Aircraft Cabin Subfloor Venting for Floor Mat Buckling
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Solution Overview
Problem
Aircraft cabin floor mats experience bubbling and buckling due to air pockets trapped beneath them, caused by pressure differentials during flight, which existing solutions like additional adhesive or perforations in the mats fail to fully address, leading to aesthetic issues and safety concerns.
Innovation Solution
The aircraft cabin subfloor is designed with a laminate structure featuring a first rigid sheet with perforations, an open cell core panel, and a second rigid sheet, forming flow paths that vent trapped air pockets to equalize pressure, preventing bubbling and buckling of the air impermeable floor mat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If adhesive is applied in a loop pattern to secure the floor mat periphery to the subfloor, then the floor mat is held in place, but air pockets are trapped beneath the floor mat causing bubbling and buckling
Solution Approach 1:
The subfloor is designed with a porous or permeable structure that allows air to pass through it. This enables trapped air pockets beneath the floor mat to escape through the subfloor material, preventing bubbling and buckling while maintaining the adhesive loop pattern for secure installation
Solution Approach 2:
The subfloor acts as an intermediary between the floor mat and the underlying structure. By incorporating air-permeable characteristics, it mediates the pressure differential issue by allowing air to pass through, thus preventing the harmful effects of trapped air pockets
2Strength
If more adhesive is applied between the floor mat and subfloor to eliminate air pockets, then adhesion is improved, but air pockets cannot escape and bubbling still occurs
Solution Approach 1:
The subfloor's porous structure allows air to escape even when adhesive is applied extensively. The permeability enables air pockets to find pathways through the subfloor material, preventing bubbling while maintaining strong adhesive bonding
3Strength
If the entire bottom surface of the floor mat is adhered to the subfloor, then adhesion is maximized, but floor mat replacement becomes difficult
Solution Approach 1:
The adhesive application is segmented into a loop pattern around the periphery rather than continuous coverage. This segmentation provides sufficient holding strength while leaving the center area free of adhesive, enabling easy floor mat removal and replacement
4Object-affected harmful factors
If perforations are added to the floor mat to allow air escape, then air venting is improved, but debris clogs the perforations and cleaning becomes difficult
Solution Approach 1:
Instead of adding perforations to the floor mat (which causes clogging issues), the solution inverts the approach by making the subfloor itself air-permeable. The air escape pathways are provided in the subfloor rather than the floor mat, eliminating the clogging problem while maintaining effective air venting
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 laminate structure effectively prevents bubbling and buckling by venting air pockets through the subfloor, maintaining the floor mat's appearance and safety, while allowing for easy replacement and minimizing debris accumulation.
Implementation Method 1
The air pockets or air filled voids 8 trapped beneath the floor mat 2 are at a higher pressure than the aircraft air above the floor mat 2. Thus, the air pockets or air filled voids 8 trapped beneath the floor mat 2 expand due to the lower pressure above the floor mat 2.
Implementation Method 2
The laminate structure or more specifically the laminate aircraft cabin floor structure of this disclosure overcomes the problem of bubbling and/or buckling of the air impermeable aircraft cabin floor mat due to air pockets or air filled voids trapped between the floor mat and the aircraft cabin subfloor being at a higher pressure than the aircraft cabin pressure.
Data Source
AI summary
An aircraft cabin subfloor construction has flow paths through the subfloor that vent air pockets trapped beneath an air impermeable floor mat on the subfloor where, due to a difference in pressure in the air pockets trapped beneath the floor mat and the air in the aircraft cabin above the floor mat, the air pockets would create bubbles or buckling in the floor mat. The venting of the air pockets beneath the floor mat by the flow paths eliminates the problem of bubbling or buckling in the floor mat.