Estimating the parameters of ocean wave spectra
Estimating the parameters of ocean wave spectra
复制标题
估计海浪谱的参数
DOI:
10.1016/j.oceaneng.2021.108934
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发表时间:
2021
影响因子:
5
通讯作者:
Grainger J
中科院分区:
文献类型:
--
作者:
Grainger J
Wind-generated waves are often treated as stochastic processes. There is particular interest in their spectral density functions, which are often expressed in some parametric form. Such spectral density functions are used as inputs when modelling structural response or other engineering concerns. Therefore, accurate and precise recovery of the parameters of such a form, from observed wave records, is important. Current techniques are known to struggle with recovering certain parameters, especially the peak enhancement factor and spectral tail decay. We introduce an approach from the statistical literature, known as the de-biased Whittle likelihood, and address some practical concerns regarding its implementation in the context of wind-generated waves. We demonstrate, through numerical simulation, that the de-biased Whittle likelihood outperforms current techniques, such as least squares fitting, both in terms of accuracy and precision of the recovered parameters. We also provide a method for estimating the uncertainty of parameter estimates. We perform an example analysis on a data-set recorded off the coast of New Zealand, to illustrate some of the extra practical concerns that arise when estimating the parameters of spectra from observed data.
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DOI:
10.1115/omae2018-78386
发表时间:
2018
期刊:
Volume 3: Structures, Safety, and Reliability
影响因子:
--
作者:
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通讯作者:
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DOI:
--
发表时间:
1983
期刊:
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--
作者:
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通讯作者:
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DOI:
--
发表时间:
2010
期刊:
--
影响因子:
--
作者:
A. Babanin
通讯作者:
A. Babanin
DOI:
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发表时间:
1984
期刊:
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--
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通讯作者:
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影响因子:
2.7
作者:
A. Sykulski;S. Olhede;Arthur Guillaumin;J. Lilly;J. Early
通讯作者:
A. Sykulski;S. Olhede;Arthur Guillaumin;J. Lilly;J. Early