Flat Aircraft Bulkhead With Inclined Stiffening Structure
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Solution Overview
Problem
Conventional aircraft bulkheads are either dome-shaped, which are lighter but require more space, or planar with reinforcing structures that save space but are heavier, necessitating a design that balances weight and space efficiency.
Innovation Solution
A flat bulkhead design with a planar exterior shell, inclined portions, and a stiffening structure comprising concentrically arranged elements, connected to an interior shell, which forms a three-dimensional structure to withstand pressure differences while minimizing space and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a dome-shaped bulkhead is used, then weight is reduced, but longitudinal space is increased
Solution Approach 1:
The patent applies curvature to the bulkhead design by incorporating a forward bulkhead with a curved front surface that transitions from a planar main portion to an inclined portion. This curved geometry provides structural strength similar to dome-shaped bulkheads while maintaining a more space-efficient profile by redirecting curvature to the front face rather than creating a full hemispherical protrusion.
Solution Approach 2:
The patent resolves the space-weight contradiction by adding dimensional complexity through the inclined portion that extends forward from the planar main portion. This creates a three-dimensional structure where the bulkhead occupies less longitudinal space while maintaining structural integrity through the angled reinforcement, effectively trading vertical/inclined space for longitudinal space efficiency.
2Length of moving object
If a planar bulkhead with reinforcing structure is used, then longitudinal space is reduced, but weight is increased
Solution Approach 1:
The patent applies local quality by providing reinforcement only where structurally necessary. The inclined portion with stiffening ribs reinforces the transition zone between the planar main portion and the front curved surface, while the central planar area remains unreinforced and lightweight. This localized reinforcement achieves the required structural strength without the excessive weight of a fully reinforced planar bulkhead.
3Strength
If a dome-shaped bulkhead is used, then structural strength is improved, but manufacturing complexity is increased
Solution Approach 1:
The patent segments the bulkhead into distinct functional portions: a planar main portion, an inclined portion with stiffening ribs, and a front curved portion. This segmentation allows each component to be manufactured and assembled separately, simplifying the manufacturing process compared to forming a complete dome shape, while maintaining structural strength through the distributed reinforcement architecture.
Data Source
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AI summary
The present disclosure relates to a bulkhead for an aircraft, that has a substantially flat shape. This is achieved by an exterior shell (130) and a stiffening structure (120) provided thereon. An interior shell (110) can be formed with or without an opening, wherein the interior shell is connected in an outer region to the exterior shell and in an inner region to the stiffening structure. Further disclosed are an aircraft having such bulkhead and a method of manufacturing such bulkhead.