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Tire noise horn amplifying effect predicting method

A prediction method and speaker technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as poor results, time-consuming calculation, inaccurate prediction of maximum and minimum positions, and a simple method to achieve , the effect of high efficiency

Active Publication Date: 2017-05-31
HEFEI UNIV OF TECH
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Problems solved by technology

However, these methods have some defects when predicting the amplification effect of the tire noise horn. The model is only suitable for the prediction of the high frequency part, and the effect is not good in the low frequency part; the boundary element method can accurately predict the tire noise horn amplification effect, but the calculation efficiency of the boundary element method is low, and it takes a lot of calculation time

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  • Tire noise horn amplifying effect predicting method

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Embodiment Construction

[0046] The prediction method of tire noise horn amplification effect in the present embodiment is to carry out as follows:

[0047] Step 1, such as figure 1As shown, the tire is simplified as a rigid cylinder, the cylinder is placed on the rigid ground, and the measurement points are arranged in the horn-shaped area formed by the arc surface of the cylinder and the ground. In the specific implementation, the microphone used for measurement is embedded in the ground, and the microphone The surface of the probe coincides with the ground, and a point source S is placed at a certain distance from the cylinder above the ground as the sound source. In the specific implementation, a small speaker is used as the sound source.

[0048] Step 2. Evenly place N nodes on the surface of the cylinder. The sound pressure on the surface of the cylinder is represented by the sound pressure at the N nodes. Arrange N equivalent sources inside the cylinder. The surface where the equivalent source ...

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Abstract

The invention discloses a tire noise horn amplifying effect predicting method. The tire noise horn amplifying effect predicting method is characterized by including simplifying a tire as a rigid cylinder, disposing the cylinder on a rigid ground, and disposing a point source on a point in a space, with a specific distance away from the cylinder, above the ground as a sound source; arranging an equivalent source in the cylinder, and establishing a transfer relation between the equivalent source strength and sound pressure of a sound field according to a boundary condition that the surface vibration velocity of the rigid cylinder equals to zero; acquiring cylinder surface sound pressure according to sound radiation rules of the point source, and computing the equivalent source strength by combining the cylinder surface sound pressure with the transfer relation between the equivalent source strength and the sound pressure; computing sound pressure at a measurement point of the equivalent source strength; acquiring the sound pressure of the measurement point without the cylinder according to the sound radiation rules of the point source, and combining the sound pressure at the measurement point with the cylinder to obtain a tire noise horn amplifying effect value. The tire noise horn amplifying effect predicting method is capable of predicting tire noise horn amplifying effect efficiently and accurately.

Description

technical field [0001] The invention relates to a method for predicting acoustic radiation in the field of noise in the specialty of physics, more specifically a method for simplifying an actual tire model and predicting the horn amplification effect of tire noise. Background technique [0002] The horn amplification effect of tire noise is an important mechanism of tire noise generation. When the car is running, the tire tread and the road surface form a horn-shaped structure, and the noise generated by the contact between the tire and the road surface will be amplified by this structure. This amplification process is called the horn amplification effect. How to accurately predict the horn amplification effect of tire noise has important guiding significance for tire noise control. At present, there are mainly experimental methods and numerical methods to predict the horn amplification effect of tire noise. The experimental method can accurately obtain the horn amplificat...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/10Y02T90/00
Inventor 张永斌高煜毕传兴马钢张洋
Owner HEFEI UNIV OF TECH
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