抄録
This paper shows a method of reducing the resonant frequency of a transversely vibrating bar and gives a guiding principle of design of a miniature virator with low frequency. The resonant frequency of a vibrator can be reduced without changing the length of the vibrator by means of following two methods; the one is to load mass at the end of a bar whereas another is to cut off a part at the root (clamped end) of the bar. Thus the vibrator can be made smaller in size. As far as design of tunning bar loaded with additional mass is concerned, an analysis of the bar carried out by regarding the additional mass as a concentrated mass has already been reported; whilst, in this paper, the process and the results of examination of the bar in case where the additional mass was considered as distributed are described. In other wards, stepped-cantilevers were used and general analysis was conducted by way of "electro-mechanical analogy". And for providing convenience for design, the several cases of reduction of frequency were calculated, and then a few experiments were conducted with the view of comparing with theoretical values.
