Experimental study on surface wave interaction with submerged tensioned barriers using IoT image processing

IF 2.4 3区 环境科学与生态学 Q2 ENGINEERING, CIVIL Journal of Hydro-environment Research Pub Date : 2024-02-20 DOI:10.1016/j.jher.2024.02.003
Cheng Bi , Yong Jia Toh , Adrian Wing-Keung Law , Mao See Wu
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Abstract

The present study investigated experimentally the dynamic interactions between surface waves and submerged vertical tensioned barriers with full and partial penetrations. The range of tension for the barrier was set within the flexible membrane regime in the experiments which measurements have not been reported in the literature so far. In addition, an extensive Internet of Things (IoT) system with five GoPro cameras was developed for the measurements to quantify both the surface wave transformation as well as dynamic response of the barrier. The cameras were synchronized through the IoT system to cover the entire wave flume, and the recorded videos were converted to spatial and temporal data using image processing techniques. The experimental results were found to agree with the analytical predictions based on the linear wave theory reasonably well. In particular, the measured reduction in the tensioning effect on the wave transmission and reflection with decreased barrier length was in close argument with the predictions. Similar good agreement was also observed for the dynamic response of the tensioned barrier during the wave interaction. However, additional energy loss was noted in the experiments possibly due to energy dissipation at the boundary ends of the experimental barrier and wave-induced flow separation with partial penetration which are not considered in the analytical analysis.

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利用物联网图像处理技术对表面波与水下张力屏障相互作用的实验研究
本研究通过实验研究了表面波与全部和部分穿透的水下垂直张力屏障之间的动态相互作用。在实验中,屏障的张力范围被设定在柔性膜体制内,迄今为止,文献中尚未报道过这种测量方法。此外,还开发了一套广泛的物联网(IoT)系统,配备了五台 GoPro 摄像机,用于测量屏障的表面波转换和动态响应。摄像机通过物联网系统同步覆盖整个波浪水槽,并利用图像处理技术将录制的视频转换为空间和时间数据。实验结果与基于线性波理论的分析预测结果相当吻合。特别是,随着屏障长度的减小,测得的张力效应对波浪传播和反射的影响减小,这与预测结果非常吻合。在波浪相互作用过程中,拉伸屏障的动态响应也观察到了类似的良好一致性。然而,在实验中还发现了额外的能量损失,这可能是由于实验屏障边界两端的能量耗散以及部分穿透时波引起的流体分离造成的,而在分析中并没有考虑到这一点。
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来源期刊
Journal of Hydro-environment Research
Journal of Hydro-environment Research ENGINEERING, CIVIL-ENVIRONMENTAL SCIENCES
CiteScore
5.80
自引率
0.00%
发文量
34
审稿时长
98 days
期刊介绍: The journal aims to provide an international platform for the dissemination of research and engineering applications related to water and hydraulic problems in the Asia-Pacific region. The journal provides a wide distribution at affordable subscription rate, as well as a rapid reviewing and publication time. The journal particularly encourages papers from young researchers. Papers that require extensive language editing, qualify for editorial assistance with American Journal Experts, a Language Editing Company that Elsevier recommends. Authors submitting to this journal are entitled to a 10% discount.
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