输油管道中缺陷快速定位的应力波技术

Stress wave technique for rapid positioning defects in oil pipeline

为解决输油管道中裂纹缺陷难于快速定位的问题,基于应力波的特性研究应力波无损检测技术在管道缺陷检测中的应用。借助ANSYS AUTODYN建立多组动态仿真模型,计算并分析仿真结果数据,对比光滑无裂纹缺陷的管道与含有裂纹缺陷管道的应力波传播规律。经过分析应力波的传播变化过程,得出管道裂纹对应力波的干扰规律,进而得到2种利用应力波进行无损检测的方法:一是沿着管道轴向布置测点的检测方法;二是在管道截面布置测点的检测方法。

In order to solve the problem that it is difficult to position the oil pipeline defects rapidly,a new nondestructive detection method based on stress wave is studied utilizing the characteristics of stress wave. Many dynamic simulation models are built using ANSYS AUTODYN to calculate and analyze the simulation result data. The stress wave propagation rule is compared between the smooth pipeline without crack defects and the pipeline with crack defects. The propagation and change process of stress wave is analyzed,the interference rule of the pipeline crack in the stress wave is obtained,and the nondestructive detection method using stress wave is obtained： one method is to arrange the measuring points along the pipeline axis,the other is to arrange the measuring points at pipeline cross sections.