Vehicle Floor Panel Structure for Vibration-Resistant Rigidity
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Solution Overview
Problem
Existing vehicle floor designs with narrow cross-sectional width for improved space utilization and weight reduction compromise the rigidity, leading to increased vibration, particularly affecting vulnerable groups like the elderly and children.
Innovation Solution
A floor structure design incorporating side sills, a floor tunnel, and a floor panel with overlapping and intersecting floor frames and transverse beads that enhance rigidity in both the vehicle front-rear and width directions, suppressing vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the cross-sectional width of the floor cross member is set to be relatively narrow to achieve space utilization efficiency and weight reduction, then the weight and space utilization are improved, but the rigidity of the floor panel decreases, causing increased vibration
Solution Approach 1:
The floor panel is segmented into multiple reinforcement patterns consisting of first reinforcement sections (longitudinal) and second reinforcement sections (transverse). These segmented reinforcement elements are distributed across the floor panel to provide localized stiffness enhancement without requiring a uniformly wide cross-section throughout, thus maintaining weight efficiency while improving overall rigidity.
Solution Approach 2:
The reinforcement structure transitions from a single-dimensional (width) approach to a two-dimensional pattern by incorporating both longitudinal (front-rear direction) and transverse (width direction) reinforcement sections. This dimensional expansion allows the floor panel to gain rigidity in multiple directions simultaneously without increasing the cross-sectional width of individual members.
2Area of stationary object
If the cross-sectional width of the floor cross member is set to be relatively narrow to achieve space utilization efficiency, then the space utilization is improved, but the rigidity of the floor panel decreases, causing increased vibration
Solution Approach 1:
The floor panel is segmented into multiple reinforcement patterns consisting of first reinforcement sections (longitudinal) and second reinforcement sections (transverse). These segmented reinforcement elements are distributed across the floor panel to provide localized stiffness enhancement without requiring a uniformly wide cross-section throughout, thus maintaining space utilization efficiency while improving overall rigidity.
Solution Approach 2:
The reinforcement structure transitions from a single-dimensional (width) approach to a two-dimensional pattern by incorporating both longitudinal (front-rear direction) and transverse (width direction) reinforcement sections. This dimensional expansion allows the floor panel to gain rigidity in multiple directions simultaneously without increasing the cross-sectional width of individual members, preserving space utilization.
3Strength
If the floor panel rigidity is increased to suppress vibration, then the vibration suppression is improved, but the structure becomes more complex or heavier
Solution Approach 1:
The reinforcement patterns are merged with the existing floor panel structure rather than being added as separate components. The first and second reinforcement sections are integrated into the floor panel design, combining the structural reinforcement function with the floor panel itself, thus increasing rigidity without proportionally increasing structural complexity.
Solution Approach 2:
The design changes local geometric parameters of the floor panel by introducing reinforcement sections with specific width and length dimensions. By optimizing these parameters, the floor panel achieves enhanced rigidity through geometric modification rather than adding complex mechanical components, thus suppressing vibration with relatively simple structural changes.
Data Source
AI summary
A floor structure for a vehicle is capable of suppressing vibration of a floor panel with a simple structure. The floor structure for the vehicle includes: side sills, which are disposed on opposite outer sides of the vehicle in a vehicle width direction; a floor tunnel, which is disposed on an inner side in the vehicle width direction in parallel with the side sills; and a floor panel, which is disposed between the side sill and the floor tunnel, and includes a floor frame extending along a vehicle front-rear direction and multiple transverse beads extending along the vehicle width direction. At least a part of the transverse beads extends to a position overlapping with the floor frame and intersects with the floor frame.