Investigation of offshore landslides impact on bucket foundations using a coupled SPH-FEM method

被引:12
|
作者
Wang, Zehao [1 ]
Zheng, Defeng [2 ]
Guo, Xingsen [3 ]
Gu, Zhongde [1 ]
Shen, Yueqiang [1 ]
Nian, Tingkai [1 ]
机构
[1] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China
[2] Liaoning Normal Univ, Liaoning Key Lab Phys Geog & Geomat, Dalian 116029, Peoples R China
[3] UCL, Dept Civil Environm & Geomatic Engn, London WC1E 6BT, England
基金
中国国家自然科学基金;
关键词
Offshore landslide; Coupled SPH-FEM method; Impact effect; Bucket foundation; Underwater data center; DEBRIS FLOW IMPACT; FLUID-STRUCTURE INTERACTION; PARTICLE HYDRODYNAMICS; SUBMARINE LANDSLIDES; FORCES; SIMULATION; PIPELINES; SURFACE; WATER; MODEL;
D O I
10.1186/s40677-024-00266-9
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
BackgroundAs the exploitation of marine resources intensifies, the impact of submarine landslides on underwater structures has become a significant issue. Existing research primarily focuses on the impact on pipelines, often neglecting the actual deformation and mechanical response of underwater structures under impact loads in numerical simulations, thus complicating the evaluation of the reliability of these engineering structures in extreme conditions. Moreover, the dynamic response of bucket foundations, a common form of underwater base, under the effect of submarine landslide impacts remains unclear.MethodsTo address this knowledge gap, we have developed a fluid-structure coupling system that employs the coupled Smoothed Particle Hydrodynamics (SPH)-Finite Element Method (FEM) to investigate a single impact process and analyze the displacement response of bucket foundations within a water-offshore landslide-bucket foundationsubgrade context. The accuracy of this developed method has been systematically verified through comparisons with previous experimental and numerical results.ResultsDuring a submarine landslide impact event, the impact force demonstrates a distinct decrease followed by stabilization, and the displacement response of the bucket foundation exhibits a rebound effect after reaching its maximum value. Furthermore, we conducted an extensive analysis of different impact angles for underwater data centers equipped with multi-bucket foundations. Our study revealed that group-bucket foundations experience a combined translation-turnover failure when subjected to submarine landslide impacts, and the most unfavorable scenario for such impact is identified. The research introduces a novel numerical simulation approach for investigating the impact of submarine landslides on complex underwater structures.
引用
收藏
页数:15
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