深水高强厚壁海底管道抗压溃能力评估方法研究

摘要

深水海底管道一般采用高强钢厚壁管来克服其承受的静水压力，基于高压舱评估其抗压溃能力是一个重要的手段。由于试件两端采用加强板固定，改变了服役环境下管道的边界条件，因此需要分析刚性边界对其抗压溃能力的影响。采用数值模拟方法给出管道服役和试验环境下的抗压溃能力，通过两者的比值，定量给出刚性边界的影响。结合高压舱测试数据，形成了一套高强厚壁管道抗压溃能力的评估方法，可以评价管道的抗压溃能力。%The deepwater high-strength pipeline with small radius-thickness ratio is usually used to overcome the hy-drostatic pressure and its buckling evaluation can be achieved base on the hyperbaric chamber experiment. There is a great difference between the specimen in laboratory and the pipeline in the service for the specimen is fixed by use of rigid plate. It is necessary to analyze this influence caused by the rigid boundary condition. The ratio of buckling bear-ing capability of the specimen in laboratory and the pipeline in the service was calculated by numerical simulation method,which can evaluate the influence of the rigid boundary condition. Based on the ratio and the buckling bearing capability obtained from specimen,the buckling bearing capability of online pipeline can be achieved. The method has been used to evaluate the buckling bearing capability of deepwater high-strength pipeline with small radius-thickness ratio.