Inverse modeling of damping and soil-structure interface for monopiled offshore wind turbines
Inverse modeling of damping and soil-structure interface for monopiled offshore wind turbines
复制标题
单桩海上风力发电机阻尼和土壤-结构界面的反演建模
DOI：
10.1016/j.oceaneng.2020.108079
复制
发表时间：
2020
影响因子：
5
通讯作者：
Hua-Jun Li
中科院分区：
文献类型：
--
作者：
Shuai Cong;Sau-Lon James Hu;Hua-Jun Li
有许多文章致力于单桩海上风力发电机 (OWT) 系统动态分析的有限元建模。然而，有限元模型中使用的参数值的准确性一直是一个主要问题。从数学上讲，基于有限元模型的设计和分析被归类为“正向”问题，而基于测量的响应数据校正基线有限元模型的参数值则属于“逆向”问题。本文是第一篇致力于根据实测响应数据同时修正单桩 OWT 的土壤-结构界面和阻尼参数值的文章。本研究采用集总参数模型（LPM）（由一个旋转弹簧、一个水平弹簧和一个旋转缓冲器组成）用于土壤-结构界面，并采用瑞利阻尼模型用于塔/下部结构的能量损失，本研究开发了一种新颖的方法，仅基于少量测量的自然力来同时更新瑞利阻尼系数和土壤-结构界面刚度/阻尼参数。 频率和阻尼比。在数值研究中，使用国家可再生能源实验室 5-MW (NREL 5-MW) 参考涡轮机进行计算机模拟，以证明该方法的有效性。
There have been many articles contributed to the finite element modeling for the dynamic analysis of monopile offshore wind turbine (OWT) systems. However, the accuracy of the parameter values used in the finite element model has always been a major concern. Mathematically, the design and analysis based on a finite element model is classified as a "forward" problem, while correcting the parameter values of the baseline finite element model based on measured response data is an "inverse" problem. This paper is the first article devoted to the concurrent correction of parameter values of both soil-structure interface and damping of a monpile OWT based on measured response data. While adopting a lumped parameter model (LPM) - which consists of one rotational spring, one horizontal spring and one rotational dashpot - for the soil-structure interface and a Rayleigh damping model for the energy-loss of the tower/substructure, this study develops a novel method for simultaneously updating the Rayleigh damping coefficients and soil-structure interface stiffness/damping parameters based on only a few measured natural frequencies and damping ratios. In the numerical studies, computer simulations with the National Renewable Energy Laboratory 5-MW (NREL 5-MW) reference turbine are carried out to demonstrate the effectiveness of the proposed method.