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Importance of platform mounting orientation of Y-shaped semi-submersible floating wind turbines: A case study by using surrogate models

机译：y形半潜式浮风机平台安装方向的重要性：使用代理模型的案例研究

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摘要

The Y-shaped semi-submersible platform, which is generally composed of three outer columns and one center column that are connected by a Y-shaped pontoon, is the one of the popular foundation concepts for floating wind turbines (FWTs). Because of its non-fully-symmetrical configuration, the directionality effects of ocean climate play a significant role in the dynamic response of the floating system, which indicates that the platform mounting orientation (PMO) should be comprehensively considered before installation at sea. This paper aims at evaluating the importance of PMO from the perspective of lifetime dynamic performance. However, simulating all the short-term conditions from a 25-year met-ocean database is computationally unaffordable. So, limited representative load cases are selected by maximum dissimilarity algorithm and reproduced in FAST, a coupled nonlinear aero-hydro-servo-elastic simulator for FWTs. After calibrating and validating four surrogate models based on 1-year fully simulated results, the Kriging model are adopted to construct lifetime responses. Finally, statistics of five indexes reflect the system performance show that the floating system behaves variously between four PMOs due to the distinct hydrodynamic properties. These findings demonstrate the importance of PMO and provide a guidance for the installation of Y-shaped semisubmersible floating wind turbines. (C) 2020 Elsevier Ltd. All rights reserved.
机译：Y形半潜式平台通常由三个外柱和一个由Y形浮筒连接的中心柱组成，是浮风机（FWT）的流行基础概念之一。由于其非完全对称配置，海洋气候的方向效应在浮动系统的动态响应中发挥着重要作用，这表明在海上安装之前应该全面地考虑平台安装方向（PMO）。本文旨在根据寿命动态性能的角度来评估PMO的重要性。但是，模拟了25年25年的海洋数据库的所有短期条件都是计算不适合的。因此，有限的代表性负载案例由最大不相似算法选择，并以快速的耦合非线性航空 - 水 - 水 - 伺服弹性模拟器用于FWT。基于1年全面模拟结果校准和验证四种代理模型后，采用Kriging模型构建寿命响应。最后，五个指标的统计数据反映了系统性能，表明浮动系统由于不同的流体动力学特性而在四个PMO之间行为。这些发现表明了PMO的重要性，并为安装Y形半浮风机的安装提供了指导。 （c）2020 elestvier有限公司保留所有权利。

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