Foam Charge Mounting Structure for Consistent Breaching Stand-Off

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Solution Overview

Problem

Existing methods for positioning explosive charges on structures for breaching are inefficient, requiring excessive time and lacking in reliability, as they are difficult to securely and safely mount, which affects the effectiveness of the detonation and energy release.

Innovation Solution

A mounting device comprising a laminated foam structure with two foam materials of different properties, where one layer conforms to the target surface to maintain a consistent stand-off distance and enhance energy transfer, allowing for quick and secure attachment of the explosive charge while minimizing interference with the energy release.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional mounting methods are used for explosive charges, then the positioning can be achieved, but the time required to position the explosive charge is excessive and the reliability is low

Engineering Contradiction:

Improvereliability of breachingVSAvoidtime required to position explosive charge

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The explosive charge is pre-mounted within the foam structure before deployment. The foam is configured with a cavity that holds the explosive charge in a ready-to-use state, allowing operators to simply attach the pre-prepared foam assembly to the target surface without spending time on-site positioning and securing the explosive charge.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The mounting device uses a composite foam structure combining two different foam materials with complementary properties. The first foam material provides structural support and containment for the explosive charge, while the second foam material optimizes energy transfer to the target, creating a unified pre-assembled mounting system.

Inventive Principle:

Principle #40Composite materials

2Reliability

If the explosive charge is securely mounted to ensure effective detonation, then the breaching effectiveness is improved, but the mounting process becomes more complex and time-consuming

Engineering Contradiction:

Improveeffectiveness of detonationVSAvoidcomplexity of mounting process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The mounting device merges multiple functions into a single integrated foam structure: the foam body provides structural support, contains the explosive charge in a pre-positioned cavity, ensures proper orientation, and facilitates attachment to the target. This unified design eliminates the need for separate mounting components and procedures.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

All positioning and securing operations are performed in advance during foam manufacturing. The explosive charge is pre-positioned within the foam cavity with correct orientation and spacing, so that deployment requires only simple attachment to the target surface.

Inventive Principle:

Principle #10Preliminary action

3Use of energy by moving object

If a single foam material is used for the mounting device, then the structure is simple, but the energy transfer to the target is not optimized

Engineering Contradiction:

Improveenergy transfer to targetVSAvoidstructure of mounting device

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

Different regions of the foam structure use different foam materials optimized for specific functions. The first foam material (higher density) is used where structural support and charge containment are needed, while the second foam material (lower density) is used where optimal energy transfer to the target is required, creating locally optimized performance.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The mounting device employs a composite structure with two foam materials of different densities and properties. This composite approach allows the device to simultaneously achieve structural integrity for safe handling and optimized energy transfer characteristics for effective breaching, with each material contributing its superior properties to the overall system.

Inventive Principle:

Principle #40Composite materials

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 foam mounting device reduces the time required to position the explosive charge, enhances the reliability of breaching by ensuring consistent energy release and improved cutting performance, and is lightweight and compact for easy transport.

Implementation Method 1

The material of such a target-facing layer may be a foam material with properties that do not impede, and may even enhance, the energy shock or jet produced by the explosive charge

Methodology Applied

Scientific EffectConformability: Deformation

Implementation Method 2

The material of such a target-facing layer may be a foam material with properties that do not impede, and may even enhance, the energy shock or jet produced by the explosive charge

Methodology Applied

Scientific EffectEnergy transfer: Shock Wave

Data Source

PatentEP3458804B1Mounting device for an explosive charge for breaching a structure

Publication Date: 2023.02.22 LINEAR SHAPED LTD

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Figure 4A

AI summary

The present invention relates to a mounting device for an explosive charge, comprising a first layer comprising a first foam material, and a second layer comprising a second foam material. The first layer comprises a first surface for facing a target and a second surface adjoining the second layer. The second layer comprises a recess for receiving at least one of the explosive charge.