逆踏面勾配車輪を有する独立回転輪軸の走行安定性に関する研究(機械力学,計測,自動制御)

概要

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In this investigation, hunting stability of an independently rotating wheelset (IRW) with inverted tread conicity is discussed. To this end, equations of motion of IRW with inverted tread conicity are derived and used for the stability analysis. It is demonstrated that unstable hunting motion occurs in this type of wheelset and the hunting frequency decreases as the speed increases, which is totally different characteristics from those of the conventional wheelset. The cause of such unique vibration characteristics is investigated from an energy point of view, and the effect of coupling terms associated with the wheel/rail creep forces on the stability of the hunting motion is discussed using the equations of motion in a block diagram form. Furthermore, it is presented that the hunting motion can be stabilized by adequate choices of primary suspensions and the absolute stability condition is theoretically derived for a single suspended IRW with inverted tread conicity.
2010-11-25