Method for checking causes of road noise structural sound under uniform speed condition

A technology of working conditions and causes, which is applied in the field of investigation of the causes of road noise and structure-borne noise under uniform-speed conditions, can solve the problems of being unable to objectively determine the frequency characteristics of road noise and structure-borne sound in the vehicle, and achieve narrowing the scope of investigation and improving work efficiency Effect

Active Publication Date: 2019-01-18
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Problems solved by technology

[0009] The purpose of the present invention is to provide a method for troubleshooting the cause of road noise structural noise under constant speed conditions, so as to solve the problem of being unable to objectively determine the frequency characteristics of road noise structure sound in the car and determine the zero of the vibration related to the intensity of road noise structure sound in the car. Components and troubleshooting for determining the vibration transmission path of vehicle interior road noise and structure-borne noise

Method used

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  • Method for checking causes of road noise structural sound under uniform speed condition
  • Method for checking causes of road noise structural sound under uniform speed condition
  • Method for checking causes of road noise structural sound under uniform speed condition

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[0032] The technical solution of the present invention is described in detail below through the examples, and the following examples are only exemplary and can only be used to explain and illustrate the technical solution of the present invention, rather than being interpreted as a limitation to the technical solution of the present invention.

[0033] Static mode in this application refers to testing under static conditions, i.e. static testing; working deformation analysis is dynamic testing; vibration of key parts (also dynamic testing, which can be combined with working deformation analysis) data comparison.

[0034] This application provides a method for troubleshooting the causes of road noise and structural noise under constant speed conditions, such as figure 1 shown, including the following steps:

[0035] 1) On the set road surface, determine the subjectively perceived structural noise of the road noise within the corresponding frequency range, and the setting locati...

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Abstract

The invention relates to a method for checking the causes of road noise structural sound under a uniform speed condition, and provides an idea and a method for checking the causes of road noise structural sound in a vehicle. The scope of checking can be reduced by fast diagnosis of the frequency characteristics of road noise structural sound occurrence, thereby improving the work efficiency compared with checking one by one based on experience. Through a series of testing and analysis work, the transmission path of abnormal vibration can be identified more accurately; the key elements of the transmission path can be locked; and economic and effective rationalization improvement suggestions are given according to the actual situation.

Description

technical field [0001] The invention belongs to the technical field of car bodies and car body accessories, in particular to a method for troubleshooting the causes of road noise and structure-borne noise under constant-velocity working conditions. Background technique [0002] Car NVH (Noise, Vibration and Harshness) performance is a key factor for car comfort. Car products with low vibration and quietness have become the main pursuit of car buyers and the most important indicator of car quality. [0003] Automobile noise vibration has two characteristics. One is related to the speed of the engine and the speed of the car, and the other is that different noise and vibration sources have different frequency ranges. The most prominent speed segment of road noise structure noise is mainly concentrated in the 60-80km / h working condition, and its frequency range is generally 20-500Hz. Subjectively, the structural noise of road noise is mainly manifested as low-frequency roar o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00G01M17/007
CPCG01H17/00G01M17/007
Inventor 金定伟陈乐强周彬彬
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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