为研究波浪谱峰周期和有效波高联合分布,采用Weibull分布拟合谱峰周期和有效波高的边缘累积分布,根据周年实测逐时序列值估计参数Kendall τ,利用Gumbel-Hougaard Copula函数构建有效波高和谱峰周期联合分布函数,并与实测序列值统计结果进行对比分析。结果表明,Copula方法可较好拟合谱峰周期和有效波高的联合分布,且为连续函数分布,可为设计进行疲劳计算提供更加详实的数据,也为研究二者相互关系提供一种新的思路。
Abstract
In order to study joint distribution of peak period and effective wave height, Weibull distribution is used to fit edge cumulative distribution of peak period and effective wave height. Kendall τ, Gumbel-hougaard copula function are used to construct joint distribution function of peak period and effective wave height. Statistical results are compared with measured sequence values. Results show that Copula function method can better fit joint distribution of wave period and height, and it is a continuous function distribution, which provides a more detailed basis for design of fatigue calculation, and also provides a new way to study relationship between them.
关键词
海上风电 /
Weibull分布 /
最大似然法 /
Copula函数
Key words
offshore wind power /
Weibull distribution /
maximum likelihood /
Copula function
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