122 直交 2 方向励振による円柱状超音波振動体の検討

概要

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We investigated a method of ultrasonically exciting a solid metal cylinder with a diameter of 50-100 mm and a length of 200-800 mm. When a small area on the side of a metal cylinder with such comparatively large dimensions is ultrasonically excited (with approximately 20 kHz), the metal cylinder vibrates such that transverse vibrating waves are produced in the direction of its length. In this case, the distribution of the vibrations on the cylinder's circumference is greatly displaced in the direction of the excitation, while displacement in directions orthogonal to this is extremely small. Therefore, in order to make the vibratory displacement distribution along the circumference essentially uniform, we tested a method of exciting the side of the metal cylinder simultaneously from two directions orthogonal to each other. This method of excitation is based on the way of thinking in a Lissajous figure. We studied a method of controlling a metal cylinder's vibratory displacement distribution that employs this method of excitation.
一般社団法人日本機械学会の論文
2003-06-04