中文摘要：

在纵振型变幅杆等效电路的基础上,研究了三类负载超声变幅杆的共振频率与放大系数.得到了阻性负载时,变幅杆频率方程与放大系数的计算式;分别绘制了共振频率及放大系数随负载变化的曲线图,并给出了分析.这将有助于超声变幅杆的研究和设计.

英文摘要：

Based on mechanic equivalent circuit of the longitudinal ultrasonic horn, the resonance frequency and the amplitude magnification coefficient of three kinds of loaded horns are studied. The resonant frequency equation and the amplitude magnification coefficient, with resistance load, are calculated; then, the graphs of resonance frequency and the amplitude magnification coefficient, following the change of loads, are charted, and some analyses are given. The results may be useful to the research and design of ultrasonic horn.