Passenger Capsule Door Frame Structure for Blast Resistance
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Solution Overview
Problem
Traditional military vehicles rely on conventional frame rails for lifting and structural support, which can transfer blast forces to the vehicle and occupants, and require sequential assembly of components, complicating operations such as lifting and blast resistance.
Innovation Solution
The military vehicle design incorporates a passenger capsule with integrated structural shell and modular subframes that replace traditional frame rails, featuring interlocking door frames for enhanced blast resistance and a lift structure with breakaway sections to absorb energy, allowing for improved strength-to-weight performance and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional frame rails are used for lifting and structural support, then the vehicle can be lifted and maintained structurally, but blast forces are transferred to the vehicle and occupants, and sequential assembly is required
Solution Approach 1:
The vehicle structure is divided into modular components including a passenger capsule, cab assembly, and frame rails that can be assembled sequentially. The door assembly is further segmented into door panels, interlocking door frame portions, and latching mechanisms that can be manufactured and tested independently before final assembly.
Solution Approach 2:
The harmful function of the frame rails transmitting blast forces to occupants is extracted and eliminated. Instead, the patent introduces a passenger capsule with integrated door frame portions that isolate the passenger compartment from blast forces, preventing force transmission to occupants while maintaining structural support capabilities.
2Strength
If traditional frame rails are used, then structural support is provided, but components require sequential assembly coupling to the frame rails
Solution Approach 1:
The interlocking door frame portions serve multiple functions: they provide structural support for the door assembly, create interlocking connections between door panels and the passenger capsule, and eliminate the need for separate coupling mechanisms. This multi-functionality simplifies assembly operations while maintaining structural integrity.
Solution Approach 2:
The door frame portions are merged with the passenger capsule structure, integrating the framing function directly into the capsule body. This eliminates the need for separate frame rails and coupling operations, allowing doors to be installed by directly engaging with the integrated frame portions.
3Object-affected harmful factors
If conventional door frames are used, then doors can be installed, but blast forces are not adequately resisted and interlocking engagement is insufficient
Solution Approach 1:
The door assembly uses composite construction with interlocking door frame portions made from high-strength materials that provide both structural support and blast resistance. The combination of the door panels, interlocking frame portions, and latching mechanisms creates a composite structure that resists blast forces while maintaining door functionality.
Solution Approach 2:
The interlocking door frame portions are designed with preliminary engagement features that prevent door displacement before blast forces are applied. The latching mechanism secures the door in the closed position, and the interlocking frame portions are positioned to engage and lock the door panels, creating preliminary resistance against blast forces before they can cause damage.
Data Source
AI summary
A military vehicle includes a passenger capsule. The passenger capsule includes a sidewall defining a front door aperture and a rear door aperture, a front door positioned over the front door aperture, a rear door positioned over the rear door aperture, and a latching mechanism configured to secure the front door and the rear door in a closed positioned. The sidewall includes an interlocking door frame portion positioned (i) along an exterior of the sidewall between the front door aperture and the rear door aperture and (ii) proximate the latching mechanism such that the front door and the rear door engage with the interlocking door frame portion positioned along the exterior of the sidewall between the front door aperture and the rear door aperture when the front door and the rear door are closed and engaged with the latching mechanism.