Floor Side Member Shock Absorption
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Solution Overview
Problem
The existing vehicle structure, as disclosed in Patent Literature 1, faces limitations in layout freedom due to the narrow space required for the second front side member, which restricts the absorption of shock energy during frontal collisions.
Innovation Solution
A vehicle structure with a floor side member extending from the dash panel to the rear, reinforced by first and second reinforcements extending along the floor side member within a closed section structure, allowing effective energy absorption while maintaining layout flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a second front side member is provided on the outside in the vehicle width direction of the first front side member, then shock energy absorption capability is improved, but freedom in layout of the vehicle front part is limited
Solution Approach 1:
The second reinforcement is nested inside the closed section structure formed by the first reinforcement and floor side member. This nesting arrangement allows both reinforcements to occupy the same spatial envelope, effectively doubling the shock energy absorption capability without increasing the external dimensions or compromising layout freedom in the vehicle front part.
2Duration of action of moving object
If the floor side member extends from a position in front of the dash panel to a position behind the dash panel, then shock energy absorption in short stroke is improved, but the structural complexity increases
Solution Approach 1:
The first reinforcement, second reinforcement, and floor side member are merged to form an integrated closed section structure that spans the dash panel. This merging creates a unified load-bearing system that absorbs shock energy effectively in a short deformation stroke while minimizing structural complexity through geometric integration rather than separate 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
The structure effectively absorbs shock energy from frontal collisions by compressing the floor side member and reinforcements in a short deformation stroke, reducing deformation of the dash panel and maintaining layout freedom, even in vehicles with short front parts.
Implementation Method 1
absorb a shock energy produced by a frontal collision or the like by axial compression of the front side members in the vehicle front part
Implementation Method 2
compressing the floor side member and reinforcements in a short deformation stroke
Data Source
Figure 1
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AI summary
[Problem to be Solved] To effectively absorb a shock energy produced by a frontal collision or the like. [Solution] Provided is a vehicle structure 100 including a floor side member 30. The vehicle structure 100 includes a first reinforcement 34 extending along the floor side member 30 and forming a closed section structure C3 together with the floor side member 30, and a second reinforcement 35 extending along the floor side member 30 inside the closed section structure C3. The floor side member 30 extends from a position in front of a dash panel 10 provided in a vehicle front part to a position behind the dash panel 10 in a longitudinal direction of the vehicle. Each of the first reinforcement 34 and the second reinforcement 35 extends from a position in front of the dash panel 10 to a position behind the dash panel 10 in the longitudinal direction of the vehicle inside the floor side member 30.