機械系の振動現象学習用教材の開発

－３自由度ねじり振動系－

抄録

In learning the issue of vibration, it is important to know the essence of the various problems in resonance, natural frequency, natural vibration mode, and so on. However, it is really very hard to understand these phenomena. So, we started to develop the experimental equipment for the purpose of observing the vibration of mechanical systems, especially paying attention to resonance and natural vibration mode. In this study, an experimental equipment of torsional vibration system with three degrees of freedom was developed. By using this apparatus, we clearly observed the primary, secondary and tertiary resonances and natural vibration modes. The torsional vibration device using two springs was very effective to understand the difference in natural vibration modes. Furthermore, in order to verify the validity of this vibration system was simulated by using a software called DSS. The original motion pictures are open to the public on the Internet.