Automobile rolling noise test system and noise test method

Abstract

The invention provides an automobile rolling noise test system and noise test method, and belongs to the field of mechanical vibration and noise measurement. Radiation noise of tires, rolling noise of channels between the tires and a cab and vibration data of the automobile tires are tested in an anechoic chamber under two situations; and if the radiation noise data and the vibration magnitude detected in two times of testing are within a set fluctuation range, rolling noise acquired by two times of measurement is compared, and the difference value of two times of rolling noise is calculated to be the contribution value of all components or partial components of a chassis system to rolling noise. With application of the method, degree of contribution of vibration of the whole or partial components of the chassis system to vibration noise in the automobile can be achieved, separation of structural transfer and air transfer of rolling noise can be realized, and the test method is a comprehensive, direct, rapid and effective test method including common conditions of the automobile. The test system applied by the method is simple in structure and has high universality, and only the position of a chassis body separation device requires to be adjusted according to different automobile models so that cost is low.

Description

technical field [0001] The invention relates to the measurement of mechanical vibration and noise, in particular to an automobile rolling noise test system and a noise test method. Background technique [0002] Rolling noise is one of the main sources of vehicle vibration noise, and rolling noise is mainly transmitted to the car through the chassis system and body system. Therefore, the transmission vibration isolation capability of the chassis system and the body system directly affects the vibration and noise level of the vehicle. At present, the test and analysis of rolling noise is mainly by picking up the vibration and noise signals of related components. Due to the influence of each subsystem on the interior noise, it is impossible to accurately judge the contribution of a single system to the interior noise. Although the transfer path method can test the contribution of the chassis system and the body system to the interior noise, due to the space limitation of the c...

AI Technical Summary

Problems solved by technology

At present, the test and analysis of rolling noise is mainly by picking up the vibration and noise signals of related components. Due to the influence of each subsystem on the noise inside the car, it is impossible to accurately judge the contribution of a single system to the noise inside the car.

Although the transfer path method can test the contribution of the chassis system and the body system to the noise inside the vehicle, due to the limitation of chassis space, it is usually difficult to arrange the hammer or exciter required for the test of this method, which makes the test more difficult

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