Vehicle Pillar Reinforcement for Vibration Control
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Solution Overview
Problem
Vibrations from the road cause significant distortion and noise in the pillars next to the back door of vehicles, leading to reduced structural rigidity and increased vibration.
Innovation Solution
A tubular pillar design with a vertical member connected below and a reinforcing member inside the pillar at the connection point, increasing the rigidity by distributing forces and mitigating cross-sectional distortion, thereby reducing vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the pillar is made with a tubular shape and connected to the vertical member, then the structural rigidity is improved, but the cross-section of the pillar distorts due to force acting on the outer wall, generating vibration
Solution Approach 1:
A reinforcing member is nested inside the tubular pillar at the connection position with the vertical member. The reinforcing member has a shape that corresponds to the cross-sectional shape of the pillar and is joined to the inner wall of the pillar, providing internal support to prevent cross-sectional distortion and reduce vibration caused by forces from the vertical member connection.
Solution Approach 2:
The reinforcing member is specifically positioned at the connection position between the pillar and the vertical member, where vibration and distortion occur most intensely. This localized reinforcement provides targeted support to the critical area without adding unnecessary weight or complexity to the entire pillar structure.
2Object-generated harmful factors
If the vertical member is connected to the pillar from below, then the vibration of the entirety of the pillar is reduced, but force acts on the outer wall causing cross-sectional distortion
Solution Approach 1:
The reinforcing member is placed inside the pillar at the connection point, nested within the tubular structure. This internal reinforcement counteracts the distorting forces applied to the outer wall by the vertical member connection, maintaining the pillar's cross-sectional shape while allowing the vertical connection to function for vibration reduction.
Solution Approach 2:
The reinforcing member acts as an intermediary structural element between the outer wall of the pillar and the internal space. It mediates the forces applied by the vertical member connection, distributing the stress and preventing direct transmission of distorting forces to the pillar's cross-section.
Data Source
AI summary
A vehicle may include: a roof; a back door; a pillar provided next to the back door, having a tubular shape, and extending slantingly downward and backward from the roof; a vertical member provided below the pillar, extending along a vertical direction, and connected to the pillar from below; and a reinforcing member provided inside the pillar at a connection between the pillar and the vertical member and joined to the pillar.