Method of determining effect of vehicle body side surrounding cavity barrier block on noise in vehicle

A technology of interior noise and body side wall, which is applied in the field of determination of the impact of body side wall cavity barrier blocks on car interior noise, can solve the problems of long time required for building models, unsuitable for popularization and high construction costs, and achieve Avoid incomplete demolition, convincing analysis results, and less residue effects

Inactive Publication Date: 2017-06-13
TONGJI UNIV
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Problems solved by technology

Most of the existing methods are tested by building a body-in-white model without barrier blocks, and comparing it with the test results of the body with barrier blocks to determine the influence of barrier blocks on the low-frequency vibration characteristics of the body. However, it takes a long time to build the model. At the same time, the construction cost is also high, so it is not suitable for promotion and use

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  • Method of determining effect of vehicle body side surrounding cavity barrier block on noise in vehicle
  • Method of determining effect of vehicle body side surrounding cavity barrier block on noise in vehicle
  • Method of determining effect of vehicle body side surrounding cavity barrier block on noise in vehicle

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Embodiment Construction

[0034] The present invention will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation mode and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0035] Such as figure 1 As shown, this embodiment provides a method for determining the influence of the side wall cavity barrier block of the vehicle body on the noise in the vehicle, including the following steps:

[0036] 1) Carry out the drum test, the drum reverse drag test and the wind tunnel test on the body-in-white equipped with barrier blocks in the cavity of the side wall to obtain the interior noise signals corresponding to the three tests;

[0037] 2) Remove the barrier block in the side cavity of the white body:

[0038] 21) Use a heat gun to heat and remove the blocking block adhered t...

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Abstract

The invention relates to a method for determining the influence of a barrier block in a side wall cavity of a vehicle body on the noise inside the vehicle. test and wind tunnel test, respectively to obtain the noise signals in the car corresponding to the three tests; remove the barrier block in the side wall cavity of the body-in-white; carry out the drum test and drum test under the same conditions on the body-in-white after removing the barrier block. The vehicle interior noise signals corresponding to the three tests were respectively obtained through the back-drag test and the wind tunnel test; comparing the two test results, the effect of the body side wall cavity barrier block on the vehicle interior was determined according to the degree of noise signal drop in the car after the barrier block was removed. the effect of noise. Compared with the prior art, the invention has the advantages of simple operation, cost saving and the like.

Description

Technical field [0001] The invention relates to the field of automobiles, and in particular to a method for determining the influence of a side wall cavity barrier block of a vehicle body on noise in a vehicle. Background technique [0002] At present, there are a large number of closed box reinforced beam structures on the side walls of the car body, thus creating a cavity structure. When the vehicle is driving at high speed, a high-speed airflow field will be generated in the side cavity. When the high-speed airflow rubs against obstacles in the cavity, the cavity sheet metal resonance noise will be generated. At the same time, the high-speed airflow field will affect the noise outside the car (such as engine noise, road surface Noise, etc.) also play a transmission role, so it is necessary to block the transmission path of airborne sound. [0003] One of the measures to solve the above-mentioned problems by the barrier block of the side wall cavity of the vehicle body. The bar...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 张立军孟德建张频捷宋然
Owner TONGJI UNIV
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