Vaulted Armored Vehicle Firewall Blast Force Distribution
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Solution Overview
Problem
Conventional armored vehicle firewalls struggle to effectively protect the passenger compartment from mine blasts without increasing the mass or thickness of the firewall partition, which is necessary due to reduced engine compartment protection.
Innovation Solution
A firewall with a vaulted profile oriented towards the engine compartment, supported by weld beads on the side walls, distributes blast forces tangentially, reducing axial forces on welds and allowing for lighter construction while maintaining protection, potentially using arched or elliptical sections and connected via mechanically welded boxes or shearable connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the firewall partition thickness is increased to protect against mine blasts, then the protection level is improved, but the vehicle mass increases
Solution Approach 1:
The firewall partition is designed with a vaulted (curved) profile instead of a flat plate. This curvature allows the partition to better distribute and resist blast forces from mine explosions, providing enhanced protection without requiring increased thickness or mass. The curved geometry optimizes the structural response to explosive loads.
Solution Approach 2:
The invention changes the geometric parameters of the firewall partition by introducing a vaulted profile with specific curvature radius and thickness variations. This parameter optimization allows the partition to achieve equivalent or superior blast resistance with reduced mass compared to conventional flat firewalls.
2Weight of moving object
If the engine compartment protection is reduced to lighten the vehicle, then the vehicle mass decreases, but the blast containment capability worsens
Solution Approach 1:
The vaulted profile of the firewall partition creates a curved barrier that more effectively contains and redirects blast forces within the engine compartment. The curvature helps to distribute the explosive forces along the partition surface, preventing direct transmission to the passenger compartment even when engine compartment armor is reduced.
3Weight of moving object
If the firewall is designed with vaulted profile, then the mass is reduced, but the manufacturing complexity increases
Solution Approach 1:
The invention specifies optimized geometric parameters for the vaulted profile, including curvature radius and thickness distribution, that balance manufacturing feasibility with performance requirements. These parameter choices allow the curved partition to be produced using conventional forming and joining techniques while achieving the desired mass reduction and blast resistance.
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 design enhances mechanical strength and reduces mass by up to 30% compared to flat partitions, maintaining equivalent resistance to mine blasts and allowing for thinner engine compartment components without increasing the firewall's mass.
Implementation Method 1
a firewall with a vaulted profile oriented towards the engine compartment, supported by weld beads on the side walls, distributes blast forces tangentially, reducing axial forces on welds
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The vehicle (1) has an engine compartment (3) and a passenger compartment (4) arranged inside a body (2), where the compartments are separated from one another by a firewall (5) extending transversely between two side walls (2a, 2b) of the body and vertically between a top wall and a floor of the body. The firewall rests directly or indirectly on the side walls, where the firewall includes an arched profile with the convexity facing towards the engine compartment. The firewall includes a central part having an arched profile prolonged on both sides of the central part by plane wings.