Numerical analysis of partial impact forces of offshore submerged floating tunnel encountered submarine slide hazards

Fan, Ning; Jiang, Jianxiong; Guo, Lin; Lin, Heng; Wang, Le

doi:10.1016/j.oceaneng.2022.112903

Cited by 4 publications

(5 citation statements)

References 43 publications

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“…(iv) based on the previous study (Fan et al, 2022b), the deviation coefficients D H-p = 0.57 and D V-p = 1.60;…”

Section: Evaluation Approach and Application Casementioning

confidence: 69%

“…In recent years, the computational fluid dynamics (CFD) simulation approach has been widely used in the studies of submarine slide motion (e.g., Gauer et al, 2005;Acosta et al, 2017;Fan et al, 2022a;Fan et al, 2022b) and its interaction with structures (e.g., Zakeri et al, 2009;Zakeri and Hawlader, 2013;Liu et al, 2015;Fan et al, 2018;Fan et al, 2019;Qian and Das, 2019;Sahdi et al, 2019;Fan et al, 2020a;Guo et al, 2021;Guo et al, 2022), due to the numerical solution stability and speed advantages on the multi-phase coupled flow field. To reproduce the influence of submarine slides on submerged floating tunnels in the underwater environment, the ANSYS-CFX numerical software based on the CFD simulation approach is employed in this study.…”

Section: Cfd Simulation Approach and Setupmentioning

confidence: 99%

“…The impact forces of submerged floating tunnels with circle crosssections encountered the submarine slide hazards have been discussed by Fan et al (2022b). The influence range of the slide mass thickness on the peak impact forces was found limited to H t /D of approximately -1.5 ~8.0 based on the bottom edge of the tunnel (where the negative value indicates a downward direction).…”

Section: Comparison With Circle Cross-section Tunnelmentioning

confidence: 99%

“…If the slide mass thickness is in this range, the impact forces can be regarded as a partial impact state, and the impact forces are in a flooded state when the thickness is greater than the upper limit of this range. An evaluation approach for the impact forces caused by submarine slides on circle submerged floating tunnels was provided (Fan et al, 2022b) and expressed as:…”

Section: Comparison With Circle Cross-section Tunnelmentioning

confidence: 99%

“…However, frequent and widely distributed submarine slide, as an important environmental load factor (Jia et al, 2016;Dong et al, 2017;Wang et al, 2018;Nian et al, 2019;Fan et al, 2022a;Tian et al, 2023), has not been considered. Until recent years, the study of Fan et al (2022b) first analyzed the impact action of submarine slides with different thicknesses on circular submerged floating tunnels, and an evaluation approach for the impact forces of submarine slides was proposed.…”

Section: Introductionmentioning

confidence: 99%

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Feasibility of submerged floating tunnel with polygonal cross-sections — investigation from a viewpoint of submarine slide hazards

Fan

et al. 2023

Front. Mar. Sci.

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Recently, submerged floating tunnels have generated a lot of interest due to their unique cross-water traffic benefits. However, the destructive threat of submarine slide hazards was not fully considered in the design scheme of submerged floating tunnels, in particular to the feasibility of applying various cross-section forms on land to submerged floating tunnels under that hazard influence. This study mainly investigates the load effect of submerged floating tunnels with polygonal cross-sections (comprising three types: square, hexagon, and octagon) under the impact of submarine slides, via a computational fluid dynamics (CFD) approach. Results show that the impact forces produced by submarine slides on submerged floating tunnels are significant (e.g., submarine slides with a velocity of 4 m/s may produce a force level near 1×105 N/m), where the horizontal impact force components should be given priority consideration based on the general working environment of submerged floating tunnels. Compared with typical circle tunnels, polygonal tunnels suffer higher impact forces, and the polygonal types with fewer edges show a greater impact force. Finally, a simplified force evaluation approach for the submerged floating tunnel with polygonal cross-sections is proposed for guiding the relevant engineering design.

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“…(iv) based on the previous study (Fan et al, 2022b), the deviation coefficients D H-p = 0.57 and D V-p = 1.60;…”

Section: Evaluation Approach and Application Casementioning

confidence: 69%