Dynamic Buckle Propagation in Submarine Pipelines

在提出的研究中，将使用数值，实验和分析方法相结合的方法来研究海底管道中屈曲传播和停止的动力学。研究的目标包括提高对卡扣扩展和卡扣现象的理解，并开发相对简单的模型，以便在实践中用于设计安全高效的管道系统。这项研究将包括三个主要任务。在任务1中，管道屈曲的传播和停止将通过一个三维，高精度的有限元模型来研究，该模型将考虑周向变形和纵向弯曲和剪切变形所消耗的能量。任务2将涉及动态条件下具有代表性的管道避雷器系统的实验测试。最后，任务3将处理简化模型的开发，这些模型将以可接受的精度表示影响屈曲传播和停滞现象的主要因素的影响和相对重要性。这些简化的模型主要用于实际设计目的。这项研究将提供的结果将导致开发更经济、更有效的海上管道系统设计，从而提高稳定能源的可用性。

In the proposed research, the dynamics of buckle propagation and arrest in submarine pipelines will be investigated using a combination of numerical, experimental, and analytical approaches. The objectives of the research include the advancement of the understanding of the buckle propagation and arrest phenomena, and the development of relatively simple models which could be used in practice to design safe and efficient pipeline systems. The research will consist of three main tasks. In Task 1, pipeline buckle propagation and arrest will be studied by means of a three-dimensional, highly accurate finite element model which will account for the energies dissipated by both circumferential deformations and longitudinal bending and shearing deformations. Task 2 will involve the experimental testing of representative pipeline-arrestor systems under dynamic conditions. Finally, Task 3 will deal with the development of simplifies models which will represent with acceptable accuracy the effects and relative importance of the major factors that influence the buckle propagation and arrest phenomena. These simplifies models are primarily intended for practical design purposes. This research will provide results that will lead to the development of more economical and efficient designs of offshore pipeline systems, thus enhancing the availability of a stable energy source.