鉄道車両の振動低減に関する研究 : 車体一次曲げ固有振動数に関する考察

概要

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In this paper, we will propose a technique to find out the appropriate value of natural frequency of railway car-body first-bending mode, from the results of calculated power spectral density (PSD) of vertical acceleration 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 and so it has large effect on comfortability in riding. We Proposed a new estimation model that can consider not only vibration of several speeds, but also changes in weight of the passengers. From classify results of several calculations, we find two approaches. One is a conventional approach (method. 1) to get higher natural frequency by raises flexural rigidity. And another, new approach (method. 2) proposed us is to permit a resonance with a frequency of vibrated same phase at supported points of front and rear bogie, at lower frequency. Even if we permit a resonance at these frequencies, vibration amplitude will be smaller than the amplitude occurred in the method 1. The advantage of Method. 2 is that we can expect easily design and product railway car-body more lightly.
一般社団法人日本機械学会の論文
1999-02-25