基于模态参数的风电塔架结构局部变形损伤识别分析

IF 4.3 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2025-06-14 DOI:10.1016/j.istruc.2025.109421

Xinwei Huang , Yibing Liu , Jiantao Liu , Shiming Wu , Jinsheng Ren , Kaili Zhang , Chao Zhou

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引用次数: 0

摘要

风力发电塔架的规模化发展，增加了塔架局部损伤变形的易感性，严重影响塔架运行的安全性和稳定性。以DTU 10 MW风力发电机组塔架为研究对象，提出了一种基于有限元动力学分析和模态参数的损伤识别方法。该方法通过有限元建模和截面刚度公式计算弯曲刚度值，研究模态柔度差曲率（MFDC）用于结构损伤识别的准确性，探讨圆度偏差和局部凹痕深度对结构完整性的影响。此外，还研究了多截面损伤对模态识别的影响。结果表明，在圆度偏差和局部凹痕作用下，损伤截面的抗弯刚度出现振荡。MFDC方法利用损伤前/损伤后模态参数准确识别损伤局部位置，量化损伤严重程度阈值，具有鲁棒的多段损伤定位精度。

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Damage identification analysis of local deformation in wind turbine tower structures based on modal parameters

The large-scale development of wind turbine towers has increased susceptibility to local damage deformation, significantly impacting operational safety and stability. Focusing on the DTU 10 MW wind turbine tower, this study proposes a damage identification method based on finite element dynamic analysis and modal parameters. The approach calculates flexural rigidity values through finite element modeling and sectional stiffness formulas, investigates the accuracy of modal flexibility difference curvature (MFDC) for structural damage identification, and explores the effects of roundness deviations and local dent depths on structural integrity. Additionally, the influence of multi-section damage on modal identification is examined. Results reveal flexural rigidity oscillations at damaged sections under roundness deviation and local dents. The MFDC method accurately identifies localized damage positions using pre/post-damage modal parameters, quantifies damage severity thresholds, and demonstrates robust multi-section damage localization accuracy.

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来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.