ANSYSWorkbench对该结构进行仿真分析,揭示了该结构的一些疲劳寿命特性,实验结果验证了这些特性的正确性,为以后的研究提供了理论和实际支持。Though the failure of the shield cutter is because of the wear and tear of cutter and cutting tool,the most destructive failure is the crack which may lead to the fracture or collapse of the cutter.The t-welded component is a crucial component of shield machine cutter,which fatigue life may seriously affect the fatigue life of hard rock shield machine cutter.Through fatigue life experiment of t-welded component the fatigue life value is obtained,then the S-N curve is obtained by fitting,and the fatigue life characteristics of the component are revealed based on ANSYSWorkbench simulation.The experimental results verify the correctness of these features,which provide a theoretical and practical support for the future study.

关 键 词：疲劳寿命 焊接 ANSYSWORKBENCH S-N曲线 

分 类 号：TH16[机械工程—机械制造及自动化] TU621[建筑科学—建筑技术科学]