Military Vehicle Side Wall Strut for Explosion Protection
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Solution Overview
Problem
Military vehicles are vulnerable to side explosions, with door and door cutouts being weak points that deflect significantly under pressure, requiring weight-intensive reinforcement to absorb bending forces.
Innovation Solution
Incorporating a tension/compression strut within the vehicle housing, with one end supported near the door cutout and the other on a stable interior structure like the engine tunnel, to distribute forces effectively and reduce deflection, potentially using built-in parts as mounts with stiffeners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door and door cutout are reinforced to reduce deflection under explosion pressure, then the protection level against side explosions is improved, but the vehicle weight increases significantly
Solution Approach 1:
The invention transitions from two-dimensional reinforcement (flat door and cutout reinforcement) to three-dimensional spatial support by introducing struts that extend into the vehicle interior. The struts create a spatial truss structure that distributes explosion forces throughout the vehicle interior volume, rather than concentrating them on the door assembly alone.
Solution Approach 2:
The invention employs a composite structural system combining the door assembly with separate strut elements and mounting points. This composite structure distributes loads across multiple components made of different materials and geometries, optimizing the overall strength-to-weight ratio compared to uniform reinforcement of the door alone.
2Strength
If weight-intensive reinforcement is added to the door and door cutout to absorb bending forces, then the deflection is reduced, but the structural complexity and manufacturing effort increase
Solution Approach 1:
The invention divides the load-bearing function into separate segments: the door assembly, the struts, and the mounting points in the vehicle structure. This segmentation allows each component to be optimized independently for its specific function, reducing overall complexity compared to a monolithic reinforced door structure.
Solution Approach 2:
The struts act as intermediary elements between the door cutout area and the stable interior vehicle structure. These intermediaries transfer and distribute explosion forces through the vehicle interior, reducing the direct load on the door while maintaining overall structural integrity.
3Reliability
If the door cutout area is reinforced to prevent deflection, then the protection against side explosions is improved, but the additional weight and structural effort are significant
Solution Approach 1:
The invention moves from planar reinforcement of the door cutout to three-dimensional spatial support using struts that extend into the vehicle interior. This spatial arrangement distributes forces throughout the vehicle interior volume, achieving protection with less material in the door assembly itself.
Solution Approach 2:
The struts serve multiple functions: they reinforce the door cutout area, distribute explosion forces throughout the vehicle interior, and utilize existing vehicle structure (engine tunnel housing, floor, ceiling) as mounting points. This multi-functionality reduces the need for dedicated reinforcement components.
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
This approach reduces side wall deflection by over 60% with minimal weight increase, offering enhanced protection against side explosions with reduced structural effort and weight.
Implementation Method 1
it is more favorable to absorb forces via tension/compression struts than via bending beams
Data Source
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AI summary
The invention relates to a military vehicle comprising a vehicle housing (1) that is situated on a chassis, said housing having at least one entry/exit door, located in a door cut-out (3) of at least one lateral wall (2). To support the lateral wall (2) in the vicinity of the door cut-out (3) against the lateral explosion of an explosive device, a strut (4') runs through the interior of the vehicle housing (1), the first end (4.1') of which is supported in a region of the lateral wall (2) that adjoins the door cut-out (3), whilst the second end (4.2') is supported on part of the vehicle structure that lies opposite said lateral wall, for example on the housing (5) of the motor tract.