Method and device for analyzing Squeak and Rattle noise

A noise and source technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve the problems of wasting materials, cumbersome and time-consuming processes, and achieve the effect of avoiding wasting materials and reducing the time required.

Active Publication Date: 2012-10-24
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the source of Squeak & Rattle noise can only be obtained through subjective evaluation and objective testing after the automobile prototype is manufactured in the later stage of development and design. The process of obtaining the source of Squeak & Rattle noise is cumbersome and time-consuming, and wastes materials

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  • Method and device for analyzing Squeak and Rattle noise
  • Method and device for analyzing Squeak and Rattle noise
  • Method and device for analyzing Squeak and Rattle noise

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Embodiment 1

[0025] see figure 1 , the embodiment of the present invention provides a method for obtaining the source of Squeak & Rattle noise, including:

[0026] 101: Establish the finite element model of the body in white and the finite element model of the instrument panel assembly.

[0027] 102: Apply the unit dynamic excitation force to the suspension point of the vehicle body on the finite element model of the body-in-white, and obtain the acceleration response of the installation point on the finite element model of the instrument panel assembly.

[0028] 103: According to the acceleration response of the installation point on the finite element model of the instrument panel assembly, determine the source of the Squeak & Rattle noise on the finite element model of the instrument panel assembly.

[0029] Further, when establishing the finite element model of the body-in-white and the finite element model of the instrument panel assembly, it also includes: establishing the steering ...

Embodiment 2

[0035] The embodiment of the present invention finds through a large amount of test results that the Squeak & Rattle noise that the automobile produces is mainly related to the vibration acceleration of the installation point on the IP (Instrument Panel, instrument panel assembly) assembly. Under certain excitation, if the IP assembly If the mounting point has a high vibration acceleration, the mounting point will easily become loose after a period of time, thereby generating Squeak & Rattle noise. According to the above principles, the embodiment of the present invention provides a method for obtaining Squeak & Rattle noise source method, see figure 2 , the method includes:

[0036] 201: Establish the finite element model of the body in white, the finite element model of the IP assembly and the steering wheel model.

[0037] Among them, the IP assembly finite element model is mainly the skeleton model of the instrument panel. And it should be noted that, in order to be mor...

Embodiment 3

[0050] see image 3 , the embodiment of the present invention provides a kind of device that obtains Squeak & Rattle noise source, and this device comprises:

[0051] The model building module 301 is used for building the finite element model of the body-in-white and the finite element model of the instrument panel assembly.

[0052] The acceleration response acquisition module 302 is used to apply the unit dynamic excitation force to the vehicle body suspension points on the body-in-white finite element model after the model building module 301 establishes the finite element model of the body-in-white and the finite element model of the instrument panel assembly to obtain the instrument Acceleration response of mounting points on a plate assembly finite element model.

[0053] Squeak & Rattle noise source acquisition module 303, for obtaining the acceleration response of the installation point on the instrument panel assembly finite element model after the acceleration respo...

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Abstract

The invention discloses a method and a device for obtaining Squeak and Rattle noise source, and belongs to the field of automobile noise analysis. The method comprises the following steps that: a body-in-white finite element model and a dashboard assembly finite element model are set up; the unit dynamic excitation force is acted on vehicle body suspension points on the body-in-white finite element model to obtain the acceleration response of installation points on the dashboard assembly finite element model; and the source of the Squeak and Rattle noise on the dashboard assembly finite element model is determined according to the acceleration response of the installation points on the dashboard assembly finite element model. The device comprises a modeling module, an acceleration response obtaining module and a Squeak and Rattle noise source obtaining module. The unit dynamic excitation force is acted on the vehicle body suspension points on the body-in-white finite element model to obtain the acceleration response of the installation points on the dashboard assembly finite element model, and the source of the Squeak and Rattle noise on the dashboard assembly finite element model is determined according to the acceleration response of the installation points on the dashboard assembly finite element model, thereby simplifying the process of obtaining the source of the Squeak and Rattle noise.

Description

technical field [0001] The invention relates to the field of automobile noise analysis, in particular to a method and device for obtaining the source of Squeak & Rattle noise. Background technique [0002] Squeak & Rattle noise is the squeak sound generated by contact sliding, friction of the surface of an object, or the click sound generated by the impact between adjacent parts. Squeak & Rattle noise is an important part of automotive NVH (Noise-Vibration-Harshness) problems, and Squeak & Rattle noise can affect customers' evaluation of vehicle NVH performance. Therefore, how to analyze the source of the Squeak & Rattle noise of the car in advance, so as to improve the source of the Squeak & Rattle noise of the car and reduce the Squeak & Rattle noise is a hot spot of current research. [0003] In the prior art, the source of Squeak & Rattle noise is generally obtained through subjective evaluation and objective test after the automobile prototype is produced in the later ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCY02T90/00
Inventor 李畅田冠男杨晋
Owner CHERY AUTOMOBILE CO LTD
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