|Table of Contents|

Citation:
　Zhongchi Liu,Ziqi Chen,C. Guedes Soares.Net Deformation and Cage Volumes in Towed Gravity Fish Cages[J].Journal of Marine Science and Application,2026,(4):804-813.[doi:10.1007/s11804-025-00721-5]
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Net Deformation and Cage Volumes in Towed Gravity Fish Cages

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Title:
Net Deformation and Cage Volumes in Towed Gravity Fish Cages
Author(s):
Zhongchi Liu1;  Ziqi Chen2;  C. Guedes Soares1
Affilations:
Author(s):
Zhongchi Liu1;  Ziqi Chen2;  C. Guedes Soares1
1. Centre for Marine Technology and Ocean Engineering (CENTEC), Instituto Superior Técnico, Universidade de Lisboa, Lisbon 1049-001, Portugal;
2. School of Naval Architecture & Ocean Engineering, Dalian University of Technology, Dalian 116023, China
Keywords:
Gravity cage; Cage volume; Towing experiment; Net deformation; Effect of wavelength
分类号:
-
DOI:
10.1007/s11804-025-00721-5
Abstract:
The deformations of the nets and cage volumes of gravity cages are investigated through experimental and numerical methods. The gravity cage model is towed in calm water as well as in regular waves. Pressure sensors are used to measure the depths at different points on the cage net. These depths are successfully measured in calm water and long waves. A numerical model is developed using ANSYS/APDL to compute the cage deformation. The results from the numerical model align well with the experimental results. Furthermore, cage volumes are calculated using a numerical method. Notably, the cage volume decreases as flow velocity increases. Increasing the bottom weight can help counteract the reduction in cage volume. Furthermore, the cage volume reduces more substantially in short waves, while that in long waves approaches the values observed in uniform flow. Finally, the limitations of the experiment are discussed, and suggestions for further enhancements are provided.

References:

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Memo

Memo:
Received date:2025-2-14;Accepted date:2025-3-27。<br>Foundation item:Funding The first author was supported by the Portuguese Foundation for Science and Technology (Funda&#231;&#227;o para a Ci&#234;ncia e a Tecnologia-FCT) through a doctoral fellowship under Contract no. SFRH/BD/147178/2019. This work contributes to the Strategic Research Plan of the Centre for Marine Technology and Ocean Engineering (CENTEC), which is financed by the Portuguese Foundation for Science and Technology (Funda&#231;&#227;o para a Ci&#234;ncia e Tecnologia-FCT) under contract UIDB/UIDP/00134/2020. Open access funding provided by FCT|FCCN (b-on).<br>Corresponding author:Zhongchi Liu，E-mail:zhongchi.liu@centec.tecnico.ulisboa.pt
Last Update: 2026-10-16