| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 97 === This article studies two major topics. One investigates the behavior of ground vibrations induced by the train moving on the embankments using field experiments, theoretical formulations, and finite element analyses. The other investigates the vibrations on the trains passing the structures of bridges and embankments. Experiments measured on the vehicle are used to realize the characteristics of vibrations on the trains of THSR (Taiwan High Speed Rail), Taipei MRT, and Taiwan Railway. In the first topic, the train-induced vibrations are large at the dominant frequencies of nV/Lc, even though the track is very rough. For subsonic train speeds, the train-induced ground vibration is extremely small when the track is perfectly smooth, but with a minor track irregularity, the train-induced ground vibration can be significantly increased. However, for supersonic train speeds, the ground vibrations with or without track irregularities are not very different, and the vibration of the first dominant frequency having the longest wavelength is the most obvious wave. In the second topic, the vibrations on the train in the track direction are smaller than those in other two directions. The major vibration frequencies on the train are come from the natural frequencies of trains and bridges. Furthermore, the vibrations on the train from Tainan to Taichung are similar, even through the soil properties between the two locations are very different.
|
|---|
