Cuboid Pressure Vessel Bottom Wall Reinforcement Rib Design
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Solution Overview
Problem
Cuboid pressure vessels experience stress concentration and weight issues due to uneven stress distribution, which existing reinforcement rib configurations do not adequately address, limiting weight reduction while meeting design requirements.
Innovation Solution
The pressure vessel design includes a bottom-wall reinforcement rib only in the central section, excluding corner sections and areas adjacent to lids, to reduce material usage and stress concentration, allowing for a more even stress distribution and weight reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcement ribs are provided in all areas of the bottom wall, then the bottom wall is sufficiently reinforced, but the pressure vessel weight increases and material usage is excessive
Solution Approach 1:
The patent applies local quality by providing reinforcement ribs only in specific areas of the bottom wall where stress concentration occurs (central section and corner sections), while excluding areas adjacent to lids where lids themselves provide reinforcement. This localized reinforcement approach reduces material usage and weight while maintaining sufficient structural strength where needed.
2Strength
If reinforcement ribs are provided in the region adjacent to the lid, then the bottom wall is reinforced, but stress distribution becomes uneven and the region is excessively reinforced
Solution Approach 1:
The patent excludes reinforcement ribs from areas adjacent to lids because the lids themselves provide sufficient reinforcement to these regions. This prevents excessive reinforcement and promotes more uniform stress distribution across the bottom wall, as ribs are placed only where they are truly needed for stress management.
3Ease of manufacture
If a cuboid shape is used for the pressure vessel, then manufacturing is simplified, but stress concentration occurs at multiple sites compared to spherical or cylindrical shapes
Solution Approach 1:
The patent addresses the stress concentration inherent in cuboid shapes by applying localized reinforcement ribs at specific high-stress areas (corner sections and central section of the bottom wall). This allows the vessel to maintain the manufacturing advantages of a cuboid shape while compensating for stress concentration through targeted reinforcement rather than requiring a change to spherical or cylindrical geometry.
Data Source
AI summary
A cuboid pressure vessel comprises a top wall, a bottom wall, and an external wall. The external wall comprises a main body including a first side wall having a first opening, and a second side wall having a second opening; a first lid secured to the first side wall so as to occlude the first opening; and a second lid secured to the second side wall so as to occlude the second opening. The bottom wall comprises a main body; and a reinforcement rib provided in an upright manner on the outer surface of the main body. The reinforcement rib is provided in an upright manner on the outer surface of an area, within the main body, which contains a central section of the main body, and which excludes four corner sections, a region adjacent to the first lid and a region adjacent to the second lid.