| Summary: | 碩士 === 國立臺灣海洋大學 === 系統工程暨造船學系 === 98 === The goal of this research is to study the vibration and noise characteristics of high-speed rail systems. Moreover, the vibration of viaduct has been measured and the Finite Element Model was constructed for the viaduct to modeling the vibration and then compare with measurement to determine the validity of the model, and then it can used for the design purpose.
High-speed rail system is the fastest of the land based transportation systems in Taiwain. In this study, the vibration and noise data by environmental monitoring systems has been measured in Sulin, Hsinchu, and Sanwha, which are used to investigate and analyze the dynamic characteristics of the system. Based on the measurement results of the viaduct noise by environmental monitoring systems, it shows that noise indicator Lmax increased as the increase of train speed at a particular direction, and Leq(1hour) is increased due to increase of train pass-bys in an hour. But based on the measurement results of the viaduct vibration by environmental monitoring systems, it shows that vibration decreased not necessarily proportionally to the increase in the distance from track centerline.
For the vibration from viaducts structure analysis, measurement the vibration at Tainan Science Park viaducts section has been carried out, and then compare with those from simulation in order to confirm the frequency characteristic of vibration from the structures. The simulation result shows that ground-borne frequency characteristics at about16Hz、25Hz.
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