埋地输油管道对爆破振动的动力响应

为了控制爆破振动对油气管道的影响，利用ANSYS/LS-DYNA软件对埋地管道在爆破作用下不同方向的受力过程进行数值模拟，建立埋地管道三维有限元模型，采用多物质流固耦合算法模拟爆破过程。结果表明:基于流固耦合方法模拟得到的振速与现场实测结果基本一致，利用该模拟方法研究爆破振动对埋地输油管道的影响是可行的。经过爆破模拟分析,得到埋地管道上的有效应力变化规律。迎爆面和背爆面受到的应力远高于管顶、管底受到的应力，且迎爆面的有效应力大于背爆面，说明迎爆面是最容易发生变形的；管顶和管底位于管道的中轴面上，受到的应力较小，变形也较小。

Dynamic Response of Buried Oil Pipeline to Blasting Vibration

In order to control the impact of blasting vibration on oil and gas pipelines, software ANSYS/LS-DYNA was used to numerically simulate the force process of buried pipelines under blasting action, establish a three-dimensional finite element model of buried pipelines, and use multi-material fluid-solid coupling algorithm to simulate the blasting process. Results show that the vibration velocity obtained based on the fluid-solid coupling method is basically consistent with the field measured results. It is feasible to use the simulation method to study the impact of blasting vibration on the buried oil pipeline. Change laws of effective stress on buried pipeline were obtained by blasting simulation analysis. The effective stress on the front explosion surface and the back explosion surface is much higher than that on the top and bottom of the tube, and the effective stress of the front explosion surface is greater than the back explosion surface, indicating that the front explosion surface is the most prone to deformation. The top and bottom of the pipe are located on the central axis of the pipe, so the stress is small and the deformation is also small.