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Effects of the asymmetric riser and bilge keel arrangements on FPSO green water assessment

机译：非对称提升管和舱底龙骨安排对FPSO绿色水评估的影响

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This article aims to report important findings on how the asymmetric riser and bilge keel arrangements affect the motion response and green water assessment by using a real FPSO conversion project. Recently, the authors have proposed a practical approach for short-term and long-term green water prediction. In this paper, the method has been further extended to include the effect of truncated bilge keel by using Morrison elements. Numerical studies are conducted focusing on the effect induced by asymmetric riser arrangement and truncated bilge keels. Comparisons of short-term and long-term results between different models indicate that the FPSO's motion is significantly affected by asymmetrically arranged appendages and attachments in a complicated way. The relative wave elevation is also affected by appendages and attachments, but not the same trend as the motion response. The effect of the asymmetric arrangement of risers and bilge keel on long-term relative wave elevation response has been captured by both traditional contour line approach and response-based analysis, but some discrepancy identified between the results from the two methods indicates the limitation of the traditional contour line approach.
机译：本文旨在通过使用真正的FPSO转换项目报告关于非对称提升机和舱底龙骨安排如何影响运动响应和绿水评估的重要发现。最近，作者提出了一种用于短期和长期绿水预测的实用方法。在本文中，进一步扩展了该方法以包括使用Morrison元素的截短舱底龙骨的效果。对非对称提升管布置和截短的舱底龙骨引起的效果进行了数值研究。不同模型之间的短期和长期结果的比较表明FPSO的运​​动受到不对称排列的封面和以复杂的方式的附着物的影响。相对波升高度也受附属和附件的影响，但与运动响应不同。通过传统的轮廓线方法和基于响应的分析，捕获了立管和舱底龙骨对长期相对波升响应的影响的影响，但是两种方法的结果识别的一些差异表示传统的轮廓线方法。

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