Abstract: The interaction between waves and offshore structures is one of the central issues in marine engineering. Traditional physical model tests are limited by cost and scale effects; therefore, the development of high-precision numerical methods is crucial for elucidating the mechanisms of fluid-structure interaction. In this study, a three-dimensional numerical wave tank was constructed based on the moving particle semi-implicit (MPS) method, combined with graphics processing unit (GPU) parallel acceleration technology, enabling high-fidelity simulation of nonlinear regular waves. Through tests of damping and wave-attenuation layer parameters, the optimal damping coefficient was determined, effectively suppressing end reflections. Numerical results indicate that the tank can stably generate preset waves with good convergence; for dimensionless wave numbers less than 2, the deviation of the average wave height from the theoretical value is less than 4%, though model performance declines beyond this range. Further simulations of the floating structure's motion response showed that the time-history curves of the caisson's motion agreed well with experimental data, verifying the model's feasibility for wave-structure interaction problems. This study provides a reliable numerical method and theoretical reference for predicting the motion of floating structures under complex wave conditions.

Key words: moving particle semi-implicit method, numerical wave tank, generation of regular waves, floating body motion response

摘要： 波浪与海洋结构物相互作用是海洋工程研究的核心问题之一。传统物理模型试验受制于成本和尺度效应,故发展高精度数值方法对揭示流固耦合机理至关重要。该研究基于移动粒子半隐式方法,结合图形处理器（graphics processing unit,GPU）并行加速技术,构建了三维数值波浪水池,实现了非线性规则波的精细化模拟。通过阻尼消波层参数测试,确定了最优阻尼参数,有效抑制了末端反射。数值结果表明,该水池可稳定生成预设波浪,收敛性良好。当无量纲波数小于2时,平均波高与理论值的偏差小于4%;超过该范围时,模型性能显著下降。进一步开展的浮体运动响应模拟显示,浮箱运动历时曲线与试验数据吻合良好,验证了模型在波浪-结构物耦合问题中的可行性。该研究为复杂波况下浮式结构物的运动预测提供了可靠的数值方法与理论参考。

关键词: 移动粒子半隐式方法, 数值波浪水池, 规则波生成, 浮体运动响应