A design method for reducing thermal deformation of an automobile exterior part and a storage medium

By optimizing the mounting points and constraint types using finite element models, the problem of thermal deformation caused by differences in the coefficients of thermal expansion of automotive exterior parts was solved, thereby reducing thermal deformation and improving product quality during the design phase.

CN122286936APending Publication Date: 2026-06-26CHONGQING CITY MANAGEMENT COLLEGE
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Patent Information

Application Number
CN202311665834.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-12-06
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Because engineering plastics have a higher coefficient of thermal expansion than metals, automotive exterior parts undergo inconsistent thermal deformation under high or low temperatures, resulting in obvious product appearance defects.

Method used

By establishing a finite element model, setting installation points and constraints, optimizing the location of installation points and the type of constraints, analyzing thermal deformation data using finite element software, and reducing local deformation and balancing the distribution of installation point offset by reinforcing ribs.

Benefits of technology

Effectively reduce thermal deformation of exterior components during the design phase, improve product quality, and enhance their resistance to deformation in high or low temperature environments.

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Abstract

This invention relates to the field of automotive technology, specifically to a design method and storage medium for reducing thermal deformation of automotive exterior parts. The method includes: establishing a finite element model of the automotive exterior parts and surrounding connectors; setting the cut-off boundary of the connectors and constraining all degrees of freedom of the cut-off boundary; setting installation constraints at the mounting points, connecting the mounting constraints to the connectors, and obtaining the first position of the mounting points; creating temperature conditions; obtaining thermal deformation data of the exterior parts through finite element software analysis, and obtaining the second position of the mounting points; calculating the offset D1 between the second position and the corresponding first position; determining whether the offset D1 is within the design target deviation D2 range; optimizing the position and constraint type of the mounting points so that the offset D1 is within the target deviation D2 range, making the offset of each mounting point evenly distributed, thereby reducing the thermal deformation of automotive exterior parts under high or low temperature environments and improving product quality.
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