道床砕石中を伝播する衝撃力について

概要

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Generally speaking, in proceeding the investigation on the behavior of track ballast excited by the impact loaded motion, there exist two ways of approach; one is the way using the theory of vibration and the other is that based on the theory of wave propagation. The former which treats the object as a whole mass is efficient to know and analyzes the response behavior of the mass, and the latter is suitable for analyzing phenomena generating at any point in the track ballast. In this study, the authors are so interested in the behavior of track ballast excited by the impact loaded motion and wish to know what phenomena will occur at any point in the track ballast during the impact disturbance, that the analyzing method by the wave propagation theory will be used mainly in proceeding the study. We regard the impact loaded motion as a pulsative disturbance which acts in very short time rather than as a periodic dynamic one which continues for fairly long time, and there clarify the characteristics of the stress wave propagating through track ballast when it is excited by such a shock disturbance. In performing the theoretical analysis many adequate assumptions are used in order to make the mathematical treatment possible, and they are explained in detail when they appear.
岐阜工業高等専門学校の論文