Feasibility Research on Evaluation of Tire-Pavement Noise by Tire Drop Method in Semi-anechoic Chamber
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更新:2021-12-03 10:27:28 浏览:92次
张贴报告
摘要
Abstract: In the research work related to reducing vehicle tire-pavement noise, many researches are to establish a tire-road coupling simulation model for simulation analysis to calculate tire-road noise.However, the reliability of the simulation model needs to be verified by experiments, and it is difficult to simulate the actual situation in different situations. This research was designed to evaluate a tire-pavement noise test method in a semi-anechoic chamber, and based on the impedance tube test method, fitting the acoustic absorption coefficient measured by the standing wave tube to evaluate the performance of tire-pavement with different mixtures. Three different asphalt mixtures were tested to explore the feasibility of the test method. The result shows: As the void ratio increases, the sound pressure level at each center frequency gradually decreases, which is consistent with the actual traffic noise spectrum map distribution; When the nominal maximum particle size changes, there is no significant difference in sound pressure levels at each center frequency; As the amount of modifier increases, the road noise level continues to decrease, and the noise reduction effect is remarkable compared with the matrix asphalt pavement; Using the gray correlation analysis technique, it is concluded that the modifier dosage and the nominal maximum particle size have a greater influence on the noise performance, and the void ratio effect is second, which is similar to the impedance tube test method. The research results show that the tire-fall noise generation mechanism can be better simulated by the tire drop method in the semi-silence room.
Keywords: Tire-pavement noise; Semi-anechoic; Tire rolling method; Data analysis methods; Sound absorption coefficient
稿件作者
zhihao He
Chang'an University
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