Method and device for analyzing abnormal noise of automobile

Abstract

The disclosure relates to a method and device for analyzing abnormal noise of automobiles, and belongs to the technical field of automobiles. The method includes: creating a target three-dimensional model of a component; determining a first target area and a second target area, determining a first reference line in the first target area, and determining a second reference line in the second target area; Select a plurality of collision node pairs in the first target area, and select a plurality of friction node pairs in the second target area; under the condition of the vibration of the preset frequency, output two nodes in each collision node pair perpendicular to the first reference The distance in the direction of the line, the collision relationship graph changing with time within the preset time period, the distance between two nodes in each friction node pair in the direction parallel to the second baseline, and the distance in the preset time period with The time-varying friction relationship diagram; determine the location where the abnormal noise of the collision is likely to occur, and determine the location where the abnormal noise of the friction is likely to occur. By adopting the present disclosure, the accuracy of technicians in predicting the location of abnormal sound can be improved.

Description

technical field [0001] The disclosure relates to the technical field of automobiles, in particular to a method and device for analyzing abnormal noises of automobiles. Background technique [0002] NVH (Noise, Vibration, Harshness, noise, vibration and harshness) characteristics is a comprehensive issue to measure the quality of automobile manufacturing, and it is one of the issues that major vehicle manufacturers and parts companies in the international automobile industry are concerned about. [0003] Abnormal noise is an important factor affecting NVH characteristics, usually including abnormal collision noise and friction abnormal noise. At present, most of the analysis methods for abnormal noise in China are to use modal analysis technology to optimize the processing of automobile abnormal noise. Specifically, firstly, three-dimensional modeling is carried out on the parts of the car, and then the modal analysis is carried out on the areas prone to abnormal noise in the...

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Problems solved by technology

[0005] In the prior art, it is not possible to determine the specific location of the abnormal sound in the component by using the modal results to check the modal condition of the component. In this way, when improving the component, it can only be determined by the experience of technicians. The location where abnormal noise is likely to appear in this component, the accuracy of predicting the location of abnormal noise by using experience is poor

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