Body-in-White Sheet Bonding for Vibration Damping and Stiffness
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Solution Overview
Problem
Existing methods for designing automotive bodies with improved vibration-damping properties struggle to maintain stiffness while enhancing vibration-damping performance, as they often result in shapes that are difficult to manufacture or compromise other performance metrics.
Innovation Solution
A method involving the selection of automotive parts for bonding and joining sheet-like parts, optimizing their shape through topology analysis, and setting design spaces along the automotive part surfaces to enhance vibration-damping properties while maintaining stiffness, using sensitivity and optimization analysis to determine optimal sheet-like part models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optimization analysis is applied to obtain the optimized shape of the automotive part, then vibration-damping properties are improved, but the optimized shape becomes scattered three-dimensionally and cannot be manufactured by press forming
Solution Approach 1:
The patent applies local quality by focusing optimization on specific two-dimensional surfaces of the automotive part rather than the entire three-dimensional structure. The design space is limited to surface regions where sheet-like parts will be bonded, allowing vibration-damping optimization in those localized areas while maintaining manufacturability of the overall part shape.
Solution Approach 2:
The patent segments the optimization process into two stages: first identifying appropriate two-dimensional surfaces for bonding sheet-like parts, then performing topology optimization only on those surfaces. This segmentation allows the optimized shape to be manufacturable while still improving vibration-damping properties through the bonded sheet-like parts.
2Reliability
If reconfiguration of sheet thickness distribution is performed to improve vibration-damping properties, then vibration noise is reduced, but stiffness of the automotive body is reduced
Solution Approach 1:
The patent uses composite materials by bonding sheet-like parts (made of vibration-damping materials) to the automotive part. This composite structure allows the sheet-like parts to provide vibration-damping properties while the original automotive part maintains its stiffness, avoiding the need to reconfigure sheet thickness distribution.
Solution Approach 2:
The patent introduces sheet-like parts as intermediary elements between the automotive part and the vibration sources. These sheet-like parts act as mediators that absorb and dampen vibrations, allowing the original automotive part to maintain its structural stiffness while the added sheet-like parts provide vibration-damping functionality.
Data Source
AI summary
An automotive body design method designs an automotive body in which vibration-damping properties of a body-in-white structure of the automotive body is improved by bonding and joining a sheet-like part to a surface of an automotive part configuring the body-in-white structure. The automotive body design method is executed by a computer and includes: an automotive part selection step of performing sensitivity analysis of the automotive part with respect to vibration characteristics used for evaluation of the vibration-damping properties of the body-in-white structure, and selecting an automotive part to bond and join the sheet-like part; and a sheet-like part optimization analysis step of performing optimization analysis on a shape of the sheet-like part to be bonded and joined to the automotive part selected.