深水风浪的平均波长与平均周期的关系
Relationships between mean wavelength and mean wave-period of wind wave in deep water
-
摘要: 在Gaussian波场基础上,推导出以P-M谱和平均JONSWAP谱代表的充分成长和有限风区的深水风浪平均波长与平均波周期之间的关系为.推导中运用了Rice跨零点问题的解并通过滑动时间平均技术估计4阶谱矩.在风浪水槽进行了实验,实验结果与有限风区下推导出的关系相比较,符合较好.Abstract: Relationships between the mean wavelength and mean wave-period of wind waves are derived for fetch-limited and ful-ly developed sea states represented by mean JONSWAP spectrum and P-M spectrum,respectively,and found to be ,The derivations start from the Rice solution of zero-crossirtt; problem and the spectral moment of 4-orders involved in the derivations are estimated through a time-averaging technique,Experiments have been conducted }n a wind-wave channel,The experimented results are compared with the derived relationship,showing a favorable agreement.
-
Key words:
- Spectral moment of 4-orders /
- time-averaging technique /
- Hilbert transform
-
Kinsman B.Wind Waves.Prentice-Hall,Inc.Englewood Cliffs,New Jersey,1965,40-45 Ochi M K,Tsai C H.Prediction of occurrence of breaking waves in deep water.J.Physical Oceanograph,1983,13,2 008-2 019 Li Y C,Dong G H.Wave breaking phenomena of irregular waves rnmbined with opposing current.China Ocean Engineering,1993,7(3):197-206 Papoulis A P.Probability,Random,Variables,and Stochastic Processes.McGraw-Hill,1965,487-492 Glazman R E.Statistical characterization of sea surface geometry for a wave slope field discontinuous in the mean.J.Geophys.Res.,1986.91(5):6 629-6 641 Glazman R E.Mathematical modeling of breaking wave statistics.In:The Ocean Surfcae:Wave Breaking,Turbulent Mixing and Radio Probing,Toba Y and Misuyasu H eds.D.Reidel,Hingham,Mass.,1985,145-150 Melville W K.Wave modulation and breakdown.J.Fluid Mech.,1983,128,489-506 吕红民,许金山.大型风浪水槽风浪统计特征的测量和分析.青岛海洋大学学报,1996,26(4):431-438 Lii Hongmin,Xu Delun.Spectral characteristics of wind-waves in laboratory.China Ocean Engineering,1998,12(2):183-190 -
计量
- 文章访问数: 926
- HTML全文浏览量: 22
- PDF下载量: 1409
- 被引次数: 0
下载:
