畸形波幅频调制特性的实验研究  

EXPERIMENTAL STUDY ON AMPLITUDE FREQUENCY MODULATION CHARACTERISTICS OF ROGUE WAVES

作　　者：黄勇 何倩倩 章丽骏 HUANG Yong;HE Qianqian;ZHANG Lijun(Shanghai Energy Technology Development Co.,Ltd,Shanghai 200233,China;School of Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海能源科技发展有限公司,上海200233 [2]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《力学与实践》2025年第2期342-346,共5页Mechanics in Engineering

基　　金：国家电力投资集团有限公司统筹研发经费支持项目(KYTC2021FD01)资助。

摘　　要：在漂浮式风力机水池缩尺模型实验中,生成畸形波以模拟其在实际海况下的性能响应十分重要,而畸形波的生成机制以及产生概率一直是研究的热点问题。为此,本文通过在海洋工程实验水池中进行物理实验,以此来探究波浪的演化过程以及畸形波的产生概率。实验采用随机波幅和随机相位法生成初始波序,对实验结果进行统计学分析,并对波浪能谱进行研究。实验结果表明,波浪谱的谱峰值下移以及谱峰频率逐渐减小。波浪的波高分布不再服从Rayleigh分布,具有大Benjamin-Feir指数的波浪场更容易出现极限波高或畸形波。Generating rogue waves in offshore tank during the scaled model tests of an offshore wind turbine is crucial,and the mechanisms and probabilities of rogue wave generation have always been a hot issue in the research.Therefore,through the experiment in the ocean engineering experimental tank,the experiment uses the random amplitude and random phase method to generate the initial wave sequence,and conducts a statistical analysis of the experimental results.The wave energy spectrum is studied to explore the evolution of waves and assess the probability of rogue waves.The results show that in the wave propagation,the spectral peak moves down and the frequency of the spectral peak decreases gradually.Additionally,the wave height distribution of waves does not obey the Rayleigh distribution,and the wave field with large Benjamin-Feir index(BFI)is more prone to limit wave height or rogue wave.

关 键 词：非线性波 波浪调制演化 畸形波 Benjamin-Feir 指数 

分 类 号：P731.22[天文地球—海洋科学]