共查询到20条相似文献,搜索用时 255 毫秒
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本文用谱分析方法对方柱群墩结构在不规则波作用下的相互影响进行了计算。研究了在不同入射波向时每个方墩的群墩影响系数随墩距变化的规律并与折算圆墩的结果进行了比较。入射波谱采用Bretschneider谱。计算结果表明方柱墩群与折算圆柱墩群的群墩影响系数较为接近且随着墩间距的增加趋近于孤立墩情形。 相似文献
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根据华南沿海近31年热带风暴及台风的天气图,分析统计出该海区不同纬度处台风中心气压、台风移动速度的长期概率分布。从这些概率分布曲线可得到不同重现期的设计台风,再用Bretschneider1972年的半经验公式即可快速估算出不同纬度处的不同重现期的最大设计波浪及最大设计风速。该法效果良好,可供海洋工程可行性研究阶段参考使用。 相似文献
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Song Jinming 《海洋学报(英文版)》1997,16(4):557-562
Binogeochemical process of major elements in sining particulate of Nansha coral reef lagoons,South TXBinogeochemicalprocessofm... 相似文献
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CytochalasinBinducedtriploidyinPenaeuschinensis¥BaoZhenmin,ZhangQuanqi,WangHaiandDaiJixun(ReceivedApril5,1993;acceptedAugust1... 相似文献
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本文对文圣常教授等提出的改进的理论风浪频谱进行数值订正,使无因次谱下的总面积等于1,而且在(?)=1.15处谱的斜率的连续性较好。 相似文献
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风浪方向分布模式的比较 总被引:2,自引:0,他引:2
本文对目前常用的几种风浪方向分布模式进行了分析对比,进而根据由浪高仪阵列和ENDECO956测波浮标在我国各海区测得的风浪方向谱,从波能方向分布、方向累积分布、方向分布的峰值和标准差四个方面,与光易恒、Hasselmann和Donelan等分别由观测得到的经验方向分布以及文圣常等由解析方法得到的风浪方向谱进行了比较,结果表明:Donelan分布与实测结果比较一致,文圣常谱也较接近。此外,笔者在渤海由仪器阵列实测方向谱拟合得到的方向分布(改进的光易模式)与各地实测资料也比较符合。 相似文献
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Numerical simulation for dynamical processes of sea ice 总被引:1,自引:0,他引:1
NumericalsimulationfordynamicalprocessesofseaiceWuHuiding,BaiShan,ZhangZhanhaiandLiGuoqing(ReceivedMay16,1996;acceptedJanuary... 相似文献
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在深水海浪向近岸浅水区传播的过程中,由于变浅作用,海浪的频谱 相应的变化。章以华南沿岸实玫水台风风浪资料为基础,通过分析比较深水风浪频谱与实测台风风浪频谱的不同,并对实测资料进行统计处理,得出适用于华南沿岸浅水台风风浪的频谱。章针该频谱与已有的两种深 浪频谱和Basinski-Massel浅水风浪频谱进行了比较。 相似文献
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Instability analysis of three-dimensional ocean shear waves 总被引:1,自引:0,他引:1
Qiao Fangli 《海洋学报(英文版)》1996,15(1):1-8
Instabilityanalysisofthree-dimensionaloceanshearwaves¥QiaoFangli(ReceivedNovember6,1995,acceptedNovember30.1995)Abstract:Base... 相似文献
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It is well known that energy spectrum bandwidth should be able to reflect the degree of energyconcentration.However.the commonly used bandwidth factors defined by Longuet-Higgins could not fitthe concept satisfactorily.A new kind of spectrum bandwidth scale factor with a clear physical meaning isgiven in the present paper and a constant is obtained which reveals the intrinsic characteristics of seawaves.Thereby a universal relationship between significant wave height of sea waves and spectrumbandwidth is established. 相似文献
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Outer frequency spectrum of sea waves and its equilibrium range 总被引:3,自引:0,他引:3
Thepresentpaperdefinesthegeneralizedapparentenergydistributionandderivestheanalvticalformoftheso-calledgeneralizedouterfrequencyspectrumornthorderapparentfrequencyspectrum.Itisshownthatthegen-eralizedouterfrequencyspectrumhasanequilibriumrangewithanexponent(n+3)andtheupperlimitoftheex-ponentis-3.TheresultsofthispaperareuniversalandareapplicableforanyotherwavephenomenaiftheraytheoryofwavesandtheLonguet-Higgins,linearrandomwavemodelareexactenoughfortheirdescziption. 相似文献
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基于数值模拟的三维随机海面,从时间域和空间域两个角度对海浪的外观特征和内部结构间的关系进行了研究,得出了一些在工程应用上有参考价值的结果.文章认为,将波面看作是若干随机正弦波叠加的海浪结构模型,用于描述平稳、均匀和窄谱的海况时,其频谱分析结果与外观统计结果基本上是一致的;但是,当海面处于谱宽度较大的风浪或混合浪状态时,一些频谱分析结果必须经过修正才能应用.同一海况下,海面波动的时间过程和沿主波向的空间分布是明显不同的.当海面有突发性大浪时,外频谱能够很好地反映不平稳海况,而频谱则把这种不平稳性平滑了.文章着重讨论了波长和波陡的计算、频谱和外频谱的差异. 相似文献
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Based on the ray theory and Longuet-Higgins’s linear model of sea waves, the joint distribution of wave envelope and apparent wave number vector is established. From the joint distribution, we define a new concept, namely the outer wave number spectrum, to describe the outer characteristics of ocean waves. The analytical form of the outer wave number spectrum, the probability distributions of the apparent wave number vector and its components are then derived. The outer wave number spectrum is compared with the inner wave number spectrum for the average status of wind-wave development corresponding to a peakness factor P = 3. Discussions on the similarity and difference between the outer wave number spectrum and inner one are also presented in the paper. 相似文献
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利用实验室风浪槽内测得的波面序列资料估计风浪外频谱。通过与实测风浪内频谱的比较,研究实测风浪外频谱的谱形特征,探讨海浪外频谱与内频谱的相似性问题。此外,还检验一种理论海浪外频谱。 相似文献
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Koji Ueno 《Journal of Oceanography》1998,54(6):641-649
A state of wind waves at a fetch is assumed to be transformed into another state of wind waves at a different fetch by the
renormalization group transformation. The scaling laws for the covariance of water surface displacement and for the one-dimensional
and two-dimensional spectrum and the power law for the growth relation are derived from the fact that the renormalization
group transformation constitutes a semigroup. The scaling relation or the relation among the exponents of the power law is
also derived, using the two assumptions that the renormalization group transformation is applicable to fetch-limited wind
waves and that the saturated range exists, which implies that the directional distribution function of energy in the wave
number region much larger than the peak wave number does not depend on wave number. 相似文献