A method of laying bad roads for interior noise testing and a method for interior noise testing
A technology of vehicle interior noise and testing method, which is applied in the direction of using ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., which can solve the problem of insufficient excitation of low-frequency noise in the vehicle, accelerated testing of vehicle interior noise, and inability to test vehicle noise well Level and other issues, to achieve the effect of improving the test road surface, improving the NVH level, and product performance
Active Publication Date: 2017-11-07
GUANGZHOU AUTOMOBILE GROUP CO LTD
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Problems solved by technology
[0003] At present, except for the performance road, other roads in the major automobile proving grounds are not suitable for automobile noise testing, such as Belgian road, washboard road, and resonance road. The noise level of the vehicle; while the performance track is smooth, suitable for wind noise and acceleration interior noise testing, but does not sufficiently stimulate low-frequency interior noise
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[0032] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
[0033] Please refer to figure 1 As shown, Embodiment 1 of the present invention provides a kind of bad road of vehicle interior noise test, comprises the surface layer 1 that thickness is 120 millimeters, and this surface layer comprises by weight ratio 2: 1 mixing, and particle diameter is respectively 25 millimeters and 20 millimeters. The stone materials 11 and 12 of millimeters are filled with modified asphalt 13 between the stone materials. Specifically, the particle size of the stone 11 is 25 mm, the particle size of the stone 12 is 20 mm, and the weight ratio of the stone 11 to the stone 12 is 2:1.
[0034] The surface layer 1 has a porosity of 8.5% and a construction depth of 10.24 mm. In addition, considering the cost of laying and the convenience of testing, the paving width of the test road in this embodiment is 3 meters, and the laying leng...
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Abstract
The present invention provides a bad road for interior noise testing and its paving method, and a method for testing interior noise, wherein the bad road for interior noise testing includes a surface layer with a thickness of 120 millimeters, and the surface layer includes a surface layer with a weight ratio of 2:1. Proportionally mixed stone materials with particle sizes of 25 mm and 20 mm respectively, and modified asphalt is filled between the stone materials. The invention designs and determines the road surface parameters of bad roads, increases and improves the test road surface, provides a test and evaluation scheme for reducing the noise inside the car by testing the noise inside the car on the bad road, improves the NVH level of the whole vehicle, and makes the product Performance is more competitive.
Description
technical field [0001] The invention relates to the field of automobiles, in particular to a bad road for testing interior noise, a laying method thereof, and a method for testing interior noise. Background technique [0002] The noise inside the car is generally greatly affected by the roughness of the road surface structure. When a car runs at the same speed on a road with different roughness, the noise inside the car and the intelligibility of speech will be different. When the car is running at a medium speed, the noise inside the car usually comes from tires and wind noise. When driving on a rough concrete road, in addition to tire noise and wind noise, there is also low-frequency noise from the road to the vehicle. Most cars have the problem of high low-frequency noise. In order to better study this problem, in the development process of car NVH (Noise, Vibration, Harshness, noise, vibration and comfort), bad road noise test is to test the noise inside the car. One of...
Claims
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IPC IPC(8): E01C7/18G01B17/08
Inventor 陆继宏徐仰汇陈军祥王理周叶志刚
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD