Abstract
Free vibrations of two typical stepped solid horns are analyzed two-dimensionally and axisymmetrically by means of the finite element method. The result analyzed shows clearly the influence of a stepped shape on vibrational properties of the horn, and shows the fact that a vibration node does not exist on surface of the horn. Then, a problem arisen is how to find out an optimum support position of the horn and an optimum geometry of a supporting flange. The problem is investigated experimentally. A vibration system consisting of a vibrator, horn and supporing flange is constructed, and its mechanical and electrical characteristics are measured. From the results measured, the optimum conditions for the supporting flange for the horn are examined, and a design procedure of the supporting flange is obtained.
