Numerical simulation of hydrodynamic oscillation of side-by-side double-floating-system with a narrow gap in waves
Numerical simulation of hydrodynamic oscillation of side-by-side double-floating-system with a narrow gap in waves
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DOI：
10.1515/phys-2021-0021
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发表时间：
2021-01
期刊：
影响因子：
1.9
通讯作者：
Zhiyang Zhang;Weixing Liu;X. Zheng;Hengxu Liu;Ningyu Li
中科院分区：
文献类型：
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作者：
Zhiyang Zhang;Weixing Liu;X. Zheng;Hengxu Liu;Ningyu Li
摘要在海洋油气勘探和运输中，经常会遇到多浮式结构物并排作业的情况。在某些海况下，多浮体结构物之间存在强耦合，严重影响海上作业安全。因此，对多浮体结构物之间的相对运动和受力以及多浮体系统周围波浪高度的预测已成为一个热点问题。目前，双浮体系统的问题大多是基于线性势流理论。但是，当两浮体之间的差距宽度较小时，粘性和非线性的影响是不可忽略的，因此势流理论有很大的局限性。基于粘性流理论，利用FLOW3D有限差分求解程序，利用流体体积技术捕捉自由面，建立了三维数值波浪水池，并将波浪数值计算结果与理论解进行了比较。在此基础上，建立了窄间隙并列式双浮体系统的水动力学模型，详细分析了规则波作用下固定式双浮体系统窄间隙内的流场。研究了间隙共振的规律，为今后多浮体系统的研究提供了有价值的参考。
Abstract In offshore oil and gas exploration and transportation, it is often encountered that the multi-floating structures work side by side. In some sea conditions, there is a strong coupling between the multi-floating structures that seriously affects the safety of offshore operations. Therefore, the prediction of the relative motion and force between the multi-floating structures and the wave elevation around the multi-floating-system has become a hot issue. At present, the problem of double-floating-system is mostly based on linear potential flow theory. However, when the gap width between two floating bodies is small, the viscous and nonlinear effects are not negligible, so the potential flow theory has great limitations. Based on the viscous flow theory, using the finite difference solution program of FLOW3D and using volume of fluid technology to capture the free surface, a three-dimensional numerical wave basin is established, and the numerical results of the wave are compared with the theoretical solution. On this basis, the hydrodynamic model of side-by-side double-floating-system with a narrow gap is established, and the flow field in the narrow gap of the fixed double-floating-system under the regular wave is analyzed in detail. The law of the gap-resonance is studied, which provides valuable reference for the future research on the multi-floating-system.