盾构螺旋输送机的螺旋轴疲劳断裂问题研究  

Fatigue Crack Research on Spiral Shaft of Screw Conveyer in Shield Machine

作　　者：刘学[1,2] 赵海鸣 LIU Xue;ZHAO Haiming(College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;China Railway Construction Heavy Industry Co., Ltd., Changsha 410100, China)

机构地区：[1]中南大学机电工程学院,长沙410083 [2]中国铁建重工集团有限公司,长沙410100

出　　处：《机械工程师》2019年第9期40-41,44,共3页Mechanical Engineer

基　　金：国家科技支撑计划(2013BAB10B00)

摘　　要：针对盾构机长期工作造成的螺旋输送机的螺旋轴疲劳断裂,基于Fe-safe疲劳分析软件提出了一种预估螺旋轴疲劳寿命的方法。首先建立螺旋轴的静应力的有限元分析模型,根据分析结果确定了应力集中区域。其次,将不同重力方向对应的静应力分析结果代入Fe-safe疲劳分析软件,然后设置螺旋轴的疲劳材料参数,并采用BrownMiller算法计算疲劳寿命。疲劳分析结果表明螺旋轴的疲劳寿命大于107次旋转。最后,通过螺旋输送机的实际运行数据证明了疲劳分析结果的正确性。Spiral shaft of the screw conveyor may be fatigued and broken if the shield machine has worked long time. Based on Fe-safe software for fatigue analysis, a method is proposed to estimate the fatigue life of the spiral shaft in this paper. Firstly, the static stress model based on finite element for the spiral shaft is established, and the stress concentration region is ensured according to the analysis results of the stress. Secondly, the static stress results corresponding to different gravity directions are put into Fe-safe software, and then the fatigue material parameters of spiral shaft are input. The fatigue life is calculated by the BrownMiller algorithm. The fatigue analysis results show that the fatigue life of spiral shaft is more than 107 times. Finally, the results of fatigue analysis are verified by the operation data of screw conveyor.

关 键 词：盾构机 螺旋输送机 有限元 疲劳寿命 Fe-safe 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]