A design method for threshold section based on the optimization of the moment of inertia of the cross section

CN116011090BActive Publication Date: 2026-05-26CHONGQING CHANGAN AUTOMOBILE CO LTD
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Patent Information

Application Number
CN202211333840.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-10-28
Publication Date
2026-05-26
Estimated Expiration
2042-10-28

AI Technical Summary

Technical Problem

Existing automotive door sill section design methods fail to effectively optimize cavity dimensions and component thickness, resulting in the inability to achieve the goals of precise design for lightweighting and cost reduction.

Method used

By using a design method based on the moment of inertia of the cross section, combined with the constraints of layout space, exterior assembly parts and process, the DOE tool is used to optimize the threshold cross section parameters to achieve performance goals and weight reduction.

Benefits of technology

The precise design of the vehicle body door sill beam has been achieved, resulting in lightweighting and cost reduction, and improving the overall vehicle performance.

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Abstract

This invention provides a design method for optimizing the sill section based on the product moment of inertia. The method decomposes the body-in-white performance target of a reference vehicle into the product moment of inertia of each section, thereby obtaining the product moment of inertia of the section at the sill beam. Then, considering boundary conditions such as layout space, exterior assembly parts, and process constraints, a preliminary sill section is fabricated. Finally, using the Design of Elements (DOE) tool, parameters are optimized based on the sill product moment of inertia target to achieve weight reduction. This allows the vehicle to achieve the performance target set by the project while also optimizing for weight reduction, thereby achieving the goal of overall vehicle lightweighting and cost savings.
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Citation Information

Patent Citations

  • Multi-objective optimization design method based on vehicle body section parameterization

    CN109977460A

  • Parameter optimization apparatus, parameter optimization method, and program

    JP2019008342A