CN-121977857-A - Method and device for determining durability degree of overhead bin, vehicle and storage medium

CN121977857ACN 121977857 ACN121977857 ACN 121977857ACN-121977857-A

Abstract

The application discloses a method and a device for determining the durability of an overhead bin, a vehicle and a storage medium. The method comprises the steps of responding to the fact that a vehicle to be tested runs in a road condition to be tested, obtaining acceleration response signals of at least one position to be tested in an overhead box of the vehicle to be tested, determining displacement driving signals corresponding to the position to be tested under the acceleration response signals, wherein the displacement driving signals are used for representing the moving state of the position to be tested, driving a dynamic model corresponding to the overhead box by the displacement driving signals, determining stress strain data of the overhead box under the road condition to be tested, and determining service life data of the overhead box based on the stress strain data, wherein the service life data are used for representing the durability degree of the overhead box. The application solves the technical problem of low verification efficiency of the overhead box.

Inventors

YAN XIN
PEI YONGHONG
Quan Xinhui
SUN YANBAO
ZHAO YIPU
ZHAI YUNLONG
CHENG YUTING
CUI YAOYU
SUN JIAMEI

Assignees

一汽解放汽车有限公司

Dates

Publication Date: 20260505
Application Date: 20260311

Claims (10)

1. A method of determining the durability of an overhead bin, comprising: responding to the running of a vehicle to be tested in a road condition to be tested, and acquiring acceleration response signals of at least one position to be tested in an overhead box of the vehicle to be tested; Determining a displacement driving signal corresponding to the position to be detected under the acceleration response signal, wherein the displacement driving signal is used for representing the moving state of the position to be detected; Driving a dynamic model corresponding to the overhead box by using the displacement driving signal, and determining stress-strain data of the overhead box under the road condition to be tested, wherein the dynamic model is used for representing stress-strain response characteristics of the overhead box under the load action, and the stress-strain data is used for representing the stress state of the overhead box at the position to be tested; Life data of the overhead bin is determined based on the stress-strain data, wherein the life data is used to characterize a degree of durability of the overhead bin.
2. The method according to claim 1, wherein determining a displacement drive signal corresponding to the position to be detected under the acceleration response signal comprises: And taking the acceleration response signal as a target response, taking the dynamic model as a system transfer function, and reversely pushing and determining the displacement driving signal corresponding to the position to be detected.
3. The method according to claim 1, wherein the method further comprises: creating a plurality of sub-models, wherein the plurality of sub-models are respectively used for representing the overhead box, the clamp in the vehicle to be tested and a sensor for acquiring the acceleration response signals; determining connection relations among a plurality of sub-models; constructing a finite element model corresponding to the overhead bin, wherein the finite element model is used for representing a plurality of structures in the overhead bin, and geometric properties and material properties of the structures; And constructing and obtaining the dynamic model based on the finite element model, the plurality of sub-models and the connection relation.
4. The method according to claim 1, wherein the driving the dynamic model corresponding to the overhead bin by using the displacement driving signal, determining stress-strain data of the overhead bin under the road condition to be tested, includes: Driving the dynamic model by using the displacement driving signal to obtain a modal participation factor, wherein the modal participation factor is used for representing the excitation degree of the overhead bin under at least one mode; and coupling the modal participation factors with modal stress of the overhead bin to obtain the stress-strain data, wherein the modal stress is used for representing stress distribution conditions of at least one modal of the overhead bin.
5. The method of claim 1, wherein the determining life data of the overhead bin based on the stress-strain data comprises: Determining material types corresponding to a plurality of structures in the overhead bin; determining a cyclic stress-strain curve and a strain life curve corresponding to the material type, wherein the cyclic stress-strain curve is used for representing plastic deformation characteristics corresponding to the material type, and the strain life curve is used for representing fatigue life rules corresponding to the material type; and converting the stress-strain data by using the cyclic stress-strain curve and the strain life curve to obtain the life data.
6. A device for determining the durability of an overhead bin, comprising: The acquisition unit is used for responding to the running of the vehicle to be tested in the road condition to be tested and acquiring acceleration response signals of at least one position to be detected in an overhead box of the vehicle to be tested; the first determining unit is used for determining a displacement driving signal corresponding to the position to be detected under the acceleration response signal, wherein the displacement driving signal is used for representing the moving state of the position to be detected; The processing unit is used for driving a dynamic model corresponding to the overhead box by using the displacement driving signal, and determining stress-strain data of the overhead box under the road condition to be tested, wherein the dynamic model is used for representing stress-strain response characteristics of the overhead box under the load action, and the stress-strain data is used for representing the stress state of the overhead box at the position to be tested; and a second determining unit configured to determine life data of the overhead bin based on the stress-strain data, wherein the life data is used to characterize a durability degree of the overhead bin.
7. A vehicle, characterized by being adapted to perform the method of any one of claims 1 to 5.
8. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored program, wherein the program, when run, controls a device in which the computer readable storage medium is located to perform the method of any one of claims 1 to 5.
9. A processor for running a program, wherein the program when run by the processor performs the method of any one of claims 1 to 5.
10. A computer program product comprising computer instructions which, when executed by a processor, implement the method of any one of claims 1 to 5.

