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|Keywords: ||高速磁浮;軌道樑;列車;動力響應;共振;high speed maglev;guidway;train;dynamic response;natural vibration|
|Issue Date: ||2014-02-25 14:01:54 (UTC+8)|
This paper presents the investigation of dynamic response of a guideway subjected to a maglev train moving with very high speeds. By using modal synthesis technology to establish the guideway-pier model, the equations of motion for the maglev train/guideway coupling system are derived and the dynamic response of the train-guideway system are computed using iterative methods. From the numerical studies of a 24m elevated guideway girder under a high-speed maglev train model of TR08, the results indicate increasing moving speeds may result in an amplified response of the guideway, and the second sub-resonance of the first mode of the guideway would be excited as well once the moving speed reaches around 350km/h. Furthermore, when the moving speed of the malgev train is higher than 400km/h, the response amplitudes of the guideway girder and moving vehicles are both amplified significantly. To avoid possible train-induced resonance of guideway vibration, the first natural frequency of the guideway should be designed to be higher than the characteristic frequency of the maglev vehicle/guideway system, which is equal to the ratio of the designed speed to the carriage length.
|Relation: ||工程力學=Engineering Mechanics 29(12), pp.196-203|
|Appears in Collections:||[建築學系暨研究所] 期刊論文|
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