OC6 Phase Ib: Validation of the CFD predictions of difference-frequency wave excitation on a FOWT semisubmersible
OC6 Phase Ib: Validation of the CFD predictions of difference-frequency wave excitation on a FOWT semisubmersible
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OC6 阶段 Ib：验证 FOWT 半潜式平台差频波激励的 CFD 预测
DOI：
10.1016/j.oceaneng.2021.110026
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发表时间：
2021
影响因子：
5
通讯作者：
Wang L
中科院分区：
文献类型：
--
作者：
Wang L
在之前的oc511项目中，研究人员发现，用于浮式风系统的最先进的中保真度工程工具始终低估了半潜式海上风平台的非线性低频响应，导致低频浪振和音高共振导致结构载荷出现重大误差。为了检验这种低估，我们进行了计算流体动力学（CFD）模拟和模型盆地实验的协调研究。这两项研究都涉及固定和简化的OC5-DeepCwind半潜式双色波。将CFD模拟得到的结构上的波动激励，特别是非线性的差频激励，与实验测量结果进行了对比验证，并对实验结果和CFD结果进行了不确定性分析。此外，实验中还分别测量了半潜器每根柱上的波浪激励，从而可以在每根柱的基础上验证CFD结果。总体而言，CFD对差频激励的预测与实验测量结果一致，表明CFD解决方案可作为调整和改进工程级工具的参考，并为更好地理解低频欠预测提供了一种手段。
During the previous OC511project, state-of-the-art mid-fidelity engineering tools for floating wind systems were found to consistently underpredict the nonlinear, low-frequency responses of semisubmersible offshore wind platforms, leading to substantial errors in the structural loads because of low-frequency surge and pitch resonance. To examine this underprediction, a coordinated investigation with computational fluid dynamics (CFD) simulations and model-basin experiments was carried out. Both investigations involved a fixed and simplified OC5-DeepCwind semisubmersible in bichromatic waves. The wave excitations—especially the nonlinear, difference-frequency excitation—on the structure from the CFD simulations were compared to the experimental measurements for validation, with uncertainty analyses for both the experimental and the CFD results. Further, the wave excitations on each column of the semisubmersible were measured separately in the experiment, allowing the validation of the CFD results to be done on a per-column basis. Overall, the CFD predictions of the difference-frequency excitations agree with the experimental measurements, suggesting the CFD solutions can be used as a reference for tuning and improving the engineering-level tools and can provide a means to better understand the underprediction at low frequencies.
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DOI：
10.1177/1475090217726884
发表时间：
2018-02
期刊：
Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment
影响因子：
--
作者：
Weizhi Wang;Minghao Wu;Johannes Palm;C. Eskilsson
通讯作者：
Weizhi Wang;Minghao Wu;Johannes Palm;C. Eskilsson
非定常流模拟中的数值误差
影响因子：
0.6
作者：
L. Eça;G. Vaz;S. Toxopeus;M. Hoekstra
通讯作者：
M. Hoekstra
DOI：
10.1063/1.168744
发表时间：
1998-11-01
期刊：
COMPUTERS IN PHYSICS
影响因子：
--
作者：
Weller, HG;Tabor, G;Fureby, C
通讯作者：
Fureby, C
测量的不确定性：通过函数关系计算不确定性分量的规则的回顾。
影响因子：
--
作者：
I. Farrance;R. Frenkel
通讯作者：
R. Frenkel
半潜式 FOWT 平台非线性差频波浪载荷 CFD 研究的不确定度评估
影响因子：
3.9
作者：
Lu Wang;A. Robertson;J. Jonkman;Yi
通讯作者：
Yi