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Method for analyzing vibration transfer path of vehicle body

A technology of path analysis and vibration transmission, applied in the field of automobile manufacturing, can solve problems such as difficulties, low efficiency, and complicated implementation process, and achieve the effect of improving efficiency

Active Publication Date: 2020-02-04
SAIC-GM-WULING AUTOMOBILE CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

This method can identify the uncoupled frequency response function through the coupling frequency response function and avoid splitting the system, but it needs to apply artificial excitation during the operation of the working condition, which makes the implementation process complicated and difficult, and the efficiency is low

Method used

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  • Method for analyzing vibration transfer path of vehicle body
  • Method for analyzing vibration transfer path of vehicle body
  • Method for analyzing vibration transfer path of vehicle body

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] A flow chart of a vehicle body vibration transmission path in an embodiment of the present invention is as follows figure 1 As shown, the method includes:

[0018] S101. Establish a transfer path analysis model with the engine as the source, the mount as the path, and the body as the receiver. The mount includes a left mount, a right mount, and a rear mount, and each mount includes an engine side The mounting point is the active end and one body side mounting point is the passive end;

[0019] This step is used to establish the "source-path-recipient" model, that is, the transfer path analysis model. In this embodiment, the engine is used as the source, the mount is used as the path, and the vehicle body is used as the receiver to establish a transfer path analysis model. The suspension in this embodiment includes left suspension, right suspension a...

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Abstract

The invention discloses a method for analyzing a vibration transfer path of a vehicle body. The method comprises the following steps of establishing a transfer path analysis model; measuring working condition response and a transfer function under an idling working condition; predicting the working condition response of a suspension structure after virtual change based on a structural dynamics modification re-analysis technology according to the measured working condition response and the transfer function; calculating the suspension stiffness of the suspension structure before changing according to the obtained working condition response of the suspension structure after virtual change; and calculating the coupling force of a suspension section under the idle working condition according to the suspension stiffness, and further calculating the contribution degree of the transfer path. Through the method disclosed by the invention, the system response of the local structure after the virtual modification is predicted based on the structural dynamics modification re-analysis technology, the direct experimental measurement of the frequency response function and the suspension dynamicstiffness of the vehicle body can be avoided, the analysis efficiency of the transfer path is improved, and a foundation for the analysis of the vibration transfer path of the vehicle body is laid.

Description

technical field [0001] The invention belongs to the technical field of automobile manufacturing, and in particular relates to a vibration transmission path analysis method of a vehicle body based on structural dynamics reanalysis technology. Background technique [0002] Since the "source-path-receptor" model was proposed, transfer path analysis (TPA) has been greatly developed as a method to analyze and deal with vehicle vibration and noise problems. Traditional TPA, as the first proposed TPA, has the advantages of high precision and mature method, but it is time-consuming and labor-intensive due to the need to decouple active components. Although the subsequent development of TPA can shorten the experimental time, it needs to sacrifice the accuracy, and the TPA based on the inverse substructure method is difficult to improve the vibration transmission path analysis process of the vehicle body. [0003] Based on the traditional transfer path analysis method proposed by Ger...

Claims

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Application Information

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IPC IPC(8): G01M7/02G01M17/007
CPCG01M7/02G01M17/007
Inventor 王昆王玉雷李雪平罗德洋倪晓波朱平王增伟
Owner SAIC-GM-WULING AUTOMOBILE CO LTD
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