A method for analyzing vehicle body strength in the automotive concept design stage

By performing frequency domain analysis and envelope solution on the historical load database, the maximum body strength load of the dynamic load coefficient is calculated, and finite element analysis and optimization is carried out, the problem of difficulty in considering the influence of random loads in the existing technology is solved, and the efficient and lightweight design of automobile body strength analysis is achieved.

CN114861312BActive Publication Date: 2025-03-18JIANGLING MOTORS
2 Cites 0 Cited by

Patent Information

Application Number
CN202210505736.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-05-10
Publication Date
2025-03-18
Estimated Expiration
2042-05-10

AI Technical Summary

Technical Problem

In the development of automobile body, it is difficult for the prior art to effectively consider the impact of random load on the dynamic load characteristics of the vehicle body, resulting in the traditional method setting too large safety factors, affecting the lightweight design and R&D efficiency.

Method used

By performing data analysis on the historical load database, using the fast Fourier transform to obtain the frequency domain curve, perform envelope solution, build an analytical dynamic model, calculate the maximum body strength load containing the dynamic load coefficient, and apply it to the finite element analysis model for intensity analysis and optimization.

Benefits of technology

This method does not require building a multi-body dynamic model of the whole vehicle, which can effectively reduce the R&D cost and development cycle of new models, avoid excessive safety design in traditional methods, and ensure the lightweight design and efficiency of the car.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present invention relates to a vehicle body strength analysis method in the conceptual design stage of an automobile. Based on fast Fourier transform, the frequency domain curves of the vertical displacement of the wheel center of all historical vehicle models in the database are obtained; and according to the obtained frequency domain curves, the frequency domain loads of the vehicle model to be developed under all road surfaces are enveloped and solved; an analytical dynamics model of the vehicle model to be developed is constructed, and the maximum vehicle body strength load of the vehicle model to be developed including the dynamic load coefficient is obtained by calculation; and then the calculated maximum vehicle body strength load is applied to the finite element analysis model of the vehicle model to be developed to complete the strength analysis of the vehicle body to be developed. The method of the present invention can realize the body strength verification of the vehicle model to be developed without building a multi-body dynamics model of the whole vehicle, which can effectively reduce the research and development cost of the new vehicle model and shorten the development cycle, while avoiding the excessive safety factor set by the traditional method, and ensuring the lightweight design of the new vehicle model.
Need to check novelty before this filing date? Find Prior Art