Vibration Mechanism and Noise Characterization of Offshore Wind Turbines

IF 1.7 4区物理与天体物理

Acoustics Australia Pub Date : 2023-10-19 DOI:10.1007/s40857-023-00308-6

Chunmei Yang, Run Li, Liangang Lü, Zongwei Liu, Ying Jiang, Zhe Xu

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Abstract

This study used accelerometers and hydrophones to measure the vibration and underwater noise from two different types of offshore wind turbine installed near the East China Sea Bridge (Shanghai). Wind speed and rotor speed were also monitored synchronously. The spectrograms of the vibration and underwater noise signals display well-defined spectral lines that are easily distinguishable. Line-component spectra of both vibration and underwater noise signals were synchronously extracted through filtering and correlation analysis. On this basis, relationships between the intensity and frequency of wind turbine vibration and underwater noise line-component spectra, rotor speed, and wind speed were analyzed. Results indicate that rotor speed is positively correlated with wind speed, and that the peak vibration frequencies and intensities of both types of turbine are positively correlated with rotor speed. Consequently, it can be concluded that the frequency and intensity of turbine-generated underwater noise are closely related to wind speed. Additionally, the vibration mechanism and the characterization of underwater noise of the wind turbines have been revealed.

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近海风力涡轮机的振动机理和噪声特性分析

本研究使用加速度计和水听器测量了安装在东海大桥（上海）附近的两种不同类型海上风力涡轮机的振动和水下噪声。同时还对风速和转子速度进行了同步监测。振动和水下噪声信号的频谱图显示了清晰的频谱线，易于区分。通过滤波和相关分析，同步提取了振动和水下噪声信号的线分量频谱。在此基础上，分析了风机振动和水下噪声线分量频谱的强度和频率与转子转速和风速之间的关系。结果表明，转子速度与风速呈正相关，两种类型风机的振动峰值频率和强度与转子速度呈正相关。因此，可以得出结论，涡轮机产生的水下噪声的频率和强度与风速密切相关。此外，还揭示了风力涡轮机的振动机理和水下噪声的特征。

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来源期刊

Acoustics Australia ACOUSTICS-

自引率

5.90%

发文量

期刊介绍： Acoustics Australia, the journal of the Australian Acoustical Society, has been publishing high quality research and technical papers in all areas of acoustics since commencement in 1972. The target audience for the journal includes both researchers and practitioners. It aims to publish papers and technical notes that are relevant to current acoustics and of interest to members of the Society. These include but are not limited to: Architectural and Building Acoustics, Environmental Noise, Underwater Acoustics, Engineering Noise and Vibration Control, Occupational Noise Management, Hearing, Musical Acoustics.