Parameter design method for inhibiting resonance noise of tire cavity
A resonance noise and parameter design technology, applied in tire parts, computer-aided design, design optimization/simulation, etc., can solve problems such as no effective method for sound-absorbing materials, influence on suppressing tire cavity noise, and poor selection of flow resistance
Pending Publication Date: 2022-03-22
HEFEI UNIV OF TECH
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Problems solved by technology
[0003] In order to suppress the cavity noise of the tire during driving, attaching sound-absorbing materials inside the tire is an effective means to reduce the resonance of the tire cavity. Among them, the sound-absorbing effect of the sound-absorbing material is used to suppress the noise of the tire cavity; Acoustic materials can affect the dynamic performance of tires
When the size of the sound-absorbing material is too large, it will affect the weight of the wheel and the installation of the material, increasing fuel consumption and cost; poor selection of flow resistance will affect the effect of suppressing tire cavity noise
In the prior art, there is no effective method for how to select the optimal flow resistance and size of sound-absorbing materials
Method used
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[0123] Taking a certain type of 205 / 55R16 tire as an example, build a three-dimensional model and divide the grid, the density of the air is ρ=1.2kg / m 3 , The speed of sound in air c=343m / s. Figure 4 to Figure 8 ,Re(f e ) represents the real part of the complex frequency, Im(f e ) represents the imaginary part of the complex frequency.
[0124] According to the specific implementation method, it can be known that changing the flow resistance σ, thickness C and width L of the annular sound-absorbing material layer 1, the characteristic frequency f of the tire cavity can be plotted e The changing curve: when the thickness C of the annular sound-absorbing material layer 1 is C=0.03m and the width L=0.125m, the flow resistance σ of the annular sound-absorbing material layer 1 is changed from 50Ns / m 4 Gradually increase to 30000Ns / m 4 , tire cavity characteristic frequency f e The curve of the flow resistivity σ of the ring-shaped sound-absorbing material layer 1 is as follow...
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The invention discloses a parameter design method for inhibiting resonance noise of a tire cavity. The method comprises the following steps: enabling a sound absorption material which is used for inhibiting the resonance noise of the tire cavity and is attached to the inner surface of a tire to be equivalent to a fluid which meets a Delana-Bazley-Miki theoretical model; constructing an acoustic model for tire cavity acoustic modal analysis based on a multi-domain boundary element method; the characteristic value of the nonlinear characteristic value problem is solved by using a surrounding channel integral method, and the characteristic frequency of the tire cavity with the sound absorption material attached inside is calculated; and finally representing the tire cavity resonance noise suppression effect based on the tire cavity characteristic frequency imaginary part, thereby designing the optimal flow resistance rate, thickness and width of the porous material for suppressing the tire cavity resonance noise. According to the method, the frequency of the tire cavity with the sound absorption material attached inside can be calculated, and a theoretical basis is provided for selecting sound absorption material parameters for inhibiting resonance noise of the tire cavity.
Description
technical field [0001] The invention is a parameter design method for suppressing tire cavity resonance noise, which provides a basis for the parameter design of attaching sound-absorbing materials inside the tire. Background technique [0002] During the driving process of the car, the uneven road excites the tire surface, and the tire surface vibrates, which in turn causes the air inside the tire to vibrate. When the air vibration reaches the resonance frequency, it will cause the tire cavity to resonate, thus generating a large cavity resonance noise, which is the mechanism of the tire cavity noise; the tire cavity resonance frequency is closely related to the size of the tire cavity, generally in In the range of 150Hz-250Hz, in this frequency range, the noise has a strong penetrating power, slows down, and reaches the human ear bones, causing discomfort such as sympathetic nervous tension, which has an important impact on the driving comfort of the car. [0003] In orde...
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IPC IPC(8): G06F30/23G06F30/15B60C99/00G06F113/08G06F119/10
CPCG06F30/23G06F30/15B60C99/006G06F2113/08G06F2119/10Y02T90/00
Inventor 毕传兴万成郑昌军张永斌
Owner HEFEI UNIV OF TECH