Aircraft Fuselage Floor Segmentation for Homogeneous Pressure Deformation
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Solution Overview
Problem
Conventional aircraft fuselage designs with complex shapes require active structural floors to maintain shape under pressure, leading to non-homogeneous deformation and increased mechanical loading, which complicates the architecture and reduces internal space efficiency.
Innovation Solution
Aircraft with a central fuselage part featuring a constant cross-section geometry, where the floor comprises two lateral portions fixed to opposite edges, allowing relative movement during pressure changes, providing transverse freedom and eliminating the need for an active floor, thus ensuring homogeneous deformation and increased internal space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a complex four-lobed cross section is used to optimize habitability and passenger accommodation, then internal space efficiency and passenger capacity are improved, but the fuselage experiences non-homogeneous deformation under pressure requiring an active structural floor, which increases device complexity and mechanical loading
Solution Approach 1:
The floor is segmented into two independent lateral portions that can move relative to each other. This segmentation allows each portion to independently accommodate fuselage deformation, eliminating the need for a complex active floor structure while maintaining internal space efficiency.
Solution Approach 2:
The floor transitions from a static rigid structure to a dynamic system where lateral portions can move relative to each other. This dynamic capability allows the floor to adapt to fuselage pressure changes without requiring complex active structural elements, reducing device complexity while preserving internal volume.
2Stability of the object's composition
If an active structural floor is used to maintain fuselage shape under pressure, then fuselage shape stability is improved, but mechanical loading on the floor and fuselage increases, complicating the architecture
Solution Approach 1:
The floor is designed with dynamic movement capability between lateral portions, allowing the structure to adapt to pressure-induced deformations rather than resisting them. This reduces mechanical loading while maintaining fuselage shape stability through controlled relative movement.
Solution Approach 2:
The floor structure changes its configuration parameters by allowing relative movement between lateral portions under pressure. This parameter change enables the floor to accommodate shape changes without increasing mechanical loading, simplifying the overall architecture.
3Strength
If a rigid floor structure is used to maintain fuselage geometry, then structural integrity is improved, but the floor cannot accommodate diameter changes during pressurization, increasing mechanical stress
Solution Approach 1:
The rigid floor is segmented into movable lateral portions that maintain structural integrity independently. Each segment preserves strength while the relative movement between segments accommodates diameter changes, reducing mechanical stress on the overall structure.
4Ease of manufacture
If a simplified floor structure is used to reduce device complexity, then ease of manufacture and maintenance are improved, but the ability to maintain fuselage shape under pressure deteriorates
Solution Approach 1:
The simplified segmented floor structure is easier to manufacture and install while maintaining fuselage shape through the coordinated movement of lateral portions. The segmentation enables both manufacturing simplicity and shape stability.
Solution Approach 2:
The dynamic movement capability of the simplified floor structure allows it to maintain fuselage shape under pressure without requiring complex active structural elements. The relative movement between lateral portions provides the necessary adaptability.
Data Source
AI summary
An aircraft comprising a fuselage which has a central part with a cross section of constant geometry which comprises a floor. The floor comprises two lateral portions which are fixed respectively to two opposite lateral edges of the fuselage and which enclose a central portion to which they are fixed. One of the lateral floor portions is fixed to the central portion so as to allow a relative lateral movement between the two portions in the event of a modification in pressure inside the fuselage. The cross section thus deforms homogeneously when the fuselage is pressurized and the floor is not involved in maintaining the shape of the fuselage.