Vertical and pitching resonance of train cars moving over a series of simple beams

doi:10.1016/j.jsv.2014.10.024

淡江大學機構典藏 > 工學院 > 建築學系暨研究所 > 期刊論文 > Item 987654321/100179

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题名:	Vertical and pitching resonance of train cars moving over a series of simple beams
作者:	Yang, Y.B.;Yau, J.D.
贡献者:	淡江大學建築學系
日期:	2015-02-17
上传时间:	2015-02-05 10:04:19 (UTC+8)
出版者:	London: Elsevier Ltd
摘要:	The resonant response, including both vertical and pitching motions, of an undamped sprung mass unit moving over a series of simple beams is studied by a semi-analytical approach. For a sprung mass that is very small compared with the beam, we first simplify the sprung mass as a constant moving force and obtain the response of the beam in closed form. With this, we then solve for the response of the sprung mass passing over a series of simple beams, and validate the solution by an independent finite element analysis. To evaluate the pitching resonance, we consider the cases of a two-axle model and a coach model traveling over rough rails supported by a series of simple beams. The resonance of a train car is characterized by the fact that its response continues to build up, as it travels over more and more beams. For train cars with long axle intervals, the vertical acceleration induced by pitching resonance dominates the peak response of the train traveling over a series of simple beams. The present semi-analytical study allows us to grasp the key parameters involved in the primary/sub-resonant responses. Other phenomena of resonance are also discussed in the exemplar study.
關聯:	Journal of Sound and Vibration 337, pp.135–149
DOI:	10.1016/j.jsv.2014.10.024
显示于类别:	[建築學系暨研究所] 期刊論文

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