鉄道車両の振動低減に関する研究 : 車両間減衰要素による車体一次曲げ振動の制振効果

概要

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In this paper, we will show the effect of vibration reduction of first-bending mode of railway car body by using coupling damper, from the results of calculated riding quality level and vertical acceleration peak for shinkansen vehicle. It is important to decrease this vibration because the natural frequency generally exists in the range that human feel it so sensitive that it has large effect on comfortability in riding. In this study, we make a train set model composed of five single car FEM models and coupling model, that is a linear spring and damper element connected parallel. From the resuits of calculation at several damping values, we find that this noticed vibration is decreased at all considered speeds (240, 275, 300, 320 km/h) but decreasing level is different at each speed. From investigation of vibration shape at natural frequency of noticed vibration (9.0 Hz), we make clear that difference of vibrated phase among each car make this phenomenon. On running 275 km/h, vibration level is too high, and vibration-reduction effect is small, because each car vibrates with same phase, as a result, relative velocity between each car is not effectively generated at each coupling damper.
一般社団法人日本機械学会の論文
1999-09-25