A method and system for optimizing overall rigidity of a vehicle body

Through the optimization method based on the body rigid model, the component stiffness is changed and highly sensitive components are identified through mathematical models, the existing body overall stiffness optimization methods are solved, and efficient and accurate overall stiffness optimization of the body is achieved.

CN115587425BActive Publication Date: 2025-03-21DONGFENG MOTOR GRP
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Patent Information

Application Number
CN202211201275.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-09-29
Publication Date
2025-03-21
Estimated Expiration
2042-09-29

AI Technical Summary

Technical Problem

The existing overall body stiffness optimization method is time-consuming, long cycle, low efficiency, and is too much affected by human factors, making it difficult to ensure the accuracy of optimization.

Method used

Based on the body rigidity model, by changing the stiffness of a single or multiple components, detecting the changes in the overall stiffness of the vehicle body, performing curve fitting to obtain a logarithmic function, determining the mathematical model, identifying highly sensitive components and improving their rigidity, in order to improve the rigidity of the overall body.

Benefits of technology

It achieves the accuracy and efficiency of the overall stiffness optimization of the car body, quickly position highly sensitive components, reduce trial and error time, improve optimization efficiency, and ensure the accuracy of the overall stiffness optimization of the car body.

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Abstract

The present invention discloses a method and system for optimizing the overall rigidity of a vehicle body, and relates to the field of vehicle design and manufacturing. The method includes obtaining the sum of strain energies of a single component or multiple components, the total strain energy of the vehicle body, and the overall rigidity of the vehicle body based on a vehicle body rigidity model; changing the rigidity of a single component or multiple components, and detecting the corresponding change in the overall rigidity of the vehicle body at the same time; performing curve fitting between the rigidity change rate of a single component or multiple components and the change rate of the overall rigidity of the vehicle body to obtain a logarithmic function; determining a mathematical model based on the overlap between the curve where the logarithmic function is located and the curve drawn using the proportion of the strain energy of the current component in the total strain energy of the vehicle body as a logarithmic coefficient; determining highly sensitive components of the vehicle body based on the mathematical model and the proportion of the strain energy of each component in the total strain energy of the vehicle body; improving the rigidity of the highly sensitive components to enhance the rigidity of the overall vehicle body. The present invention can ensure the accuracy of optimizing the overall rigidity of the vehicle body.
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