Experimental test method for sound pressure signal in tire cavity with consideration of vehicle rotation
A test and sound pressure signal technology, which is applied in the direction of automobile tire testing, etc., can solve the problems of less research on the influence of noise in the car and difficulties in low-frequency noise
Active Publication Date: 2019-10-18
BEIHANG UNIV
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Problems solved by technology
[0002] In recent years, the improvement of people's environmental noise requirements has led to a lot of research on the mechanism of tire noise, the transmission outside the car, and the impact and suppression of the external environment, but there are few studies on the noise inside the tire cavity and its impact on the noise inside the car.
The high-frequency components of the noise in the car are easy to absorb and suppress, but the low-frequency noise is more difficult
Method used
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[0035] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.
[0036] The present invention considers the experimental testing method of the sound pressure signal of the tire inner cavity sound pressure signal of automobile rotation, see Figure 5 As shown, it includes the following steps:
[0037] Step 1: Put an acoustic pressure sensor ( figure 1 Middle 12) Fix it on the inner surface of the tire with adhesive tape ( figure 1 11), by drilling a small hole in the tire tread ( figure 1 Middle 13) Output the wire of the sound pressure sensor from the tire, and repair the tire to keep the airtightness and integrity of the tire; figure 1 shown;
[0038] The "tyres" use Linglong brand 185 / 60R15 88H tires;
[0039] The "sound pressure sensor" selects the CHZ-212 sound pressure sensor produced by Dongfang Zhice (Beijing) Technology Co., Ltd., which can withstand 3bar atmospheric pressure;
[0040] Step 2: Instal...
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The invention provides an in-tire sound cavity sound pressure signal testing method taking automobile rotation into account. The method includes steps of 1, drilling a small hole in the tire face of atire, leading out a lead of a sound pressure sensor from the inner surface of the tire via the small hole and repairing the tire so as to fill the small hole tightly; fixing a tire assembly on a tiredurability tester base; 3, performing rotation testing and acquiring in-tire sound cavity sound pressure and the position of the sound pressure sensor in the tire so as to obtain an in-tire sound cavity sound pressure distribution map; 4, changing in-tire air pressure, tire rotation speed and tire load separately and obtaining an in-tire sound cavity sound pressure distribution map in different working conditions. In conclusion, in-tire sound cavity sound pressure signal testing method taking automobile rotation into account is realized and the in-tire sound cavity sound pressure distributionmap is obtained. Through changing the in-tire air pressure, tire rotation speed and tire load separately, the in-tire sound cavity sound pressure distribution map in different working conditions is obtained.
Description
technical field [0001] The invention provides a test method for sound pressure signal of an acoustic cavity in a tire considering automobile rotation, which relates to a test method for sound pressure signal of an acoustic cavity in an automobile tire, and specifically relates to a sound pressure signal of an acoustic cavity in a tire considering automobile rotation The test method belongs to the technical field of automobile vibration and noise control. Background technique [0002] In recent years, the improvement of environmental noise requirements has led to a lot of research on the mechanism of tire noise, the transmission outside the vehicle, and the impact and suppression of the external environment, but there are fewer studies on the noise inside the tire cavity and its impact on the noise inside the vehicle. The high-frequency components of the noise inside the car are easy to absorb and suppress, but the low-frequency noise is more difficult. The interior noise ge...
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IPC IPC(8): G01M17/02
Inventor 胡晓军刘献栋单颖春万晓飞何田
Owner BEIHANG UNIV