Yang Chun-Mei, Liu Zong-Wei, Lü Lian-Gang, Yang Guang-Bing, Huang Long-Fei, Jiang Ying
Key Laboratory of Marine Science and Numerical Modeling, The First Institute of Oceanography, State Oceanic Administration, , Qingdao, 266061, China
J Acoust Soc Am. 2018 Dec;144(6):EL522. doi: 10.1121/1.5082983.
Underwater operational turbine noise emitted by China's first offshore wind farm in the East China Sea Bridge of Shanghai was measured and analyzed in this study. Two sensors were used in the measurement: a hydrophone recording the underwater sound and an accelerometer placed in the turbine tower detecting the tower vibrations. Measurements were performed at two different types of wind turbines: a Sinovel 3 MW SL3000 turbine and a Shanghai Electric 3.6 MW W3600 turbine. The two turbines show similar tower vibration characteristics, characterized by a number of tonal components, mainly in the low-frequency domain (30-500 Hz). The peak vibration frequencies changed with the wind speed until the turbine approached its nominal power rating. Spectral analysis of the underwater acoustic data showed that the amplitude spectra had a strong correlation with the spectra of the turbine vibration intensity level, indicating that the measured underwater noise was generated by the tower mechanical vibration.
本研究对中国首个海上风电场——上海东海大桥海上风电场运行时水下涡轮机发出的噪声进行了测量与分析。测量中使用了两个传感器：一个水听器用于记录水下声音，一个加速度计放置在涡轮机塔筒中以检测塔筒振动。测量在两种不同型号的风力涡轮机上进行：一台华锐3兆瓦SL3000型涡轮机和一台上海电气3.6兆瓦W3600型涡轮机。这两种涡轮机表现出相似的塔筒振动特性，其特征是有多个音调成分，主要集中在低频域（30 - 500赫兹）。峰值振动频率随风速变化，直至涡轮机接近其额定功率。对水下声学数据的频谱分析表明，幅度谱与涡轮机振动强度级的频谱有很强的相关性，这表明所测量的水下噪声是由塔筒机械振动产生的。
