A robust methodology for displaying two-dimensional environmental contours at two offshore sites

• Published in: Journal of marine science and technology Vol. 25; no. 4; pp. 1063 - 1074
• Main Author: Wang, Yingguang
• Format: Journal Article
• Language: English
• Published: Tokyo Springer Japan 01.12.2020; Springer; Springer Nature B.V
• Subjects: Automotive Engineering; Bivariate analysis; Comparative analysis; Contours; Engineering; Engineering Design; Engineering Fluid Dynamics; Hypothesis testing; Mechanical Engineering; Methodology; Methods; Ocean engineering; Ocean waves; Offshore Engineering; Original Article; Robustness; Shape; Water waves; Wave data; Smoothed cross-validation bandwidth selection; Environmental contours; Bivariate kernel density estimation; Gumbel copula transformation
• ISSN: 0948-4280; 1437-8213
• DOI: 10.1007/s00773-019-00700-w

This paper proposes a robust methodology for displaying two-dimensional environmental contour lines based on measured ocean wave data at two offshore sites. For implementing the robust environmental contour lines methodology, we propose the use of bivariate kernel density estimation with smoothed cross-validation bandwidth selection. The environmental contours obtained by using the proposed robust methodology have been compared with those obtained by using the Gumbel copula transformation method and another recently published method, and the effectiveness and superiority of our proposed robust methodology have been clearly substantiated. The research results in this paper demonstrate that our proposed robust methodology can be utilized as an effective tool for predicting the long-term extreme dynamic responses of ocean engineering structures.