Fuselage Crash Load Distribution With Battery Separation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Air mobility vehicles face safety concerns due to unmanaged crash loads that can transmit directly to passenger and cargo spaces during impacts, potentially leading to instability and fire risks from battery damage during oblique falls.
Innovation Solution
A crash load distribution structure for the fuselage, featuring a support unit that distributes loads to the wing and rear of the fuselage, and an extension frame with a deformation section to absorb crash loads, along with a battery unit that can be selectively separated from the floor frame to prevent battery-related fires during oblique crashes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the battery unit is firmly coupled to the floor frame, then structural strength is improved, but safety against fire during crash is worsened
Solution Approach 1:
The coupling between the battery unit and floor frame transitions from static (firmly coupled) to dynamic (selectively separable). The connection allows the battery unit to remain attached during normal operation for structural strength, but automatically separates when crash load exceeds a threshold, preventing fire while maintaining structural integrity through controlled disconnection.
Solution Approach 2:
The connection parameter between battery unit and floor frame changes from fixed to variable. The coupling mechanism is designed with specific mechanical properties (strength, elasticity) that allow it to maintain connection under normal loads but fail safely under excessive crash loads, changing the connection state based on load parameters.
2Device complexity
If crash load is transmitted directly to passenger space, then structural simplicity is improved, but passenger safety is worsened
Solution Approach 1:
The battery unit and extension frame serve as intermediary elements between the crash unit and passenger space. They absorb and redirect crash loads through controlled deformation and separation, preventing direct transmission of impact forces to the passenger compartment while maintaining overall structural coherence.
Solution Approach 2:
The fuselage structure is segmented into functional zones: crash unit, extension frame, battery unit, and passenger space. Each segment has specific crash management functions, with the battery unit and extension frame acting as sacrificial elements that absorb impact energy before it reaches the passenger compartment.
3Stability of the object's composition
If the battery unit remains attached during crash, then structural integrity is improved, but fire safety is worsened
Solution Approach 1:
The connection between battery unit and floor frame is designed to be dynamically responsive to load conditions. Under normal operation, the connection maintains structural integrity; under excessive crash load, the connection automatically disconnects to prevent battery damage and fire, achieving both goals through conditional attachment.
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 structure reduces the transmission of crash loads to passenger spaces, minimizes fuselage deformation, and ensures safety by separating the battery from the floor frame during oblique impacts, thereby preventing fires and enhancing overall passenger safety.
Implementation Method 1
The extension frame may include a deformation section configured to absorb a load
Data Source
AI summary
A crash load distribution structure of a fuselage may include a front fuselage frame surrounding a front surface of the fuselage, a crash unit disposed at the front end of the front fuselage frame, an extension frame coupled to the crash unit and extending to a floor frame, and a battery unit disposed under the floor frame and coupled to a portion of the floor frame constituting the floor frame. The battery unit may be selectively separable from the portion of the floor frame, e.g., if a crash load is transmitted from the extension frame.