Method and device for testing vibration durability of multi-axial rack

Abstract

The invention relates to the technical field of vehicle testing, in particular to a multi-axial rack vibration durability testing method, which comprises the following steps of: in a process of simultaneously vibrating a testing part in three axial directions under a whole vehicle road durability testing working condition, acquiring a total set of weak and heavy parts of the service life of the testing part; the method comprises the following steps: in a process of vibrating a test part in a plurality of single directions under a whole vehicle road endurance test working condition, acquiring a plurality of single-direction life weak and critical part sets; performing acceleration processing on each one-way life weakness critical part set in the plurality of one-way life weakness critical part sets to obtain an acceleration power spectral density signal curve of each one-way; obtaining a triaxial acceleration power spectral density signal curve of the test part according to the total set of the life weak and critical parts; and according to each unidirectional acceleration power spectral density signal curve and the triaxial acceleration power spectral density signal curve of the test part, carrying out a vibration endurance test on the test part so as to improve the test precision.

Description

technical field [0001] The invention relates to the technical field of vehicle testing, in particular to a method and device for testing the vibration durability of a multi-axial bench. Background technique [0002] During the road durability test of the vehicle, many parts and components will be stimulated by loads from all directions on the road surface, and the road durability test of the vehicle is often long in cycle and expensive. In order to shorten the development test cycle and test cost of the vehicle, the vehicle road durability test is converted into a bench vibration durability test, that is, the vibration load excitation signal in the vehicle road durability test is converted into a bench vibration load excitation signal, and the bench vibration durability The realization of the test is very important. [0003] At present, the method of realizing the bench vibration endurance test is usually to accelerate each direction of the road load of the whole vehicle se...

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Problems solved by technology

[0004] The embodiments of the present application provide a multi-axial bench vibration durability test method and device, which solves the technical problem of low accuracy of bench vibration durability test results in the prior art when automobile parts are subjected to multi-axis vibration. Realized the transformation of the vehicle road durability test load into the accelerated load of the multi-axial bench vibration durability test, implemented the multi-axial vibration durability test for automobile parts, and improved the accuracy of the multi-axial bench vibration durability test , shorten the development and verification cycle and save the test funds of the car, which has important engineering significance and other technical effects

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