Blast Jet Deflection Device for Military Vehicles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mine protection arrangements for military wheeled vehicles are inadequate in effectively deflecting and mitigating the impact of blast jets generated by booby traps, which can cause significant damage and compromise the structural integrity of the vehicle.
Innovation Solution
The integration of a blast jet deflection device comprising at least three elongate hollow profile elements with specific dimensions and spacing, positioned between the mine protection arrangement and the road surface, to deflect and absorb the kinetic energy of blast jets, thereby reducing the load on the mine protection arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-layer bulkhead structure is used for mine protection, then the vehicle gains protection against land mines and IEDs, but the structure becomes complex and heavy
Solution Approach 1:
The bulkhead is divided into multiple functional layers: a sacrificial lower sheet that absorbs initial blast energy, a center panel that maintains structural integrity, and an upper panel that prevents energy coupling. This segmentation allows each layer to perform its specific protective function while collectively providing comprehensive mine protection.
Solution Approach 2:
The bulkhead employs composite construction with different materials optimized for specific functions: the lower sacrificial sheet uses materials that can absorb blast energy through deformation, the center panel uses high-strength materials for structural integrity, and the upper panel uses materials that prevent energy transmission to the vehicle interior.
2Reliability
If the mine protection arrangement is designed to absorb blast energy, then the vehicle gains protection, but the protective structure becomes heavier
Solution Approach 1:
The blast jet deflection device extracts and redirects the harmful blast jet away from the vehicle before it can impact the main mine protection arrangement. By deflecting the blast jet laterally using profile elements, the system reduces the energy that needs to be absorbed by the bulkhead, thereby reducing the weight requirements of the protective structure.
Solution Approach 2:
The blast jet deflection device performs preliminary action by intercepting and deflecting the blast jet before it reaches the mine protection bulkhead. This preliminary deflection reduces the kinetic energy of the blast jet, so that when it impacts the bulkhead, less energy absorption is required, allowing for a lighter protective structure.
3Reliability
If the bulkhead is designed with energy absorption capabilities, then protection is improved, but the structural integrity may be compromised under repeated loading
Solution Approach 1:
Different regions of the bulkhead are designed with locally optimized properties: the lower sacrificial sheet has high energy absorption capacity with controlled deformation characteristics, the center panel has high structural integrity with minimal deformation, and the upper panel has properties optimized for preventing energy coupling. This local quality differentiation allows energy absorption without compromising overall structural integrity.
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 blast jet deflection device effectively reduces the kinetic energy of blast jets, minimizing the impact on the vehicle's underside and extending the protective life of the mine protection arrangement, while maintaining a lightweight design that can be retrofitted or integrated into new vehicles for enhanced protection.
Implementation Method 1
The blast jet deflection device (30) comprises at least three elongate hollow profile elements (31)... the hollow profile elements (31) of the blast jet deflection device (30)... in order to deflect the blast jet (15)
Implementation Method 2
Part of the energy is transformed into kinetic energy, which is converted into deformation and fracture work
Implementation Method 3
Part of the energy is transformed into kinetic energy, which is converted into deformation and fracture work
Implementation Method 4
First, a shock wave is generated in the ground material (rock, sand, water) and then immediately transferred to the ground material. This shock wave propagates in all directions through the earth material.
Implementation Method 5
After its explosion, the booby trap generates a blast jet emerging from the roadway surface
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 2a~2c
AI summary
A known military wheeled vehicle (20) has the following features: a) the military wheeled vehicle (20) includes a mine protection arrangement (21), b) the mine protection arrangement (21) has an underside (22) facing a road surface (10), c) the mine protection arrangement (21) is designed to protect against an explosive device (11) buried below the road surface (10), d) the explosive device (11) produces a blast jet (15) emerging from the road surface (10) after its explosion, the blast jet (15) being a mixture of soil material (17) and explosive gases.To achieve a high level of protection against the blast jet of an improvised explosive device, the new military wheeled vehicle additionally features a blast jet deflection device (30) with the following characteristics: e) the blast jet deflection device (30) comprises at least three elongated hollow profile elements (31), h) each hollow profile element (31) has a profile (32) with an outer profile width (D) of at least 20 mm and at most 400 mm, i) there is a clear element spacing (a) between two adjacent hollow profile elements (31) of at least 50 mm and at most 300 mm.The blast beam deflection device (30) is arranged between the underside (22) of the mine protection arrangement (21) and the road surface (10), wherein j) the hollow profile elements (31) are arranged with a clear decoupling distance (b) of at least 20 mm to the underside (22) of the mine protection arrangement (21), k) the hollow profile elements (31) are arranged at a clear distance (f) to the road surface (10) of at least 300 mm, l) the blast beam (15) is deflected by the hollow profile elements (31) while retaining partial beams (16) of the blast beam (15), a part of which is attenuated and strikes the underside (22) of the mine protection arrangement (21).