利用 OpenFOAM 建立半圆形防波堤周围流体-结构-海床相互作用的二维单向耦合模型

IF 4.3 2区 工程技术 Q1 ENGINEERING, OCEAN Applied Ocean Research Pub Date : 2024-10-01 DOI:10.1016/j.apor.2024.104249
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引用次数: 0

摘要

半圆形防波堤因其重量轻、底座宽、抗倾覆和抗滑动性能优越而备受青睐,其波浪力和流体力学性能一直是研究的重点。尽管由于海床不稳定性而导致失败的案例屡见不鲜,但文献中缺乏对这些结构周围海床响应和稳定性的数值研究。本研究建立了 OpenFOAM 模型,对半圆形防波堤附近的水动力相互作用、结构动力学、海床固结和液化潜力进行二维数值研究,以单向耦合的方式解决复杂的流体-结构-海床相互作用问题。采用了一种确定孔隙流体可压缩性的新方法,该方法综合了海床内的静地应力、大气压力和波浪引起的过大孔隙压力。数值结果表明,在部分饱和的情况下,海底反应对孔隙空气的体积模量很敏感,可以观察到孔隙压力减小、垂直有效应力增大和水平有效应力减小。进一步的数值分析表明,防波堤最脆弱的部分出现在沉箱面向波浪的一侧,建议在施工期间对该处进行加固测量。在防波堤前方观察到一个明显的液化区,与上渗区域相对应,这归因于水动力相互作用和半圆形防波堤传递的直接应力作用的综合效应。
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Two-dimensional one-way coupled modelling for fluid-structure-seabed interactions around a semicircular breakwater using OpenFOAM
Semicircular breakwaters, preferred for their lighter weight, wider base and superior resistance to overturning and sliding, have seen focused research on wave forces and hydrodynamic performance. Despite documented failures due to seabed instability, numerical examinations of the seabed response and stability around these structures are lacking in the literature. This study establishes an OpenFOAM model to numerically investigate hydrodynamic interactions, structural dynamics, seabed consolidation and liquefaction potential near a semicircular breakwater in two-dimensional, addressing complex fluid–structure-seabed interactions in a one-way coupling manner. A novel method for determining the compressibility of the pore fluid has been implemented, which integrates geostatic stress, atmospheric pressure and wave-induced excessive pore pressure within the seabed. The numerical results indicate that seabed responses are sensitive to the bulk modulus of pore air in partially saturated cases, where a decrease in pore pressure, an increase in the vertical effective stress and a decrease in the horizontal effective stress are observed. Further numerical analysis reveals that the most vulnerable part of the breakwater appears on the wave-facing side of the caisson, where reinforcement measurements are recommended during construction. A pronounced liquefaction zone is observed ahead of the breakwater, corresponding to the area with upward seepage, which is attributed to the combined effect of hydrodynamic interactions and direct stress action transferred from the semicircular breakwater.
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来源期刊
Applied Ocean Research
Applied Ocean Research 地学-工程:大洋
CiteScore
8.70
自引率
7.00%
发文量
316
审稿时长
59 days
期刊介绍: The aim of Applied Ocean Research is to encourage the submission of papers that advance the state of knowledge in a range of topics relevant to ocean engineering.
期刊最新文献
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