标题： 使用频率相关系数的莫里森方程对海上风力涡轮机的增强水动力模型 显示英文标题

标题： Enhanced Hydrodynamic Modeling of Offshore Wind Turbines using Morison's Equation with Frequency-Dependent Coefficients

摘要： 本文提出了一种在莫里森方程中实现频率相关水动力系数的新方法，该方程在水动力学建模中被广泛使用。 使用莫里森方程进行准确的水动力预测需要考虑频率相关的阻力系数，因为它们随波浪频率而变化。 为了解决这个问题，所提出的方法将频率域划分为不同的区域，如低频（共振）区域和高频（波浪）区域。 而不是在整个频谱上使用恒定的阻力系数，这些区域被分配了不同的阻力系数。 为了实现这一点，对共振区域应用了五阶低通巴特沃斯速度滤波器，而对波浪主导区域应用了一阶高通巴特沃斯速度滤波器。 该方法使用INO WINDMOOR 12MW半潜式海上风力涡轮机进行验证，将仿真结果与实验数据进行比较。 通过引入频率相关的阻力系数，模型在两个频率区域内的实验纵荡运动数据上表现出更好的一致性，证明了所提出方法的有效性。 显示英文摘要

摘要： This paper presents a novel approach for implementing frequency-dependent hydrodynamic coefficients in Morison's equation, which is widely used in hydrodynamics modeling. Accurate hydrodynamic predictions using Morison's equation necessitate the incorporation of frequency-dependent drag coefficients due to their variation with wave frequency. To address this, the proposed method segments the frequency domain into different regions, such as low-frequency (resonance) and high-frequency (wave) regions. Instead of using a constant drag coefficient across the entire spectrum, different drag coefficients are assigned to these regions. To implement this, a fifth-order low-pass Butterworth velocity filter is applied for the resonance zone, while a first-order high-pass Butterworth velocity filter is applied for the wave-dominated zone. The approach is validated using the INO WINDMOOR 12MW semisubmersible offshore wind turbine, comparing the simulation results against the experimental data. By incorporating frequency-dependent drag coefficients, the model shows improved agreement with experimental surge motion data across both frequency regions, demonstrating the effectiveness of the proposed method.