Description

Method and device for determining durability degree of overhead bin, vehicle and storage medium Technical Field The present application relates to the field of reliability and durability, and more particularly, to a method, apparatus, vehicle, and storage medium for determining the durability of an overhead bin. Background At present, an overhead bin is a special storage device mounted above the top of a vehicle, and generally adopts a modularized frame structure, so that a stable three-dimensional space is formed through a cross beam, a longitudinal beam, a partition plate and a support column. The durability is one of the important properties that the car overhead bin structure must meet, and once fatigue fracture and drop occur to the overhead bin assembly and the fixing points, the safety of passengers in the car is greatly threatened. In the related art, the durability control and verification of the overhead bin of the automobile all use a bench or road durability test, a sample car and a sample piece need to be manufactured in a trial mode, the cost is high, the problem is found late, the development period is overlong, and the technical problem of low verification efficiency of the overhead bin exists. In view of the above problems, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the application provides a method and a device for determining the durability of an overhead box, a vehicle and a storage medium, which are used for at least solving the technical problem of low verification efficiency of the overhead box. According to one aspect of the embodiment of the application, a method for determining the durability of an overhead box is provided, and the method can comprise the steps of responding to the condition that a vehicle to be tested runs in the condition to be tested, obtaining acceleration response signals at least one position to be tested in the overhead box of the vehicle to be tested, determining displacement driving signals corresponding to the position to be tested under the acceleration response signals, wherein the displacement driving signals are used for representing the moving state of the position to be tested, driving a dynamic model corresponding to the overhead box by utilizing the displacement driving signals, determining stress strain data of the overhead box under the condition to be tested, wherein the dynamic model is used for representing the stress strain response characteristics of the overhead box under the load, the stress strain data are used for representing the stress state of the overhead box at the position to be tested, and determining service life data of the overhead box based on the stress strain data, wherein the service life data are used for representing the durability of the overhead box. Optionally, determining the displacement driving signal corresponding to the position to be detected under the acceleration response signal comprises taking the acceleration response signal as a target response and taking the dynamic model as a system transfer function to reversely determine the displacement driving signal corresponding to the position to be detected. Optionally, the method further comprises the steps of creating a plurality of sub-models, wherein the plurality of sub-models are used for representing the overhead bin, the clamp in the vehicle to be tested and the sensor for collecting acceleration response signals, determining connection relations among the plurality of sub-models, constructing a finite element model corresponding to the overhead bin, wherein the finite element model is used for representing a plurality of structures in the overhead bin and geometric characteristics and material characteristics of the structures, and constructing a dynamics model based on the finite element model, the plurality of sub-models and the connection relations. The method comprises the steps of obtaining a modal participation factor by driving a dynamic model corresponding to an overhead box by a displacement driving signal, wherein the modal participation factor is used for representing the excitation degree of the overhead box under at least one mode, coupling the modal participation factor with the modal stress of the overhead box, and obtaining stress-strain data, wherein the modal stress is used for representing the stress distribution condition of the overhead box under at least one mode. The method comprises the steps of determining material types corresponding to a plurality of structures in an overhead box, determining cyclic stress-strain curves and strain life curves corresponding to the material types, wherein the cyclic stress-strain curves are used for representing plastic deformation characteristics corresponding to the material types, the strain life curves are used for representing fatigue life rules corresponding to the material types, and converting the stress-strain data by utilizing the cycli