Wire Mesh Core Structural Panel Vibration Damping
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Solution Overview
Problem
Current structural panels used in aircraft systems, despite their benefits, still face challenges in reducing weight and manufacturing costs while effectively dissipating vibrational energy and attenuating acoustic noise.
Innovation Solution
A structural panel design featuring a core composed of geometric structures formed from a wire mesh, which extends between two skins and allows for relative movement to dissipate intermittent excitation forces, potentially reducing weight and manufacturing costs while maintaining structural integrity and noise attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional light-weight cores (honeycomb or foam) are used, then structural integrity and vibration damping are improved, but weight and manufacturing cost reduction are limited
Solution Approach 1:
The patent employs a wire mesh core with inherent porosity and open structure that provides structural integrity while maintaining low weight. The mesh configuration allows for high strength-to-weight ratio without requiring solid filling materials like traditional foam or honeycomb structures.
Solution Approach 2:
The invention combines wire mesh material with skin layers to create a composite sandwich structure. This composite approach integrates the high strength of the wire mesh with the protective skins, achieving optimal structural performance with reduced weight compared to traditional single-material cores.
2Loss of energy
If traditional light-weight cores are used, then vibration energy dissipation is improved, but manufacturing cost reduction is limited
Solution Approach 1:
The wire mesh core structure provides self-damping capabilities through its inherent geometry and material properties, dissipating vibrational energy without requiring additional damping materials or complex active control systems. This self-service approach reduces manufacturing complexity and cost.
Solution Approach 2:
The porous wire mesh structure dissipates vibrational energy through friction and air resistance within the mesh voids, providing effective damping without requiring dense solid materials or additional damping treatments, thereby reducing manufacturing costs.
3Weight of moving object
If wire mesh core with relative movement capability is used, then weight and manufacturing cost are reduced, but structural stability may be compromised
Solution Approach 1:
The wire mesh core is designed with controlled flexibility that allows limited relative movement between wires to dissipate energy, while the overall mesh structure and skin attachments maintain structural stability. This dynamic design enables both weight reduction and stability preservation.
Solution Approach 2:
The wire mesh acts as a flexible yet stable core structure that can deform elastically under load and return to its original configuration. This flexibility allows for weight reduction while the mesh geometry and skin attachments ensure structural stability is maintained.
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 structural panel effectively dissipates vibrational energy and attenuates noise, offering improved performance and reduced weight and manufacturing costs through the use of a wire mesh core that allows for frictional contact between wires, converting vibrational energy into heat.
Implementation Method 1
The core includes a plurality of wire elements, which wire elements are configured to permit relative movement there between in a manner that at least partially dissipates intermittent excitation forces applied to the structural panels
Data Source
AI summary
A structural panel includes a first skin, a second skin and a core. The core is connected to the first skin and the second skin. The core includes a corrugated sheet of wire mesh that includes a plurality of corrugations. Each of the corrugations extends vertically between and engages the first skin and the second skin.