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双峰海浪频谱的一种表示
管长龙1, 张大错1, 关世义2
1.青岛海洋大学物理海洋研究所 青岛 266003;2.航天工业总公司三院三部 北京 100074
摘要:
采用低频分谱和高频分谱叠加的思想，提出了双峰海浪频谱的一种表示。所用的分港形式为以便于确定的物理量为参数的Neumann型谱形。给出了由实测双峰港的特征量确定分谱参数的合理途径，解释了以往双峰诺表示中高频部分过高估计的原因并予以解决，最后应用于胶州湾和南海西沙海域的实测谱。
关键词:  海浪  双峰谱
DOI：
分类号:
基金项目:航天工业总公司资助项目
REPRESENTATION OF BIMODAL FREQUENCY SPECTRA OF SEA WAVES
Guan Changlong1, Zhang Dacuo1, Guan Shiyi2
1.Institute of Physical oceanogrophy, Ocean University of Qingdao, Qingdao 266003;2.The Third Research Academy, CASC, Beijing 100074
Abstract:
A representation of the bimodal frequency spectra of sea waves is presented, in which the bimodal spectra are expressed as summation of low and high frequency component spectra in Neumann form with readily determined parameters, including the zeroth moment of the spectra (See PDF), peak frequency ω0 and peakness factor P=ω0S(ω0)/m0. A procedure is given to reasonably determine these parameters on the basis of the measured spectral characteristics. The problem of overestimation at the high frequency band in the past work is explained and resolved. Application of the proposed formula to fit measured bimodal spectra obtained from Jiaozhou Bay in the Yellow Sea' and the Xisha area, in the South China Sea showed good agreement between computed and measured values.
Key words:  Sea wave, Bimodal spectra
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