摘要：Due to the complicated conditions of the seabed, pipelines may have multiple free spans adjacent to each other, forming a multispan pipeline. Because a submarine pipeline is a continuous structure, the vortex-induced vibration (VIV) of free spans can produce interactive effects. However, little attention has been focused on methods for classifying multispan interactions and on the interaction mechanism. This paper therefore investigates the interaction mechanism of multispan pipelines from static and dynamic perspectives, and two multispan classification methods based on modal frequencies and energy transfer are proposed. For static analysis, the natural frequencies of multispan pipelines under different conditions are calculated, and the changes in frequency are used to characterize the influences of different spans. For dynamic analysis, a multispan vibration prediction approach considering the fluid-structure-sediment interaction is constructed, and the dynamic characteristics of the pipeline undergoing VIV are analysed. The mutual influence between spans is judged by the energy transfer between different pipe sections. In addition, a series of experimental tests on a multispan pipeline with sediment coupling is carried out to verify the proposed multispan classification methods for submarine pipelines.

关键字：Vortex-induced vibration; Multispan pipeline; Natural frequency; Energy transfer; Pipe-sediment interaction

ISSN号：0141-1187

卷、期、页：卷: 120

发表日期：2022-03-01

影响因子：2.978900

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,地学领域高质量科技期刊分级目录（国外T2）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：APPLIED OCEAN RESEARCH

参与作者：徐万海,贾昆,马烨璇,宋志友

第一作者：王莹莹

论文类型：期刊论文

论文概要：徐万海,贾昆,马烨璇,王莹莹,宋志友，Multispan classification methods and interaction mechanism of submarine pipelines undergoing vortex-induced vibration，APPLIED OCEAN RESEARCH，2022，卷: 120

论文题目：Multispan classification methods and interaction mechanism of submarine pipelines undergoing vortex-induced vibration