軌道樑在磁浮列車以共振速度通過時動力響應分析

淡江大學機構典藏 > 工學院 > 建築學系暨研究所 > 期刊論文 > Item 987654321/96105

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Title:	軌道樑在磁浮列車以共振速度通過時動力響應分析
Authors:	時瑾;姚忠達;王英杰
Contributors:	淡江大學建築學系
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
Date:	2012-12
Issue Date:	2014-02-25 14:01:54 (UTC+8)
Publisher:	北京市：中國力學學會
Abstract:	該文研究了高速磁浮列車運行引起的軌道梁動力響應問題。采用模態綜合技術建立了梁墩體系模型,推導了高速磁浮列車軌道梁運動方程,運用迭代技術求解了列車軌道梁系統動力學方程,計算分析了高速磁浮列車通過24m簡支軌道梁引起的動力響應,結果表明:隨著運行速度提高,軌道梁動力響應相應提高,在350km/h左右存在一階二次諧波共振;當列車運行速度超過400km/h時,軌道梁和列車動力響應將被顯著放大,為避免軌道梁出現一階一次共振現象,在設計上,應使軌道梁的一階自振頻率遠高于磁浮列車與軌道梁的特征頻率(即設計速度與車長比值)。 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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