Recognition method of air radiation sound attenuation characteristics of howling from car floor to rear axle

A technology of attenuation characteristics and identification methods, which is applied in the testing of vehicles, the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, and the testing of machine/structural components. Accurate and reliable results, strong repeatability and operability, purposeful effects

Active Publication Date: 2020-11-27
JIANGLING MOTORS
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Problems solved by technology

[0007] For this reason, an embodiment of the present invention proposes a method for identifying the sound attenuation characteristics of air radiation from the car floor to the rear axle howling, to solve the problem that the prior art cannot accurately reflect the sound attenuation characteristics of the body floor

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  • Recognition method of air radiation sound attenuation characteristics of howling from car floor to rear axle
  • Recognition method of air radiation sound attenuation characteristics of howling from car floor to rear axle
  • Recognition method of air radiation sound attenuation characteristics of howling from car floor to rear axle

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Embodiment Construction

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] see figure 1 , the method for identifying the air radiation sound attenuation characteristics of the car floor to the rear axle howling air radiation sound attenuation proposed by an embodiment of the present invention comprises the following steps:

[0047] S101, parking the car to be tested in the anechoic chamber;

[0048] Wherein, ...

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Abstract

The invention discloses a method for identifying the air radiation sound attenuation characteristics of howling air radiation from the floor of the automobile to the rear axle, comprising: parking the automobile to be tested in an anechoic chamber; One microphone is arranged at the position of the outer ear of the passenger on the left side of the rear row, and the outer ear of the passenger on the right side of the rear row; several microphones are arranged in the passage of the outer floor of the car; source, to simulate the howling of the rear axle; the sound response of each microphone is collected through the data acquisition equipment; according to the data collected by the data acquisition equipment, the sound attenuation characteristic curve is calculated. The invention focuses on reflecting the sound absorption and insulation characteristics of the body floor, can accurately obtain the sound attenuation characteristic curve of the body floor, and has strong practical significance for the main engine factory to improve the vehicle NVH.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method for identifying air radiation sound attenuation characteristics of howling air radiation from an automobile floor to a rear axle. Background technique [0002] The rear drive axle, referred to as the rear axle, its main function is to reduce the speed of the power transmission system, increase the torque, load, differential speed, etc. The rear axle is mainly composed of housing, reducer gear, differential, half shaft and so on. The rear axle reducer is a pair of gear pairs. In the process of gear transmission, there will be a certain deviation between the actual position of the gear and the ideal position, which is called the transmission error. The relative movement and transmission error between the gears will further generate meshing force, resulting in an annoying noise, which is usually called rear axle squeal. [0003] The rear axle howling mainly occurs und...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/11G01M17/007
CPCG01M17/007G01N29/11
Inventor 马彬彬陈清爽钟秤平段龙杨陈君杰
Owner JIANGLING MOTORS
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