System and method for testing body-in-white bending rigidity of automobile

Abstract

The invention discloses a system for testing the body-in-white bending rigidity of an automobile. The system comprises a constraining subsystem and a loading subsystem, wherein the constraining subsystem comprises a front suspension rack and a back suspension rack; and the loading subsystem comprises at least two power output devices and a loading device. An innovative improvement design is adopted, and the testing system can undergo self-adaptive adjustment in the testing process, so that the stress is reduced; and moreover, the testing system has extremely high generality, so that the testing requirements of different automobile types are met completely. The invention further discloses a method for testing the body-in-white bending rigidity of the automobile by using the testing device. Due to the adoption of the method, the body-in-white of the automobile can be leveled easily and quickly, and ideal test data are obtained; a testing method for the body-in-white bending rigidity is improved substantially; and compared with other conventional testing methods, the testing method disclosed by the invention has the advantage of very remarkable innovative improvements on the aspects of constraint processing, load application positions and modes, acquisition and judgment of test data, and the like.

Description

【Technical field】 [0001] The invention relates to the technical field of static stiffness testing of automobile body-in-white, in particular to a bending stiffness testing system and method for automobile body-in-white, the automobiles including but not limited to passenger cars. 【Background technique】 [0002] The static stiffness index of the automobile body-in-white generally includes bending stiffness and torsional stiffness. The bending stiffness of the body-in-white can be measured by the deformation of the front and rear of the body-in-white. Therefore, the static stiffness of the automobile body-in-white is an important index to evaluate the reliability of the vehicle design and the safety performance of the vehicle, and the analysis of the torsional stiffness and bending stiffness of the automobile body-in-white is an essential key link in the development and design of the vehicle one. [0003] According to the search, the patent documents related to the static st...

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Problems solved by technology

[0007] The technical methods and devices disclosed in the above-mentioned patent documents all have relatively complex operations, poor versatility, and are not easy to quickly and accurately test, and usually need to be specially designed and tested for different vehicle models. Manufacture of special fixtures, which increases the cost and affects the test process, but also cannot guarantee the reliability and accuracy of the static stiffness test data of the body-in-white

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