Experimental study of coupling response characteristics of offshore monopiles, seabed, and waves in various sea conditions.

IF 3.8 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Scientific Reports Pub Date : 2024-11-19 DOI:10.1038/s41598-024-79858-2

Hailin Ye, Yaojiang Fan, Wenjing Bai, Chuwei Jiang

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引用次数: 0

Abstract

As the global pursuit of renewable energy intensifies and the demand for offshore wind turbines rises, a comprehensive understanding of the coupling response characteristics of offshore monopiles, seabed, and waves in various sea conditions has become increasingly crucial. This paper reports on a wave flume experiment and seeks to contribute valuable insights by examining the coupling response of offshore monopiles, seabed, and waves exerting a relentless influence. The experimental results indicate that the impact of waves on monopiles is significant: there is greater pressure on the wave facing surface of the offshore piles than the other faces, and the pressure increases with increased wave height as well as the height of the monopile. The wave impact also gives rise to pile motion, squeezing the soil near the monopile and causing gradual pore water pressure around the monopile, and when the wave impact is strong enough, the monopile loses stability. Finally, the experimental results indicate significant differences in the coupling response characteristics of an offshore monopile, the seabed, and waves in various sea conditions. When the wave height was small, the pore water pressure attenuated quickly in the direction of the depth of the seabed; however, as the height and period of waves increased, when the test wave height was more than 18.6 cm and the period was more than 1.63 s, the dynamic pore water pressure around the monopile first decreased and then increased along the depth direction, which, generated by the wave impact, led to vibration and squeezing of the soil near the monopile leg. This indicates that the closer the pile bottom, the more intense the squeezing. By investigating this development across different sea conditions, this study provides a nuanced understanding that can inform the design of offshore monopiles in the face of various marine environmental challenges.

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各种海况下近海单桩、海床和波浪耦合响应特性的实验研究。

随着全球对可再生能源追求的加强和对海上风力涡轮机需求的增加，全面了解各种海况下海上单桩、海床和波浪的耦合响应特性变得越来越重要。本文报告了一个波浪水槽实验，试图通过研究近海单桩、海床和施加无情影响的波浪的耦合响应，提出有价值的见解。实验结果表明，波浪对单桩的影响很大：近海单桩的波浪面比其他面承受更大的压力，而且压力随着波浪高度和单桩高度的增加而增加。波浪冲击还会引起桩体运动，挤压单桩附近的土壤，使单桩周围的孔隙水压力逐渐增大，当波浪冲击足够强时，单桩就会失去稳定性。最后，实验结果表明，在不同海况下，近海单桩、海床和波浪的耦合响应特性存在显著差异。当波浪高度较小时，孔隙水压力沿海床深度方向迅速衰减；但随着波浪高度和周期的增加，当试验波浪高度大于 18.6 厘米、周期大于 1.63 秒时，单桩周围的动态孔隙水压力沿深度方向先减小后增大，波浪冲击产生的孔隙水压力导致单桩桩腿附近的土壤发生振动和挤压。这表明，越靠近桩底，挤压越强烈。通过研究不同海况下的这种变化，本研究提供了一种细致入微的理解，可为面对各种海洋环境挑战的近海单桩设计提供参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scientific Reports Natural Science Disciplines-

CiteScore

7.50

自引率

4.30%

发文量

19567

审稿时长

3.9 months

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