Vehicle Bulkhead Spanning Partition Member for Vibration Control
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Solution Overview
Problem
Existing vehicle-body structures with bulkheads in closed-section portions only on one side of partition members lack effective vibration restraint, leading to potential improper increases in parts and attaching work steps to maintain sectional shape on both sides.
Innovation Solution
A vehicle-body structure with bulkheads joined to both sides of a partition member and its vicinity or end, within a closed-section portion formed by vehicle-body forming members, enhancing rigidity and vibration restraint without additional members, using a combination of rigid and flexible joints with viscoelastic damping members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If bulkheads are arranged only on one side of the partition member, then the structure is simpler with fewer parts, but the sectional shape cannot be properly maintained on both sides and vibrations are not effectively restrained
Solution Approach 1:
The bulkhead is extended in the longitudinal direction to span across the partition member, transforming from a single-side component to a multi-position component. This dimensional extension allows one bulkhead to serve multiple functions: maintaining sectional shape on both sides of the partition member and restraining vibrations across the entire closed-section portion, thereby resolving the contradiction between structural simplicity and vibration restraint effectiveness
Solution Approach 2:
The bulkhead is designed to perform multiple functions simultaneously: it maintains the sectional shape of the closed-section portion, restrains vibrations, and provides structural support across both sides of the partition member. This multi-functionality eliminates the need for separate bulkheads on each side, achieving effective vibration restraint without increasing parts number or attaching work steps
2Manufacturing precision
If bulkheads are arranged on both sides of the partition member, then the sectional shape can be maintained on both sides, but the parts number and attaching work steps increase improperly
Solution Approach 1:
Instead of using separate bulkheads on each side of the partition member, the invention merges them into a single bulkhead that spans across the partition member in the longitudinal direction. This consolidation maintains the sectional shape on both sides while reducing the parts number from two bulkheads to one, and consequently reducing the attaching work steps, thereby resolving the contradiction between manufacturing precision and device complexity
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 configuration effectively maintains sectional shape and improves rigidity, reduces vibrations, and enhances the comfort and noise reduction in vehicles without increasing weight, by strategically placing bulkheads and using viscoelastic damping members in flexible joints.
Implementation Method 1
a bulkhead provided in the closed-section portion of the vehicle-body forming member and joined to the vehicle-body forming member, wherein the bulkhead is joined to an inner face of the vehicle-body forming member at specified positions which are located on both sides of the partition member, and the bulkhead is joined to a specified portion of the partition member
Data Source
AI summary
In a vehicle-body structure of a vehicle which comprises at least one vehicle-body forming member forming a closed-section portion continuously in a specified direction, a partition member extending in the specified direction and partitioning an inside of the closed-section portion, and a bulkhead provided in the closed-section portion and joined to the vehicle-body forming member, the bulkhead is joined to an inner face of the vehicle-body forming member at specified positions which are located on both sides of the partition member, and the bulkhead is joined to a specified portion of the partition member which is located in the vicinity of opening portions formed at the partition member or to an end portion of the partition member in the specified direction.