基于断裂力学的TBM撑靴液压缸O形圈断裂分析  

Analysis for Fracture of O-ring in Hang Hydraulic Cylinder of TBM Based on Fracture Mechanics

作　　者：李琳[1] 张峰榕 陶建峰[1] 刘成良[1] 

机构地区：[1]上海交通大学,上海200240

出　　处：《中国机械工程》2016年第12期1563-1567,共5页China Mechanical Engineering

基　　金：国家重点基础研究发展计划(973计划)资助项目(2013CB035403);国家自然科学基金资助项目(51375297);国家高技术研究发展计划(863计划)资助项目(2012AA041803);长安大学高速公路施工机械陕西省重点实验室开放基金资助项目(2014G1502044)

摘　　要：为研究全断面岩石隧道掘进机(TBM)的撑靴液压缸中O形圈的断裂原因,采用断裂力学分析了不同泊松比和初始裂纹情况下,O形圈可承受的最大应力,并采用ANSYS仿真分析了在某型号TBM实际工作情况下的O形圈的受力情况。结果表明,在TBM工作过程中,由于工作条件的复杂,O形圈的局部应力会超出裂纹迅速扩展时能够承受的最大应力,进而使O形圈断裂。根据理论分析和仿真结果得出,为了避免O形圈断裂,TBM撑靴液压缸的O形圈应严格控制微裂纹并选择较大泊松比。To study the causes for the fracture of the O-ring in the hang hydraulic cylinder of a TBM,the maximum stress which O-ring might withstand was analyzed with fracture mechanics under different Poisson＇s ratios and the initial cracks.Stress distribution of the O-ring was simulated under the actual working conditions of TBM using ANSYS.The analysis results show that in the process of practical work of the TBM,due to the complicated working conditions,the local stress of O-ring will beyond the maximum stress that may sustain before the crack rapidly propagates and it will result in the fracture of O-ring.It indicates that a larger Poisson＇s ratio of O-ring of hang hydraulic cylinder may be chosen in order to avoid the fracture based on the theoretical analyses and simulation results and the initial crack must be carefully controlled.

关 键 词：全断面岩石隧道掘进机 断裂力学 O形圈 有限元仿真 

分 类 号：TP182[自动化与计算机技术—控制理论与控制工程]