Nonlinear dynamic analysis of a wind turbine system considering base motion based on aero-elastic modeling

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-09-16 DOI:10.1016/j.tws.2025.113985

Bowen Jiang , Junshi Jia , Tao Yang , Zhichao Nie

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引用次数: 0

Abstract

This study reports nonlinear dynamics of wind turbine systems (WTS) subjected to base excitation. The investigation is based on an aero-elastic continuum model derived through the extended Hamilton's principle, explicitly incorporating geometric nonlinearities and blade-tower interaction effects. Model validation is achieved through via comparison with both published results and numerical simulations obtained from open source software. The spectrums of modal force and steady state amplitude curves are compared and discussed. Comparison of modal force spectrums shows that dominant frequencies of blade excitation demonstrate pronounced directional dependence while those of the tower excitation exhibits complete directional invariance. Steady state amplitude-frequency curves show that the blade responses exhibit hardening behavior and internal resonance, resulting from geometrically nonlinear effects excited by the base motion. Compared to single-blade models, amplitude-frequency curves derived from the integrated model exhibit additional peaks, indicating the effects of blade-tower interaction. Besides, unfavorable excitation directions for flap-wise blade and tower modes demonstrate negligible sensitivity to base motion amplitude while that for edge-wise blade modal response varies with base motion amplitude.

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基于气动弹性建模的考虑基座运动的风力发电系统非线性动力学分析

本研究报告了受基础激励的风力发电机组系统的非线性动力学。该研究基于扩展汉密尔顿原理推导的气动弹性连续体模型，明确地将几何非线性和叶片-塔相互作用效应纳入其中。通过与已发表的结果和开源软件的数值模拟进行比较，实现了模型的验证。对模态力谱和稳态振幅曲线进行了比较和讨论。模态力谱比较表明，叶片激励的主导频率表现出明显的方向依赖性，而塔激励的主导频率表现出完全的方向不变性。稳态幅频曲线表明，叶片响应表现出硬化行为和内部共振，这是由基底运动激发的几何非线性效应引起的。与单叶片模型相比，综合模型的幅频曲线出现了额外的峰值，表明了叶片-塔相互作用的影响。此外，叶片向扑翼和塔台模态的不利激励方向对基振幅的敏感性可以忽略不计，而叶片向边模态响应则随基振幅的变化而变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.