摘要
为确定挖掘机具接触埋地输气管道斗尖产生的载荷,分别对液压反铲挖掘机斗尖静载和冲击两种方式作用于输气管道的动静态响应进行了现场测试。基于动态测试数据,采用ADAMS多体动力学软件,结合STEP函数和Script脚本仿真控制技术,将挖掘机动力传递过程转化为油缸的位移控制和速度控制,获得五齿和单齿接触输气管道极端工况下挖掘机斗尖动载荷时程曲线。最后将载荷时程曲线导入ANSYS/LS-DYNA商业有限元软件中,对管道的动态响应进行了有限元分析,其动态应变响应与现场测试数据吻合较好。试验与计算结果表明:所提出的基于试验和数值模拟相结合确定挖掘机具斗尖载荷的方法是可行的,研究结果可为埋地输气管道在挖掘机具作用导致的机械损伤定量评估提供准确可靠的载荷数据。
In order to determine the dynamic load of bucket tip of an excavator during contacting a buried gas pipeline, dynamic and static response tests were performed to reflect two action modes including static load and impact of a hydraulic backhoe excavator＇s bucket tip contacting the pipeline. Load time-history curves were simulated with ADAMS multi-body dynamics software according to the dynamic test data. STEP function and the script control technology were combined and used, the dynamic force transfer process of the excavator was converted into the displacement and speed control of cylinders, then the dynamic load time-history curves of the bucket tip of the extreme were obtained during the excavator contacting the pipe with five-tooth and one-tooth. Finally, the dynamic load time-history curves were induced into the finite element commercial software ANSYS/LS-DYNA, the dynamic response of the pipe was analyzed, the dynamic strain response of the pipe agreed well with field test results. The test and calculation results showed that the proposed method to determine the bucket tip load of a mining machinery based on the combination of test and numerical simulation is feasible, and the research can provide correct data for quantitative assessment of mechanical buried gas pipeline under mining machinery actions. damage of a
出处
《振动与冲击》
EI
CSCD
北大核心
2014年第17期39-46,共8页
Journal of Vibration and Shock
基金
国家科技支撑计划项目(2011BAK06B01-11)
中国石油西气东输管道公司项目(XGSGL01423)
关键词
挖掘机具
埋地输气管道
动载荷
动态测试
数值模拟
excavator
buried gas pipeline
dynamic load
dynamic test
numerical simulation
