Curved Rhombic Dodecahedron Reticulated Shells for Large-Span Rigidity
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Solution Overview
Problem
Existing space grid and reticulated shell structures face limitations in large-span applications, particularly in terms of structural rigidity, node complexity, and earthquake resistance, while traditional methods for forming curved reticulated shells can result in messy grids or restricted cutting positions.
Innovation Solution
A space curved reticulated shell structure formed by stacking and combining rhombic dodecahedrons, utilizing a method that includes array replication, rotation, cutting, and bending to create one-way and two-way curved structures with simple node forms and enhanced rigidity, suitable for large-span spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If traditional plane rigid frame structure is used, then the structure is simple to construct, but the span is limited due to large vertical deformation deflection
Solution Approach 1:
The patent transforms the plane rigid frame structure into a curved reticulated shell structure by applying curvature to the geometry. This curvature conversion enables the structure to utilize arc-axial compression bearing mode, significantly improving load-bearing capacity and reducing vertical deformation deflection while achieving larger spans
2Length of moving object
If curved reticulated shell structure is used to increase span, then the bearing performance and rigidity are improved, but the node structure becomes more complex
Solution Approach 1:
The patent segments the curved reticulated shell structure into multiple rhombic dodecahedron units stacked along the curvature direction. Each unit maintains simple node structures with standardized connecting rods, while the overall curved geometry achieves large span and high rigidity through the segmentation and modular assembly of these simple units
3Shape
If direct cutting method is used to form curved reticulated shell, then the grid remains regular, but the cutting position is restricted
Solution Approach 1:
The patent transitions from two-dimensional plane cutting to three-dimensional stacked assembly of rhombic dodecahedrons. This dimensional change allows the structure to achieve curved surfaces and complex shapes through spatial arrangement of modular units, eliminating cutting position restrictions while maintaining grid regularity through standardized unit repetition
4Ease of manufacture
If plane rigid frame structure is used, then the construction is simple, but the structural rigidity is insufficient for large spans
Solution Approach 1:
The patent segments the structure into standardized rhombic dodecahedron units with simple nodes and connecting rods, maintaining construction simplicity through modular assembly. The stacked three-dimensional configuration provides spatial rigidity and stability, enabling large-span structures while preserving ease of manufacture through repeated unit assembly
Solution Approach 2:
The patent transitions from two-dimensional plane rigid frame to three-dimensional stacked rhombic dodecahedron structure. This dimensional transition enhances structural rigidity and stability through spatial configuration while maintaining construction simplicity through modular unit assembly along the curvature direction
Data Source
AI summary
The invention relates to a space curved reticulated shell structure formed by stacking and combining rhombic dodecahedrons, comprising a one-way curved reticulated shell structure, a positive curvature two-way curved reticulated shell structure and a negative curvature two-way curved reticulated shell structure, the array combined revolution body is generated by rotating the orthogonal array combination body around the space rotation axis by a certain angle; boundary cutting structures are generated by the plane boundary in span direction or the curved boundary in span direction cutting the array combined revolution body; the plane boundary cutting structure respectively generates a one-way curved reticulated shell structure, a positive curvature two-way curved reticulated shell structure and a negative curvature two-way curved reticulated shell structure respectively through one-way bending arching, positive curvature two-way bending arching and negative curvature two-way bending arching.