Isolation Mount Friction Surface to Prevent Damper Shear
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Solution Overview
Problem
Existing isolation mounts for aircraft cabin panels are prone to damage during installation and removal due to torque-induced shear forces, leading to reduced effectiveness in vibration and sound isolation.
Innovation Solution
Incorporating a panel-facing surface with a high coefficient of friction to prevent rotation of the fastener receiver, reducing the likelihood of damper damage by providing rotational resistance during fastener insertion and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rubber damping material is used between the interior panel and aircraft structure, then vibration and sound isolation is improved, but the rubber material becomes damaged during installation and removal due to torque-induced shear forces
Solution Approach 1:
A panel-facing surface with high coefficient of friction is introduced as an intermediary between the fastener receiver and the panel. This surface prevents rotation of the fastener receiver during fastener insertion and removal, thereby protecting the rubber damper from torque-induced shear forces while maintaining vibration and sound isolation effectiveness.
2Ease of operation
If fastener receiver is allowed to rotate during fastener insertion, then ease of operation is improved, but rotational motion creates shear forces that damage the rubber damper
Solution Approach 1:
The panel-facing surface with high friction coefficient applies preliminary anti-action by preventing rotation of the fastener receiver before the fastening process begins. This friction-based constraint counteracts the rotational motion that would otherwise occur during fastener insertion, eliminating the harmful shear forces on the damper while still allowing straightforward fastener operation.
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 solution effectively minimizes damage to the damper, maintaining the isolation mount's functionality and ensuring a quieter, more comfortable cabin environment by preventing shear forces from damaging the rubber damper.
Implementation Method 1
the fastener receiver comprises a panel-facing surface that provides a high coefficient of friction with the panel
Implementation Method 2
The isolation mounts establish a vibration barrier between the aircraft structure (i.e., the fuselage) and the interior cabin panels by minimizing the transmission of vibrations
Data Source
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AI summary
An isolation mount connecting a panel to a structure includes a housing disposeable on the structure, a fastener receiver with a panel-facing surface, and a damper connecting the housing to the fastener receiver. The panel-facing surface of the fastener receiver defines a static coefficient of friction between the panel-facing surface and the panel discouraging rotation of panel-facing surface around a longitudinal axis.