摘要
为了研究特定海域范围内海浪的内部能量相对于频率的分布规律,本文以目标岛屿处"波浪骑士"式浮标提供的实际观测资料为依据,提出了一种基于实测资料的风浪数据筛选和理论风浪谱修正方法。通过讨论实测频谱与理论频谱的谱峰位置关系筛选出研究针对的风浪数据点,将实测风浪频谱与理论频谱进行对比分析,进而提出理论风浪谱的修正方法,并以增加参数的JONSWAP谱为靶谱对实测风浪数据进行拟合,得到了可以表达目标岛屿处风浪内部能量的理论谱形式,并进行了对比验证。研究结果表明:所提出的理论风浪谱修正方法,能够有效地筛选出实测数据集中的风浪数据,并完成对特定海域处风浪频谱的描述表达。
To express the distribution law of the internal energy of sea waves in a specific sea area relative to their frequency,a method for screening wind wave data and modifying theoretical wind wave spectrum was developed based on the data measured from a Waverider buoy placed near the target island. The relationship between the measured and theoretical frequency spectra was discussed,and wind wave data points were screened out. Comparative analysis of the measured and theoretical frequency spectra of wind waves was performed,and a method for modifying the theoretical wind wave spectrum was further proposed. The measured wind wave data were fitted by taking the JONSWAP spectrum with increasing parameters as the target spectrum and the form of the theoretical spectrum expressing the energy within the wind wave at the target island was obtained. A comparative demonstration was also carried out. The research results showed that the proposed method can effectively screen the wind wave data within the actual measured dataset and derive a descriptive expression of the wind wave frequency spectrum in a specific sea zone.
引文
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