The design and finite element analysis for the ultrasonic amplitude transformer bar

Ultrasonic amplitude transformer bar is an important part in the power ultrasonic vibration systems. With an application example, a half-wavelength amplitude transformer bar of conical type is designed by analytical method. The freedom modal analysis on the transformer bar was made with finite element analysis software ANSYS, and the natural frequency of transformer bar was obtained. Finally the transformer bar with attached tool was amended by method of finite element analysis, and the purpose of amendment can make the certain natural frequency equal to the operating frequency of vibration system, so as to make sure that transformer bar can lengthways resonate reliably when it is stimulated.