海底管道斜裂纹关键因素敏感性分析

The Key Factors’ Sensitivity Analysis of Inclined Crack in Submarine Pipeline

摘要: 斜裂纹是海底管道发生安全事故的主要因素之一。基于断裂力学理论，采用数值计算法建立管道模型边界条件，根据环境条件加载环境载荷，从管道内压、壁厚、裂纹长度、管道直径、直径与壁厚比等方面计算了应力强度因子K，分析了其对管道强度的敏感性影响，对后续含斜裂纹压力管道的深入研究具有一定的基础作用。

Abstract: Inclined crack is one of the primary factors which results in accident of submarine pipeline. Based on the fracture mechanics theory, we take the numerical method to establish the pipeline model boundary conditions. Then according to the environmental conditions loading environmental load, and calculated the stress intensity factor K, from the pipeline pressure, wall thickness, crack length, pipe diameter, diameter and wall thickness ratio and so on, we also analyzed its sensitivity to pipeline strength. These have a certain foundation effect on the subsequent in-depth study of the pipe with oblique crack pressure.