Numerical simulation study on the effect of large explosive contact pipeline explosion on pipeline damage

In this study, the influence of the size of an explosive and pipeline parameters on pipeline damage caused by large explosives was analyzed via numerical simulation. The size of the contact surface, the thickness of the pipeline wall, the diameter of the pipeline diameter, and the internal pressure of the pipeline were investigated. The shape and length of the pipeline crevasse after the explosion were analyzed. The results show that when the size of the contact surface between the explosive and the pipeline increased in the axial and circumferential directions, the change trends of the shape and length of the pipeline crevasse were different. When the wall thickness of the pipeline increased, the size of the pipeline crevasse decreased. When the size of the contact surface of the explosives and pipelines was small, no correlation existed between the size of the pipeline crevasse and the diameter of the pipeline. However, when the contact surface size of the explosive and pipeline was large, the size of the pipeline crevasse increased with the diameter of the pipeline. The increase in internal pressure inside the pipeline had no significant effect on the size of the pipeline crevasse. These results can provide a theoretical basis and reference for pipeline safety and accident investigation.