Research Article
Research on Static Mechanical Properties of Gravity-Type Deep-Water Net Cage Floating Collar System Under Different Spacing Between Connecting Frames
Issue:
Volume 10, Issue 2, December 2026
Pages:
17-30
Received:
10 August 2026
Accepted:
20 August 2026
Published:
9 September 2026
Abstract: As global demand for seafood escalates, offshore marine aquaculture has increasingly expanded into open-ocean environments. Gravity-type deep-water net cages are widely used in marine aquaculture due to their cost-effectiveness and resistance to wave action. The floating collar system, typically constructed from high-density polyethylene (HDPE) pipes, serves as the primary load-bearing component and plays a crucial role in maintaining overall structural safety and buoyancy, with the connecting frames arrangement being particularly crucial. However, there is no standardized spacing for connecting frames, making research on their mechanical influence essential for design optimization. This study systematically evaluated the static performance of net cages under varying frame spacing and cage sizes using numerical simulation software ANSYS. Results show that under tensile loading, maximum stress increases at an accelerating rate with larger frame spacing. In contrast, under bending and torsion, stress initially rises before declining. Equivalent stiffness consistently declines with greater spacing, though the rate varies by loading condition. Furthermore, enlarging the cage circumference consistently decreases equivalent stiffness across all cases and generally elevates maximum stress, particularly under tensile and bending loads. Notably, cage circumference exerts a more pronounced impact on mechanical performance than frame spacing, particularly in bending scenarios where structural deformation is most critical. Compared to torsion, bending loads result in higher maximum stress and lower equivalent stiffness, indicating that the structure is highly vulnerable to bending-induced deformation and requires additional reinforcement. These findings can offer practical guidance for optimizing the connecting frame arrangement and improving the structural design of floating collar systems in gravity-type deep-water net cages.
Abstract: As global demand for seafood escalates, offshore marine aquaculture has increasingly expanded into open-ocean environments. Gravity-type deep-water net cages are widely used in marine aquaculture due to their cost-effectiveness and resistance to wave action. The floating collar system, typically constructed from high-density polyethylene (HDPE) pip...
Show More
Research Article
Design Parameters of Disc Levellers for the Track Loosener of a Two Pass Mounted Harrow
Abdusalim Tukhtakuziyev,
Otaboyev Mukhammad Fakhriddin o‘g‘li
,
Ermatov Valijon Abdivaitovich*
Issue:
Volume 10, Issue 2, December 2026
Pages:
31-35
Received:
6 October 2026
Accepted:
16 October 2026
Published:
31 October 2026
DOI:
10.11648/j.ae.20261002.12
Downloads:
Views:
Abstract: The article examines the improvement of the working process of a two-track mounted harrowing unit designed to improve the quality of surface soil tillage and reduce operational costs. The main shortcomings of two-track tooth harrows used under the conditions of the Republic of Uzbekistan are analyzed, including the need to periodically stop the unit for manual removal of weeds and plant residues from the working bodies, increased labor requirements, difficulties in transportation from one field to another, low maneuverability, and large overall dimensions. To eliminate these shortcomings, a two-track mounted harrowing unit has been developed, consisting of a frame, a three-point hitch, tooth harrows connected to the frame by chain links, support skids, and track loosening devices. The track loosener includes a loosening tine and disk levellers mounted on the frame by means of a parallelogram mechanism. Based on the laws and principles of agricultural mechanics, theoretical studies were conducted on the interaction of the disk levellers with the soil, and their main structural and technological parameters were substantiated. It was established that, to ensure the required levelling of the soil surface, the diameter of the disk levellers should be at least 21 cm, the working width should be 12 cm, the installation angle relative to the direction of travel should be 37°, the radius of curvature of the working surface should be 32 cm, and the distance between the disks should be 26 cm. The obtained results can be used in the development, design, and manufacture of two-track mounted harrowing units.
Abstract: The article examines the improvement of the working process of a two-track mounted harrowing unit designed to improve the quality of surface soil tillage and reduce operational costs. The main shortcomings of two-track tooth harrows used under the conditions of the Republic of Uzbekistan are analyzed, including the need to periodically stop the uni...
Show More
