基于SPH方法的埋地PE燃气管道挖掘破坏数值模拟研究

Numerical simulation study on excavation failure of buried PE gas pipeline based on SPH method

摘要:

为弥补有限元法在埋地燃气管道挖掘破坏研究中的不足，基于光滑粒子流体动力学法（SPH），建立挖齿-土体-管道相互作用动力学模型，采用FORTRAN编程实现SPH计算程序，并结合算例分析挖齿挖掘过程挖齿-土体-管道实时状态及管道动态响应，最终得到椭圆度、应力应变分布等重要参数。结果表明：SPH方法可有效分析埋地管道挖掘破坏全过程，研究结果为挖齿-土体-管道等多方接触或冲击领域提供新的研究方法。

Abstract:

To make up for the deficiency of the grid-based numerical method in calculating the large deformation of buried gas pipeline caused by excavation failure,a dynamic model of excavation tooth-soil-pipe interaction was established based on the smoothed particle hydrodynamics method (SPH).The interaction force between the excavation tooth,soil and pipe was adjusted,and the corresponding SPH calculation program was realized by FORTRAN programming.An example was given to analyze the real-time state of tooth-soil-pipe and the dynamic response of pipeline during the excavation process,and the important parameters such as ellipticity and stress-strain distribution were obtained.The results showed that the SPH method can effectively analyze the whole process of excavation failure of the buried pipeline,and it provides a new calculation method for the research on this field.