实测风浪频谱的易变性
-
摘要: 本文应用一种具有局域保真性的组成波分解方法(子波变换),对实测风浪波面进行分析.结果表明:风浪不同组成波的相位之间,彼此的耦合远强于各自随机特征,组成波的相位不是相互独立的随机变量;风浪平衡域内的高频组成波表现为不规则的间歇性波动,而不是平面波;通过一个简化动力学模式证明,造成上述间歇性的成因是无时不存在的低频海水运动;由此得到结论,实测风浪频谱具有易变性.
-
Phillips O M.The equilibrium range in the spectrum of wind-generated ocean waves.J Fliud Mech.,1958,4,426-434 Toba Y.Local balance in the air-sea boundary processes-Ⅲ,On the spectrum of wind waves.J.Oceanogr.Soc.Japan,1973,29,209-220 Philips O M.Spectral and statistical properties of the equillbrium range in wind-generated gravity waves.J.Fluid Mech.,1985,156,505-531 Mitsliyasu H.Observation of the power spectrum of ocean waves using a cloverleaf buoy.J.Phys.Oceanogr.,1980,10,286-296 Battjes J A.A reanalysis of the spectra observed in JONSW AP.J.Phys.Oceanogr.,1987,17.1288-1295 Wen S C et al.The equilibrium range of wind wave frequency spectrum.Acta Oceanologica Sinica,1990,11(1):1-12 Flandrin P.Reprz Sentations Temps-Frequence des Signaux Non-Stationnaires.Thése Doct.Etat.INP G.Grenoble,1987 Longuet-Higgins M S.The statistical analysis of a random moving surface.Phil.Trans.Roy.SOC.,1957,A 249(96G):321-387 Toba Y.T he response of wind-wave spectra to changing winds.J.Phys.Oceanogr.,1988,18,1231-1290 Ebuchi N,H Kawamura and Y Toba,On the wave dependence of sea-surfa ce wind stress.J.Oceanogr.Soc.Japan.,1990,46,177-183 Toba Y and N Ebuchi.Multiple regimes in wave dependent wind stress,especially on fluctuating roughness length in concert with wind and waves.J.Oceanogr.Soc.Japan,1991,57,705-721 Philips O M.On the dynamics of unsteady gravity waves of finite amplitude,Part I,J.Fluid Mech.,1960,9,193-217 Longuet-Higgins M S.On the nonlinear transfer of energy in the peak of a gravity-wave spectrum:a simplfied model.Proc.Roy.Soc.A,1978,347,311-328 Lighthill J.Waves in Fluid,Cambridge University Press,London,1978 Landau L D and E M Lifshitz,Mechanics,Pergamon,Oxford,1970 Zaslavsky G M.Chaos in Dynamic System,Harwood Academic Publishers,N Y,1985
点击查看大图
计量
- 文章访问数: 741
- HTML全文浏览量: 6
- PDF下载量: 573
- 被引次数: 0