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Main contribution structure prediction method for vibration noise of an electric drive axle of a new energy automobile

A new energy vehicle, vibration and noise technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem that it is difficult to obtain accurate time-varying excitation of gear meshing, the numerical solution of drive axle vibration and noise cannot be obtained, and the Accurately describe problems such as changes in time-varying incentives to achieve the effects of improving prediction accuracy, saving prediction time, and reducing experimental costs

Pending Publication Date: 2019-06-11
WUHAN UNIV OF TECH
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Problems solved by technology

In addition, there is a certain gap between this method and the actual working process of the automobile drive axle. It is difficult to obtain accurate time-varying excitation of the gear mesh and cannot accurately describe the time-varying excitation that changes with the rotation of the bearing and is finally transmitted to the casing to cause the casing to vibrate. a process
Therefore, it is impossible to obtain an accurate numerical solution of the vibration and noise of the drive axle, and thus it is impossible to accurately predict the noise and the structural panel with a large contribution

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  • Main contribution structure prediction method for vibration noise of an electric drive axle of a new energy automobile
  • Main contribution structure prediction method for vibration noise of an electric drive axle of a new energy automobile
  • Main contribution structure prediction method for vibration noise of an electric drive axle of a new energy automobile

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[0047] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0048] Such as figure 1As shown, the main contribution structure prediction method of the new energy vehicle electric drive axle vibration noise of the present invention comprises the following steps:

[0049] S1. Establish a multi-body dynamics calculation model of the electric drive axle in combination with engineering practice, such as figure 2 shown.

[0050] ① Use the 3D modeling software ProE to establish a 3D solid model of the electric drive axle, including the first shaft of the reducer gear shaft, the second shaft of the reducer gear shaft, the second shaft gear of the reducer, the outer ring gear of the differential, and the differential housing , differential planetary gear, left and right driving half sh...

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Abstract

The invention relates to a main contribution structure prediction method for vibration noise of an electric drive axle of a new energy automobile, which comprises the following steps: S1, establishinga multi-body dynamics calculation model of the electric drive axle based on a multi-body dynamics method, and calculating an excitation force caused by a gear transmission error and bearing contact;S2, establishing a dynamic finite element model of the electric drive axle based on a finite element dynamic method, and calculating the frequency response of the drive axle under the action of the excitation force calculated in the step S1; And S3, establishing a boundary element model of the electric drive axle noise radiation based on a boundary element theory, and performing numerical calculation on the electric drive axle noise radiation based on the data obtained in the step S2. According to the method, the prediction time of the main noise contribution structure is saved, the experimentcost is reduced, and the accuracy of the important noise contribution structure under the predicted peak frequency is improved.

Description

technical field [0001] The invention relates to the field of advanced design and manufacture of automobiles, and more specifically, relates to a method for predicting the main contribution structure of vibration and noise of electric drive axles of new energy vehicles. Background technique [0002] Noise is a key factor in judging the comfort of modern vehicles, and the vibration and noise of the transmission system are often ignored in internal combustion engine vehicles. In electric vehicles, since there is no engine, the noise of the transmission system is highlighted, becoming the most important noise source affecting the comfort of electric vehicles. Therefore, reducing the vibration and noise of the transmission system can greatly reduce the vibration and noise of the whole vehicle, and the main vibration and noise in new energy vehicles is caused by the drive axle. [0003] At present, the main research idea on the vibration and noise of drive axles is numerical calc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 邓松魏鹏华林韩星会
Owner WUHAN UNIV OF TECH
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