ANALYSIS OF NATURAL WAVES BY LOCAL APPROXIMATIONS
ANALYSIS OF NATURAL WAVES BY LOCAL APPROXIMATIONS
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通过局部近似分析自然波
DOI：
10.1061/(asce)0733-950x(1989)115:3(384
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
P. Nielsen
中科院分区：
文献类型：
--
作者：
P. Nielsen
推荐局部近似作为分析天然水波的工具。所描述的局部近似的特定类别是基于正弦曲线的局部拟合，这自然导致局部定义的频率的定义。作为一个具体的应用，两种方法概述了估计表面高程的大（非线性）波从地下压力。其中一种方法非常简单，可以浓缩成一个公式，用三个压力读数来表示表面高程。其精度优于传统的光谱传递法。准则的使用方法与真实的（嘈杂）的数据。
Local approximations are recommended as a tool for the analysis of natural water waves. The particular class of local approximations described is based on local fitting of a sine curve, which leads naturally to the definition of locally defined frequencies. As a specific application, two methods are outlined for estimating surface elevations of large (nonlinear) waves from subsurface pressures. One of the methods is simple enough to be condensed into a single formula that expresses the surface elevation in terms of three pressure readings. Yet, its accuracy is better than that of the traditional spectral transfer method. Guidelines are presented for the use of the methods in connection with real (noisy) data.