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首页> 外文期刊>International journal of computational methods >A Coupled Discrete-Finite Element Method for the Ice-Induced Vibrations of a Conical Jacket Platform with a GPU-Based Parallel Algorithm
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A Coupled Discrete-Finite Element Method for the Ice-Induced Vibrations of a Conical Jacket Platform with a GPU-Based Parallel Algorithm

机译：一种耦合离散的有限元方法，其具有基于GPU的并行算法的锥形夹克平台的冰诱导振动

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摘要

Flowing ice draws special attention due to the dynamic response of jacket platforms. In this study, a coupled discrete element method (DEM) and finite element method (FEM) are developed to analyze the interaction between sea ice and conical jacket platforms to determine the ice-induced vibrations (IIVs) of the structure. To model the ice cover and to investigate ice loads, a DEM with bond-breaking spherical elements is adopted. Meanwhile, the FEM (with a beam element) is applied to model the IIVs of the jacket platform. An efficient transmission scheme between the bond-breaking spherical elements and the beam element is proposed. The graphics processing unit-based parallel algorithm is developed to improve the computational efficiency. The simulated ice loads are verified by comparing them with the full-scale data and different ice load functions. The simulated IIV accelerations of the JZ20-2 MUQ conical platform in the Bohai Sea (China) are consistent with the full-scale data under various ice conditions (e.g., velocity and thickness). The numerical results show that the IIV acceleration increases linearly with the ice velocity and the square of the ice thickness.
机译：由于夹克平台的动态响应，流动的冰是特别的注意。在该研究中，开发了一种耦合的离散元件（DEM）和有限元方法（FEM）以分析海冰和锥形夹克平台之间的相互作用以确定结构的冰诱导的振动（IIV）。为了模拟冰盖并调查冰负荷，采用具有粘结球形元件的DEM。同时，将FEM（具有梁元件）应用于模拟夹克平台的IIV。提出了粘合球形元件和梁元件之间的有效传动方案。开发了基于图形处理单元的并行算法以提高计算效率。通过将模拟冰负载与全尺度数据和不同的冰负载功能进行比较来验证。渤海（中国）JZ20-2 MUQ锥形平台的模拟IIV加速度与各种冰条件下的全规模数据一致（例如，速度和厚度）一致。数值结果表明，IIV加速度随着冰速度和冰厚度的平方而线性增加。

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