Automobile drive axle vibration simulation analysis method

Abstract

The invention provides an automobile drive axle vibration simulation analysis method. The method comprises the following steps: 1) establishing a main speed reducer transmission model of an automobiledrive axle through transmission analysis software; 2) extracting positioning size information of a bearing center point of a main speed reducer; 3) establishing a shell finite element model of a drive axle shell through finite element software; 4) generating a mass and rigidity matrix of a bearing center point; 5) importing the mass and rigidity matrix of the central point of a bearing into transmission analysis software; 6) outputting dynamic displacement information of the bearing center point under different working conditions; 7) calculating the shell vibration response under the bearingload. Finite element software and professional transmission analysis software are combined, the test amount is reduced, the test period is shortened, a simulation model is used for optimizing and improving the drive axle, the improvement effect is checked before formal improvement and implementation, and the production cost of enterprises is saved.

Description

technical field [0001] The invention belongs to the field of vehicle transmission system and NVH, and in particular relates to a vibration simulation analysis method of an automobile driving axle. Background technique [0002] At present, there are relatively mature methods and solutions for the test and detection of transmission systems such as drive axles, involving vibration, noise, fatigue and transmission errors. The equipment and instruments used in the test, test conditions, connection methods, and key data are analyzed and introduced. Invention patent 201710370259.9 invented a drive axle noise test system, introduced the equipment used to build the test system, the distribution of test points, and the test conditions used. The semi-anechoic chamber was used as the test environment to ensure the accuracy of the noise test results. The invention patent takes the actual common vehicle speed as the working condition, converts it into the speed data of the input end of t...

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Problems solved by technology

[0009] Although the general finite element simulation method can model the entire system, it has a large amount of data and a long pre-processing cycle, and it has a relatively large impact on the simulation results of the geometric shape, setting parameters, and processing technology of key parts such as gears and bearings in the transmission system. Large parameters can be changed to optimize the space is very limited

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