深水海底管道全尺寸压溃试验及数值模拟

针对深水海底管道压溃问题，研制了深水海底管道屈曲试验装置，该装置可承受水压43MPa，全长11．5m，直径1．6m．使用该装置设计并开展了全尺寸管道压溃试验．利用ANSYS软件建立三维圆柱壳模型进行管道压渍数值模拟分析，并将试验结果与数值模拟结果进行对比，来研究径厚比、初始凹坑缺陷、初始椭圆度缺陷等因素对管道压溃的影响．结果表明，管道压溃载荷随着径厚比的增大而显著降低，单个点状凹坑缺陷对于管道压溃载荷影响较小，初始椭圆度缺陷则明显降低了管道的压溃载荷．

Full-Scale Collapse Test and Numerical Simulation of Deepwater Pipeline

To solve the problem of collapse of deepwater pipeline,deepwater pipeline buckling experimental equip-ment was designed and manufactured with the maximum pressure of 43 MPa,the total length of 11.5 m and the di-ameter of 1.6 m.With the equipment,lots of full-scale pipe collapse tests were designed and done.ANSYS software was used to build a 3-dimentional cylindrical shell model for numerical simulation of pipe collapse.The experimental results were compared with the simulation results to study the factors in influencing pipe collapse.The study results show that pipe collapse load significantly increases with the decrease of the diameter-thickness ratio of the pipe.Single point defect has little effect on pipe collapse load,but initial ovality defect reduces pipe collapse load.