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Vehicle body fatigue testing device and testing method

A fatigue test and vehicle body technology, applied in the field of vehicle testing, can solve the problems of single loading and stress, cumbersome loading process, prolonging the test cycle, etc., achieve high accuracy and reliability, improve test accuracy, and shorten the test cycle Effect

Active Publication Date: 2019-05-21
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the bench tests are still limited to loading with constant amplitude load spectrum, but because of the single loading stress situation and the inability to reflect the real stress situation of the road, reliable test results cannot be obtained, and the entire test cycle is also prolonged
The traditional bench test device for road simulation load spectrum is not only cumbersome to install, but also the structure of the traditional loading test device and the design of the transmission path of the loading force cannot achieve the purpose of truly reflecting the force of the road, so that the test cannot be guaranteed. Accuracy and Reliability of Results

Method used

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  • Vehicle body fatigue testing device and testing method
  • Vehicle body fatigue testing device and testing method
  • Vehicle body fatigue testing device and testing method

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Experimental program
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Effect test

Embodiment 1

[0050] At present, most of the vehicle fatigue bench tests are still limited to loading with constant amplitude load spectrum, but because of the single loading stress situation and the inability to reflect the real stress situation of the road, it is impossible to obtain reliable test results, and it also prolongs the the entire test period. The traditional bench test device for road simulation load spectrum is not only cumbersome to install, but also the structure of the traditional loading test device and the design of the transmission path of the loading force cannot achieve the purpose of truly reflecting the force of the road, so that the test cannot be guaranteed. Accuracy and reliability of results.

[0051] In addition, with the continuous improvement of the vehicle structure, higher requirements are put forward for the devices and test systems in the bench test. In particular, at present, most vehicles in China are not equipped with traction mechanisms. Only in spec...

Embodiment 2

[0072] The present invention also provides a vehicle body fatigue test method, at least comprising the following steps:

[0073] Fixing the first end of the vehicle body 10 to be tested on the constraint mechanism 100;

[0074] Connect the two ends of the transition piece 210 in the transition mechanism 200 to both sides of the second end of the vehicle body 10 to be tested respectively, connect one end of the hinge 220 in the transition mechanism 200 to the non-end of the transition piece 210, and adjust the corresponding torque;

[0075] According to the preset loading spectrum, adjust the loading load of the loading mechanism 300 to be tested on the vehicle body 10, and hinge the loading mechanism 300 with the other end of the hinge 220 in the transition mechanism 200 respectively;

[0076] The final driving signal is obtained according to the preset loading spectrum, and the fatigue test is carried out.

[0077] Taking the fatigue test for testing the rear end of the bod...

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Abstract

The invention discloses a vehicle body fatigue testing device and a testing method. The testing device comprises the components of a constraining mechanism which is used for constraining and supporting the first end of a to-be-tested vehicle body; a loading mechanism which comprises at least two loading sub-mechanisms that apply a load to the to-be-tested vehicle body according to a preset loadingspectrum; and a transition mechanism which is arranged between the constraining mechanism and the loading mechanism and comprises a transition member and a hinging member. Two ends of the transitionmember are connected with the second end of the to-be-tested vehicle body. One end of the hinging member is connected with a non-end of the transition member, and the other end is hinged with the loading mechanism. The vehicle body fatigue testing device and the testing method can realize local fatigue testing of the to-be-tested vehicle in a loaded condition and furthermore have advantages of improving testing accuracy and shortening a testing period.

Description

technical field [0001] The invention relates to the technical field of vehicle testing, in particular to a vehicle body fatigue testing device and testing method. Background technique [0002] In the automotive industry, reliable performance is one of the important indicators to measure vehicle performance. According to incomplete statistics, at least 90% of the parts in the car are damaged due to fatigue damage. In the automobile research and development stage, it is necessary to predict, optimize and verify the fatigue life of the vehicle to ensure that the structural design of the vehicle can meet the fatigue damage within a reasonable life span. [0003] At present, the vehicle fatigue test is mainly a bench test method, which may include a constant amplitude load spectrum, a road simulation load spectrum, a random load spectrum, and the like. Most of the bench tests are still limited to loading with constant amplitude load spectrum, but because of the single loading s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
Inventor 周兆耀周文件刘如意王海沛
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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