نوع مقاله : مقاله پژوهشی
موضوعات
عنوان مقاله English
نویسندگان English
The effects of noise and vibration have become one of the problems of citizens living in metropolitan cities in recent years. Although noise and vibration in cities originate from many sources, but where the source is permanent, the adverse effects is much greated the transient sources. The urban rail transportation system is a permanent source of noise and vibration in cities, in which appropriate measures must be taken to eliminate its effects. Despite the importance of this issue, complaints from people on the currently operating metro lines shows that not enough studies have been conducted in this area.The present study aims to investigate and evaluate the effects of noise and vibration from metro lines based on a set of measurements. Accordingly, the values of vibration and noise were recorded and evaluated as examples in two problematic sections in the Tehran metro. The study shows that there is a great correlation between rail surface defects and track vibrations. The correlation values are much higher in the curved sections compared with straight parts of the track. Considering variou curve radious, the correlation values in the curves with more than 700 meters radious is similar to the straight track sections. Therefore, it can be concluded that applying a curve radius of less than 700 m in metro lines can have a significant impact on vibrations. Accordingly, it is recommended to avoid a curve radius of less than 700 m in the early design stages of the railway project
کلیدواژهها English
