中文摘要：

提出一种新型复合超声变幅杆,该变幅杆总长为一个波长,由五段组成,其中三段为等截面圆柱杆,两段为变截面圆柱杆。给出了该类复合变幅杆的设计方法,并计算了两个实例。结果表明,和普通使用的半波长复合变幅杆相比,该类复合变幅杆具有在不减少甚至增大辐射面积的情况下放大振幅的特点,这对提高整个超声系统的辐射声功率和辐射效率具有积极意义。此类复合变幅杆特别适合在声化学等超声液体处理领域使用。

英文摘要：

A new type of compound ultrasonic horns, which has one wavelength length, is put forward. This type of compound horns consists of five elements, including three constant cross-sectional cylinders and two varied cross-sectional cylinders. The design method of this type of compound horns is given, and two compound ultrasonic horns are calculated. The results show that this type of compound horns has the advantage over the common half wavelength compound horns in amplifying amplitude without reducing the output surface of horn, and even amplifying amplitude and the output surface together. This advantage is vital to the improvement of the radiation power and the transfer efficiency of the acoustic energy of the ultrasonic system. This type of compound horns is especially fit for ultrasonic liquid processing such as sonochemistry.