On the Uncertainties of Estimating JONSWAP Spectrum Peak Parameters
On the Uncertainties of Estimating JONSWAP Spectrum Peak Parameters
复制标题
关于JONSWAP谱峰参数估计的不确定性
DOI：
10.1115/omae2018-78386
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
J. McConochie
中科院分区：
文献类型：
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作者：
K. Ewans;J. McConochie
在海洋结构物的设计中，通常需要对波浪谱进行谱描述，并且通常使用JONSWAP谱的一般形式。JONSWAP频谱涉及允许频谱峰值规格灵活性的参数，这对于固定和浮动结构的响应都很重要，但对于浮动结构尤其重要。波浪谱的峰值在非线性效应中也很重要，例如，在用于测试设计平台的模型盆地中，非线性效应有助于在海况时间序列实现中出现大波峰的概率。
已经有一些研究集中在JONSWAP参数估计的不确定性。我们回顾这些建立一个概述目前的不确定性的理解，我们进行进一步的分析，以调查的敏感性的不确定性的分析方法和类型的数据通常可用于分析，包括时间序列和光谱数据。
A spectral description of the wave spectrum is usually required in the design of offshore structures, and a generalised form of the JONSWAP spectrum is often used. The JONSWAP spectrum involves parameters that allow flexibility in the specification of the spectral peak, which is important for the response of both fixed and floating structures, but particularly for the floating structures. The peak of the wave spectrum is also important in nonlinear effects that for example contribute to the probability of a large crest occurring in a sea state time series realisation in a model basin, used to test a design platform.
There has been a number of studies focused on the uncertainties of JONSWAP parameter estimates. We review these to establish an overview of the present understanding of the uncertainties, and we undertake further analyses to investigate the sensitivity of the uncertainties to the method of analysis and the types of data typically available for analysis, including both time series and spectral data.