Corrugated Blast Frequency Control Panel
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Solution Overview
Problem
Current explosive blast shields fail to effectively protect human tissue from traumatic injuries caused by blast pressure waves, particularly in the damaging 1000 to 3000 Hz frequency range, and do not adequately deflect or shred incoming projectiles.
Innovation Solution
A composite panel comprising a corrugated structural armor plate layer with vertically elongated ridges and V-grooves, combined with a strike surface layer of high-strength ballistic fabric that extends through ports in the plate, providing both blast frequency mitigation and projectile blockage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a steel reinforced concrete wall is used as a perimeter barrier, then protection against opportunistic blast attack is provided, but the pressure wave continues past the barrier and causes traumatic brain and lung injury to people behind the wall
Solution Approach 1:
The barrier is segmented into multiple functional layers: a rigid structural layer (corrugated armor plate) for maintaining integrity and a compliant layer (ballistic fabric) for absorbing and dissipating blast energy. This segmentation allows each layer to address specific aspects of blast protection, preventing pressure wave transmission while maintaining structural reliability
Solution Approach 2:
The invention uses a composite structure combining rigid corrugated armor plate material with compliant ballistic fabric material. This composite approach leverages the strengths of both materials: the rigid plate provides structural integrity and geometric stability, while the fabric absorbs and dissipates blast energy through deformation, effectively reducing pressure wave transmission behind the barrier
2Object-affected harmful factors
If high impedance materials such as high Young's modulus and density materials are used as a facing, then blast wave decoupling is observed, but the structure becomes heavier and more complex
Solution Approach 1:
The facing is designed with local quality variations through the corrugated geometry, creating regions of different stiffness and density. The corrugations provide localized high impedance zones that promote blast wave decoupling, while the overall structure maintains lower weight compared to a solid high-impedance material of equivalent protective capability
3Object-affected harmful factors
If simple soft foams are used to increase blast coupling with the body, then blast damage to the thorax increases, but using no foam provides less coupling
Solution Approach 1:
The invention uses a composite of rigid and compliant materials where the ballistic fabric layer acts as a controlled coupling medium. Unlike simple soft foams that increase coupling, the fabric's specific mechanical properties allow it to distribute and dissipate blast loads, providing thoracic protection while maintaining appropriate pressure transmission for structural integrity
4Use of energy by moving object
If a continuous piece of ballistic fabric is used to cover the armor plate, then the fabric can extend and elongate to absorb blast forces, but the fabric may rupture under excessive pressure
Solution Approach 1:
The ballistic fabric is pre-tensioned and secured to the corrugated armor plate before blast impact, creating a pre-conditioned system that can absorb and dissipate blast energy through controlled deformation. This beforehand preparation allows the fabric to elongate and absorb energy without rupturing, as the pre-tensioning establishes optimal stress distribution across the fabric structure
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 significantly reduces human tissue injury from blast frequencies in the 1000 to 3000 Hz range and enhances projectile blockage, while the ballistic fabric's elongation properties allow it to absorb and dissipate blast forces without rupturing, effectively shielding against explosive blasts.
Implementation Method 1
the ballistic fabric's elongation properties allow it to absorb and dissipate blast forces without rupturing
Implementation Method 2
The corrugated structural armor plate layer has a face surface projectile blockage of 0.6 to 0.8 and mitigates blast pressure waves
Implementation Method 3
The corrugated structural armor plate layer also has sharp edges that deflect and shred projectiles
Data Source
AI summary
A composite panel includes a ballistic fabric strike surface layer and an underlying structural armor plate layer. The structural armor plate layer is corrugated and includes a multiplicity of traversing ports. The traversing ports have sufficient lateral area to allow explosive blast deformation of the ballistic fabric through the structural armor plate layer. By selecting both relative port traversing void area and corrugation angle an effective projectile blockage is achieved. The composite shield is particularly effective in protecting personnel. Blast frequencies in the 1000 to 3000 Hz Cooper Injury Range component of the blast wave spectrum are attenuated. The panel has projectile shredding properties and has improved structural stability.