为探讨并建立一种频率、功率等参数可以实时调节的新型超声发生机构，选择熔化极与非熔化极电弧回路，分别施加高频连续交变信号和脉冲敲击式信号，以不同的能量传输方式成功地实现了电弧超声激发。对受激电弧的声发射信号分析表明，从音频到超声频带，电弧声发射与激励频率之间存在着线性响应和非线性响应特征。利用熔池简化模型和振动方程，解释了电弧超声谐振波群的产生机理，预测了谐振频带的可能分布。这些特性对实现功率超声“柔性控制”具有潜在的应用价值。 In order to explore and establish a new type of ultrasonic generator whose frequency, power and other parameters can be adjusted in real time, select the melting pole and non-melting pole arc circuit, apply high frequency continuous alternating signal and pulse percussion signal respectively, and transfer with different energy The successful implementation of the arc ultrasonic excitation. Acoustic emission signal analysis of the stimulated arc shows that there exists a linear response and a non-linear response characteristic between the acoustic emission and the excitation frequency from the audio frequency to the ultrasonic frequency band. Using the simplified model of molten pool and the vibration equation, the mechanism of the formation of the harmonic group of arc ultrasonic is explained and the possible distribution of the resonance frequency band is predicted. These characteristics have potential application value to realize the power flexible “flexible control”.