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Research on Sea Trial Techniques for Motion Responses of HDPE Floating Rafts Used in Aquaculture

Authors :
Fei Fu
Xiaoying Zhang
Zhe Hu
Yan Li
Lihe Wang
Jianxing Yu
Source :
Journal of Marine Science and Engineering, Vol 12, Iss 7, p 1150 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

The innovative aquaculture equipment known as high-density polyethylene (HDPE) floating rafts has gained popularity among fishermen in the southeast coastal regions of China. Compared to deep-water anti-wave fish cages, the construction costs of HDPE floating rafts are 50% to 75% less. There is a dearth of comprehensive publicly available records of HDPE floating rafts sea trial data, despite substantial numerical studies on the motion response of aquaculture fish cages and scale model experiments under controlled-wave conditions. This study involves sea trial techniques under operational and extreme environmental conditions for motion responses of HDPE floating rafts, presents a comprehensive procedure for sea trials of HDPE floating rafts, summarizes the issues encountered during the trials, and suggests solutions. Using MATLAB for independent programming, motion videos and photos collected from the sea trials are processed for image capture, yielding the original time history curve of vertical displacement. Based on the sea trials’ data, including motion displacement, acceleration, mooring line force, overall deformation patterns, and current and wave data, recommendations are provided for the design and layout of HDPE floating rafts. Based on the Fast Fourier Transform (FFT) method for spectral analysis, the influence of interference items on the observational data is eliminated; the rationality of the observational data is verified in conjunction with the results of the Gabor Transform. This study offers a scientific analytical method for the structural design and safe operation of HDPE floating rafts and provides a reference for subsequent numerical simulations.

Details

Language :
English
ISSN :
20771312
Volume :
12
Issue :
7
Database :
Directory of Open Access Journals
Journal :
Journal of Marine Science and Engineering
Publication Type :
Academic Journal
Accession number :
edsdoj.4cea3df68a3c4cd2aed3fe2640cefdb0
Document Type :
article
Full Text :
https://doi.org/10.3390/jmse12071150