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Method for determining vibration influence of body-side cavity stop block on vehicular low-frequency structure

A technology for body side walls and structural vibration, applied in the automotive field, can solve the problems of unsuitability for popularization, long time required for building models, and high construction costs, and achieve the effects of avoiding incomplete demolition, good demolition effect and less residue.

Inactive Publication Date: 2017-06-13
TONGJI UNIV
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  • Abstract
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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 for determining vibration influence of body-side cavity stop block on vehicular low-frequency structure
  • Method for determining vibration influence of body-side cavity stop block on vehicular low-frequency structure
  • Method for determining vibration influence of body-side cavity stop block on vehicular low-frequency structure

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0030] like figure 1 As shown, this embodiment provides a method for determining the influence of the body side wall cavity barrier block on the low-frequency structural vibration of the vehicle, including the following steps:

[0031] 1) Carry out modal test and transfer function test on the body-in-white equipped with barrier blocks in the side wall cavity;

[0032] 2) Remove the barrier block in the side wall cavity of the body in white:

[0033] 21) Heat and remove the barrier block adhered to the side wall cavity with a heat gun;

[0034] 22) Determine whether the removal of t...

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Abstract

The invention relates to a method for determining the vibration influence of a body-side cavity stop block on a vehicular low-frequency structure. The method comprises the following steps that a modal test and a transfer function test are conducted on a white vehicle body provided with the stop block in a body-side cavity; the stop block of the white vehicle body in the body-side cavity is dismounted; the modal test and the transfer function test under the same conditions are conducted on the white vehicle body provided with no stop block; results of two times of tests are compared, and the vibration influence of the body-side cavity stop block on the vehicular low-frequency structure is determined. Compared with the prior art, the method has the advantages of being simple in operation, saving the cost and the like.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a method for determining the influence of a body side wall cavity barrier block on vehicle low-frequency structural vibration. Background technique [0002] The body side wall cavity barrier block is one of the measures for passive noise reduction of automobiles. The barrier block uses light, environmentally friendly and high-efficiency foaming material that adopts high-temperature foaming, and uses PA66 nylon material as the support plate, so that it has the advantages of light weight and good sealing effect. The barrier block is installed in the side wall cavity of the body before the body-in-white is welded, and is heated and foamed during the baking process of the electrophoresis of the body to block the side wall cavity. These materials not only prevent noise from intruding into the passenger compartment, but also improve the stiffness and damping of the body structure, thereby s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G01M7/02
CPCG01M7/02G01M17/007
Inventor 张立军孟德建张频捷宋然
Owner TONGJI UNIV
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