| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 94 === In recently years the tire/road noise research demonstrated when driving speed over 50 km/h the mainly traffic noise is from tire/road noise. According to the previous experience indicate directly reduces the source of traffic noise compared to construct the sound-insulated facility that have more economy as well as maintain the original driving vision landscape. The tire/road noise also can be improved from tire and road respectively; its effect factors are including tire material, quality, structure and tread. In order to solve tire/road noise problem on road aspect using different pavement type, material category and texture to improve it.
General traditional method to measure driving noise mainly measure total noise in roadside that without separate vehicle noise from total noise. The research is discusses driving noise of national expressway, the vehicle speed certainly over 50 km/h. therefore, the noise generated from tire/road. The research application of the sound intensity method to measure tire/road noise and it’s provide benefits to avoid receive noise from engine noise, platoon tube noise, gear box noise and wind noise. Using the sound intensity method to measure tire/road noise is a new concept in Taiwan. We also application of the coast-by method and cruise-by method to measure sole vehicle noise in the roadside and they are comparing with sound intensity method to find out the interrelation. Finally, according to measurement results to bring up a preliminary plan of reduce noise. Besides, the research applies computer simulation software to simulate situation of the mix traffic volume, especially, focus on the influence factors of traffic noise to carry out simulation separately. The simulation results can realize at the different situation decreases result of the noise.
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