Abstract
A uniform bar vibrator has simple structure and is used widely for various kinds of resonators and me chanical filters. However, it is difficult to miniaturize it in low frequencies because of its resonant frequency constant a=4. 730. In this paper, the S-type bar vibrator is analyzed by the mechanical equivalent network, and compared with the uniform bar vibrator. As a result, it is found that the S-type bar has several advantages for miniaturization in low frequencies ; (D The resonant frequency of the S-type bar is lower about 90s than that of the uniform bar with the same length, (2) In comparison the area (volume) occupied these vibra tors, the S-type bar is also more profitable than the uniform bar. The resonant frequencies for various dimensions of the S-type bar vibrator are calculated Consequently, the optimally minimized dimensions of the vibrator for low frequencies are derived schemati cally. The vibration modes and the location of nodal points of the vibrator are analyzed, and the structure which allows easy supporting is discussed.
