Floating Anti-Sloshing Member for Liquid Cargo Holds
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Solution Overview
Problem
Conventional cargo holds for liquid cargo, such as LNG, face challenges in withstanding sloshing impacts under both standard and partial loading conditions, and existing solutions like chamfers reduce storage space and are ineffective under varying loading conditions.
Innovation Solution
A sloshing impact reducing device featuring an ascent and descent guide with a floating body that raises an anti-sloshing member to the surface of the liquid cargo, using a mesh structure with pocket-type floats to suppress sloshing by resisting liquid motion, eliminating the need for chamfers and allowing increased cargo capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If chamfers are formed at the cargo hold to reduce sloshing impact, then sloshing load is distributed and attenuated, but storage space in the cargo hold is narrowed
Solution Approach 1:
The invention extracts the sloshing reduction function from the cargo hold structure itself (chamfers) and places it in a separate, removable component (anti-sloshing member). This allows the cargo hold to maintain its full storage space while the anti-sloshing member, positioned on the liquid surface, provides sloshing attenuation without encroaching on storage volume.
Solution Approach 2:
The anti-sloshing member acts as an intermediary element between the liquid cargo and the cargo hold walls. Instead of modifying the hold structure to interact with sloshing waves, the anti-sloshing member is introduced as a mediating component that absorbs and dissipates wave energy, protecting the hold structure while preserving storage space.
2Reliability
If chamfers are formed to prevent sloshing, then sloshing impact is reduced under standard loading, but the solution is ineffective under partial loading conditions
Solution Approach 1:
The anti-sloshing member is designed to be dynamic rather than static. It can move with the liquid surface and is deployable at different positions, allowing it to adapt to varying loading conditions. Unlike fixed chamfers that only work at specific liquid levels, the anti-sloshing member can be positioned appropriately regardless of whether the cargo hold is partially or fully loaded.
Solution Approach 2:
The anti-sloshing member serves multiple functions: it provides sloshing reduction under both partial and full loading conditions, can be deployed or removed as needed, and works effectively across different liquid levels. This universal applicability resolves the limitation of chamfer-based solutions that are only effective under standard loading conditions.
3Reliability
If an anti-sloshing member is installed on the liquid surface, then sloshing impact is reduced under partial loading, but the device complexity increases
Solution Approach 1:
The anti-sloshing member utilizes a flexible, thin-walled cylindrical structure that can bend and deform with wave motion. This flexible design provides effective sloshing reduction through its ability to interact dynamically with liquid waves, while the simplicity of the cylindrical form with longitudinal slits keeps the overall device structure relatively simple despite the added functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively attenuates sloshing impacts under various loading conditions without reducing cargo hold space, enabling larger cargo volumes by maintaining the anti-sloshing member on the liquid surface to resist vessel-induced motion.
Implementation Method 1
a floating body (10) having buoyancy raising the floating body (10) to a surface of the liquid cargo
Implementation Method 2
an anti-sloshing member (2) confined to the floating body (10), maintained on the surface of the liquid by the floating body (10) to suppress sloshing of the liquid cargo
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Disclosed are a device for reducing sloshing impact of a cargo hold for liquid cargo and a method for reducing the same. According to one embodiment of the present invention, the device for reducing the sloshing impact of the cargo hold for liquid cargo comprises: a rise guide unit which is installed at a proper place in a cargo hold, and includes a buoyant floating object that floats to the surface of the stored liquid; and a sloshing prevention member, which is restrained in the rise guide unit, floats the surface of the liquid by the floating object, and suppresses sloshing of liquid cargo.