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1 103/2 建築系 姚忠達 教授 期刊論文 發佈 Vertical and pitching resonance of train cars moving over a series of simple beams , [103-2] :Vertical and pitching resonance of train cars moving over a series of simple beams期刊論文Vertical and pitching resonance of train cars moving over a series of simple beamsYang, Y.B.; Yau, J.D.淡江大學建築學系London: Elsevier LtdJournal of Sound and Vibration 337, pp.135–149The 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
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