An experimental device for testing, analyzing and controlling cavity resonance in automobile tires

Abstract

The invention provides an experiment device for testing, analyzing and controlling the cavity resonance inside an automobile tire. The device comprises an arc pipe A, an arc pipe B, an arc pipe C, an arc pipe D, an end cover, a loudspeaker, a sealing gasket, a valve stem, fastening bolts, fastening screws, a power amplifier, an acoustic sensor, a data acquisition instrument and a computer. Flange plates at the two ends of the above arc pipes are fixedly connected by fastening bolts. A flange plate at one end of the end cover is fixedly connected with a flange plate at the end portion of an annular branch pipe of the arc pipe C by fastening bolts. The port of the loudspeaker is fixedly connected with an annular support inside the annular branch pipe of the arc pipe C by fastening bolts. During the test measurement process, small and fine foam particles are added into an annular cavity, and the resonance condition inside the cavity can be directly observed. During the study on the control method for controlling the cavity resonance noises of vehicle wheels, different structures of organic glass pipes are prepared for simulating different sound absorbing structures, wherein sound absorbing materials are distributed on the organic glass pipes. Compared with an actual tire structure, the above device is prepared by organic glass pipes, thus being simple and convenient to manufacture and assemble and low in cost.

Description

technical field [0001] The invention provides an experimental device for testing, analyzing and controlling the resonance of the cavity in the automobile tire, which relates to an experimental device for the resonance of the cavity in the automobile tire, in particular to an experiment for testing and analyzing the resonance noise of the cavity of the automobile tire and the research of the noise control method A device belongs to the technical field of automobiles. Background technique [0002] The noise inside the car directly affects the ride comfort of the car. The noise inside the car mainly comes from the power system, the tire-road system and the noise source excited by the wind; The impact of the tire is gradually obvious; when the tire is rolling on the ground, the contact between the uneven road surface and the uneven tire tread arouses the tread broadband vibration, which excites the cavity sound system composed of the tire and the rim of the wheel to resonate, fo...

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Problems solved by technology

[0003] For the research on the vibration noise of the tire cavity and the mechanism of various noise reduction methods, the sound pressure changes at various positions of the tire cavity can be obtained by using actual tires for measurement, but the application of this method cannot intuitively show the The state of resonance inside the cavity. In the research of noise control methods such as laying out sound-absorbing materials and installing sound-absorbing structures, it is complicated, difficult and costly to install and disassemble various noise control accessories on actual tires.

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