Vehicle Floor Panel Bead Design for Bending Strength
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle body floor structures have insufficient bending strength in the kick-up portion, leading to ineffective deformation prevention of the floor panel during collisions, and there is a need to reduce the number of parts and manufacturing costs by removing the upper reinforcing member.
Innovation Solution
A vehicle body floor structure featuring a dash cross member extending along the kick-up portion, a novel front side frame with obliquely extending outer and inner frames, and a floor panel made of high-strength steel, with beads formed to increase the closed cross-section, allowing for effective load distribution and deformation prevention without the upper reinforcing member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an upper reinforcing member is added to the floor panel, then deformation of the floor panel during collision can be prevented, but the number of parts and manufacturing costs increase
Solution Approach 1:
The invention merges the reinforcing function with the existing floor panel by forming beads directly on the panel surface. The beads create raised portions that form closed cross-sections when viewed from the rear, integrating the reinforcing function into the panel itself rather than adding separate reinforcing members.
Solution Approach 2:
The invention changes the geometric parameters of the floor panel by forming beads with specific configurations. The beads have raised portions that extend in the vehicle width direction and form closed cross-sections, which fundamentally alters the structural parameters to achieve reinforcing effects without additional parts.
2Strength
If the floor panel is made of high-strength steel, then bending strength in the kick-up portion is improved, but manufacturing costs increase
Solution Approach 1:
The invention applies local quality enhancement by forming beads only in specific regions where reinforcement is needed. The beads create closed cross-sections at critical locations (kick-up portion and areas behind the dash cross member), providing localized strengthening rather than requiring high-strength steel throughout the entire panel.
Solution Approach 2:
The invention creates a composite structure by combining the floor panel material with the bead formations. The beads form closed cross-sections that act as composite reinforcement elements, combining the base panel material with the geometric reinforcement to achieve high strength without using expensive high-strength steel alloys throughout.
3Strength
If beads are formed to extend and open rearward in a V-shape, then closed cross-section is increased in cooperation with side frames, but manufacturing complexity increases
Solution Approach 1:
The invention segments the bead formation into multiple raised portions that are distributed across the floor panel. Each bead contains raised portions that extend in the vehicle width direction, and these segmented features collectively form closed cross-sections when viewed from the rear, working in coordination with the side frames.
Data Source
AI summary
An object of the present invention is to provide a vehicle body floor structure capable of effectively preventing deformation of a floor panel by increasing bending strength of the floor panel even when an upper reinforcing member of the floor panel is removed. A vehicle body floor structure of the present invention includes a dash cross member disposed along a kick-up portion on a lower surface side of a floor panel, a novel front side frame having an outer frame and an inner frame at a rear portion of a side frame body, and a floor panel on which beads are formed to form a closed cross-section in cooperation with the outer frame and the inner frame.