Fluid Structural Member for Airplane Impact Absorption
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Solution Overview
Problem
Existing impact absorbing devices for moving bodies, such as airplanes, fail to exhibit sufficient impact absorption performance at positions without underfloor beams, limiting their effectiveness in various collision aspects.
Innovation Solution
A device featuring a fluid structural member sealed in a closed space, supported by a structural member, which utilizes Pascal's principle to distribute pressure uniformly and absorb impact forces across the moving body, with an impact absorbing member interposed between the fluid and support members to reduce load burden and enhance absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an impact absorber is provided only at the crossing portion between underfloor beams, then structural continuity and energy absorption are ensured at the crossing portion, but impact absorption performance is insufficient at positions where underfloor beams are not disposed
Solution Approach 1:
The impact absorption system is segmented into multiple independent fluid structural members distributed at different locations (crossing portion and non-crossing portions) rather than a single集中 impact absorber. This segmentation allows impact absorption to occur at multiple discrete points throughout the fuselage bottom, expanding coverage while maintaining structural integrity.
Solution Approach 2:
Fluid structural members are designed to perform multiple functions: they provide impact absorption, maintain structural continuity, and distribute loads uniformly across the fuselage. The same fluid-filled structure serves both as a cushioning element and as a structural support component, eliminating the need for separate impact absorption devices at various locations.
2Strength
If a fluid structural member is used to distribute pressure uniformly, then impact absorption performance improves in various collision aspects, but the device complexity increases
Solution Approach 1:
The patent employs fluid (hydraulic/pneumatic) principles by filling structural members with incompressible fluid. When impact force is applied, the fluid transmits pressure uniformly in all directions according to Pascal's law, providing omnidirectional impact absorption. This fluid-based mechanism replaces complex mechanical shock absorption systems with a simpler fluid-filled structure.
Solution Approach 2:
The fluid structural members change their physical parameters (pressure, volume distribution) in response to impact forces. The incompressible fluid allows the structure to deform and absorb energy while maintaining structural integrity. The parameter change of the fluid under pressure enables the structure to adapt to different collision scenarios without requiring multiple specialized components.
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
The device achieves high impact absorption performance in various collision aspects by uniformly distributing pressure and transmitting loads to high-strength members, reducing the structural burden and enhancing overall impact absorption capabilities.
Implementation Method 1
the fluid of the fluid structural member is moved into the closed space structure and generates pressure, which is substantially uniform and perpendicular to the boundary surface of the closed space structure, on the basis of Pascal's principle, and transmits the pressure
Data Source
AI summary
There is provided a device for absorbing impact applied to a moving body that can exhibit high impact absorption performance in various collision aspects when a moving body collides with an obstacle or the like.A bladder 10 is provided on the back surface of a front portion of a high-strength frame 2 of an airplane M1. The bladder 10 includes first and second sealing members 11 and 12 that are formed of elastic bag bodies in which a lubricant is sealed. When an obstacle X collides with the bladder 10, the lubricant S generates pressure, which is substantially uniform and perpendicular to boundary surfaces of the first and second sealing members 11 and 12, on the basis of Pascal's principle, and transmits the pressure. Accordingly, when the airplane M1 collides with the obstacle X, high impact absorption performance is exhibited in various collision aspects.