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首页> 外文期刊>Journal of Fluids and Structures >A discrete-modules-based frequency domain hydroelasticity method for floating structures in inhomogeneous sea conditions
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A discrete-modules-based frequency domain hydroelasticity method for floating structures in inhomogeneous sea conditions

机译：基于离散模块的频域水域水域水域水域水域水域水域水域水域浮动结构

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摘要

Based on the three-dimensional (3D) potential theory and finite element method (FEM), this paper proposes a new numerical method for hydroelastic predictions of floating structures in inhomogeneous seabed and wave field conditions. The continuous floating structure is first discretized into rigid modules connected by elastic beams. The motion equations of the entire floating structure are established according to the six degrees of freedom (6DOF) motions of each module by coupling the hydrodynamics of the modules with the structural stiffness matrix of the elastic beams in the frequency domain. By applying different wave excitation forces onto different modules, this discrete-modules based method then uniquely realizes application of various wave excitation forces onto different modules of the structures in inhomogeneous waves. The hydroelastic responses of a plate and a Wigley hull under an even and uneven seabed using the proposed method are verified against the results from the published model tests and the conventional 3D hydroelastic method. Finally, the effects of inhomogeneous waves on the distributions of the bending moment, shear force and vertical displacements of the freely floating plate are investigated. The results show that the inhomogeneity of waves may induce about 2-3 times increase of the force responses in a specific wave frequency. (C) 2017 Elsevier Ltd. All rights reserved.
机译：基于三维（3D）电位理论和有限元方法（FEM），本文提出了一种新的液体海底浮动结构浮动结构的新数值方法。首先将连续的浮动结构离散到通过弹性束连接的刚性模块中。通过将模块的流体动力学与频域中的弹性束的结构刚度矩阵耦合，根据每个模块的六个自由度（6dof）运动来建立整个浮动结构的运动方程。通过将不同的波激发力施加到不同的模块上，基于离散模块的方法，然后唯一地实现各种波激发力的应用到非均匀波的结构的不同模块上。使用该方法在偶数和不平坦的海底下，使用该方法的液晶壳的液体反应与已发表的模型试验的结果和传统的3D液压弹性法验证。最后，研究了对自由浮板的弯曲力矩，剪切力和垂直位移的分布的非均匀波的影响。结果表明，波的不均匀性可以诱导特定波频率中力响应的增加约2-3倍。 （c）2017 Elsevier Ltd.保留所有权利。

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