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Method and device for modal test of automobile instrument panel skeleton

A technology of automobile instrument panels and test methods, which is applied in the directions of measuring devices, vibration tests, and machine/structural component tests, etc., which can solve the problems of wasting test time, time-consuming and laborious, and affecting test efficiency, etc., and achieves wide application range and accuracy high precision and accurate connection

Inactive Publication Date: 2017-04-05
TONGJI UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional instrument panel skeleton simulation test devices are basically not built according to the structure of the instrument panel skeleton, which cannot be applied to different types and sizes of instrument panel skeletons.
The traditional modal test device is time-consuming and labor-intensive when installing the instrument panel skeleton, wasting a lot of test time, and the accuracy of the test results is not high, which affects the test efficiency, which cannot meet the requirements for rapid testing of large-scale instrument panel skeletons

Method used

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  • Method and device for modal test of automobile instrument panel skeleton
  • Method and device for modal test of automobile instrument panel skeleton
  • Method and device for modal test of automobile instrument panel skeleton

Examples

Experimental program
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Embodiment 1

[0028] A method for modal testing of an automobile instrument panel skeleton, wherein the automobile instrument panel skeleton is fixed on a detection device, and the automobile instrument panel skeleton includes an instrument panel skeleton beam, a driver's side bracket 26, a passenger side bracket 27, an instrument panel The frame left side bracket 24, the instrument panel frame right side bracket 25 and the instrument panel frame rear side bracket 28 adopt the method of single-point excitation and multi-point vibration pickup, set the excitation point on the instrument panel frame beam, and Set vibration pickup points next to the points, and set vibration pickup points on the driver's side bracket, co-driver's side bracket and the rear side bracket of the instrument panel frame, and perform vibration excitation and vibration pickup in the x, y, and z directions respectively, and determine the analysis bandwidth of 256Hz Below; use PolyMAX to perform modal extraction on the t...

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Abstract

The invention relates to an automobile instrument board framework modal test method and device. An automobile instrument board framework is fixed to a detection device and comprises an instrument board framework beam, a driver side support, a secondary driver side support, a left support of the instrument board framework, a right support of the instrument board framework and a rear support of the instrument board framework. Detection is carried out in a single-point excitation and multi-point vibration picking method, an excitation point is arranged on the instrument board framework beam, a vibration picking point is arranged beside the excitation point, meanwhile, the driver side support, the secondary driver side support and the rear support are provided with vibration picking points, excitation and vibration picking are carried out in the x direction, the y direction and the z direction, an analysis bandwidth is below 256Hz, and modality extraction is carried out on transmission functions below 256 Hz by means of PolyMAX. Compared with the prior art, the modal test device has the advantages of being high in installation speed, accurate in positioning, easy to operate and the like and can greatly improve test efficiency.

Description

technical field [0001] The invention relates to a modal test device and method, in particular to a modal test method and device for an automobile instrument panel skeleton. Background technique [0002] At present, in the field of automobile development and testing, the modal test of the automobile dashboard skeleton is used to determine the vibration frequency and mode shape of each order of the automobile dashboard skeleton in the working state, so as to test the design of the automobile dashboard skeleton. However, the traditional instrument panel skeleton simulation test devices are basically not built according to the structure of the instrument panel skeleton, which cannot be applied to different types and sizes of instrument panel skeletons. The traditional modal test device is time-consuming and labor-intensive when installing the instrument panel skeleton, wasting a lot of test time, and the accuracy of the test results is not high, which affects the test efficiency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
Inventor 周鋐刘浩吴亚波范昊天
Owner TONGJI UNIV
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