极端海况meta-ocean轮廓线的双变量核密度估计

Bivariate Kernel Density Estimation for Meta-ocean Contour Lines of Extreme Sea States

本文基于在两个离岸地点所测得的海洋波浪数据提出了一个新颖的环境轮廓线(meta-ocean轮廓线)法。为了实现这一新颖的环境轮廓线法,提出采用带偏向交叉验证带宽选择的双变量核密度估计。用新颖方法所得到的环境轮廓线与用克莱顿连接转换法所得到的环境轮廓线来做对比,清晰地验证了所提出的新颖方法的有效性和优越性。研究结果证明了所提出的新颖方法可被用作预报海洋工程结构物长期极端动力响应的有效工具。

A novel environmental contour lines(meta-ocean contour lines) method was proposed basedon measured ocean wave data at two offshore sites. The use of bivariate kernel density estimation withbiased cross-validation bandwidth selection was proposed for implementing the novel environmentalcontour lines method. Comparison of the environmental contours obtained by using the proposed novelmethod with those obtained by using the Clayton copula transformation method clearly substantiatedthe effectiveness and superiority of the proposed novel method. The research results demonstrate thatthe proposed novel method can be utilized as an effective tool for predicting the long-term extreme dy-namic responses of ocean engineering structures.