Ice-Induced Vibration Analysis of Fixed-Bottom Wind Turbine Towers

Author:

Wang Bin12,Yin Haoyang3,Gao Shan12,Qu Yan3,Chuang Zhenju4ORCID

Affiliation:

1. Key Laboratory of Far-Shore Wind Power Technology of Zhejiang Province, Hangzhou 311122, China

2. PowerChina Huadong Engineering Corporation Limited, Hangzhou 311122, China

3. School of Marine Science and Engineering, International Campus, South China University of Technology, Guangzhou 511442, China

4. Naval Architecture and Ocean Engineering College, Dalian Maritime University, Dalian 116026, China

Abstract

This research tackles the challenge of ice-induced vibrations in fixed-bottom offshore wind turbines, particularly the risk of frequency lock-in (FLI), a critical loading condition arising from slow ice movement against structures. We introduce an innovative FLI analysis process grounded in the ductile damage–collapse (DDC) mechanism, which offers a more accurate and significantly lower probability of FLI occurrence than conventional methods. Through dynamic evaluations employing a time-domain ice load model and FLI displacement analyses, we demonstrate that FLI can lead to higher structural vibrations than those caused by continuous brittle ice crushing. A case study of a 5 MW monopile wind turbine tower utilising Abaqus confirms the necessity for incorporating FLI considerations into structural design to ensure safety and performance in ice-prone environments. Comparing the DDC mechanism with the ISO method, our study reveals that the DDC approach predicts higher displacement and acceleration values during FLI, nearly an order of magnitude greater than those induced by ice loads with a 50-year return period. The research underscores the importance of robust ice-load integration in design strategies for offshore wind turbines, especially in regions susceptible to ice. It highlights the DDC mechanism as a novel strategy for enhancing structural resilience against ice-induced hazards.

Funder

National Natural Science Foundation of China

Open Fund of Key Laboratory of Far-shore Wind Power Technology of Zhejiang Province

Zhejiang Provincial Natural Science Foundation of China

Publisher

MDPI AG

Reference21 articles.

1. Spring, W., Timco, G., Mironov, Y., and Shaw, C.J. (2024, July 04). ISO 19906 Annex B—Description and Use. Available online: https://trid.trb.org/view/1335449.

2. Peyton, H.R. (1966). Sea Ice Strength, University of Alaska Fairbanks.

3. Engelbrektson, A. (2024, July 04). An Ice-Structure Interaction Model Based on Observations in the Gulf of Bothnia; Vibration. Available online: https://trid.trb.org/View/437488.

4. Model test study of the nonsimultaneous failure of ice before wide conical structures;Huang;Cold Reg. Sci. Technol.,2010

5. Wang, B., Gao, S., Qu, Y., Yin, H., and Chuang, Z. (2023). Mechanism of Phase-Locked Ice Crushing against Offshore Structures. J. Mar. Sci. Eng., 11.

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