【作者】 徐涛龙； 姚安林； 李又绿； 蒋宏业； 曾祥国；

【Author】 XU Tao-long;YAO An-lin;LI You-lü;JIANG Hong-ye;ZENG Xiang-guo;School of Oil & Natural Gas Engineering,Southwest Petroleum University;College of Architecture and Environment,Sichuan University;

【机构】 西南石油大学石油与天然气工程学院； 四川大学建筑与环境学院；

【摘要】 液压反铲式挖掘机被认为是当前埋地输气管道最主要的第三方威胁之一。为确定挖掘机斗齿撞击管道的动载荷及动载系数,设计实施了管道全尺寸动静态挖掘试验,利用ADAMS软件建立管道-土壤-挖掘机相互作用的多体动力学模型,基于各油缸位移及压力测试数据实现挖掘过程的再现仿真,其中需设定多体动力学系统的材料属性、约束及摩擦、接触、驱动力等信息,最终获得不同工况的斗尖挖掘力,以及因挖机运动部件间摩擦引起的能量耗散,评估不同工况下挖掘机的能量耗散率。研究可为定量评估埋地输气管道遭受地面挖掘机械的冲击损伤提供可靠的载荷参考,且为沿线第三方干扰的灾害防控给予数据支撑。更多还原

【Abstract】 Nowadays, backhoe hydraulic excavator is considered as one of the main third party threats to the buried gas pipeline. In order to determine the dynamic impact load and dynamic load coefficient when excavator bucket tooth impact on the pipe, the full scale static and dynamic pipe digging tests was designed and implemented in this paper. By using of ADAMS software, the pipelines-soil-excavator multi-body dynamics model was established, Based on the cylinder displacement and pressure test data, mining process of reproduction of simulation, which need to set the material properties, constraints, friction and contact, the driving force information for multi body dynamics system. Ultimately, the digging force magnitude in different conditions and the energy dissipation caused by the friction force between the moving parts were achieved, thus, the energy dissipation rate of excavator under different conditions could be assessed. The research may not only provide a reliable load reference to the quantitative assessment of buried gas pipeline damage that subjected to ground impact of mining machinery, but also give data support for disaster prevention and control of third party interference along the line.更多还原