中文摘要：

基于一维振动理论，采用有限元法分析了超声喷嘴的振动模态与谐响应，在此基础上，设计了一种实现三次雾化的超声喷嘴。最后对超声喷嘴的雾化效果进行了理论计算分析与试验验证，结果表明，该装置理论雾化粒径约为14．45μm，与实际雾化粒径17．52μm基本吻合。与同频率一级雾化超声喷嘴的雾化粒径30．53μm相比，该装置有效缩小了雾化粒径，改善了雾化质量。

英文摘要：

Based on the one-dimensional acoustic propagation theory in elastic media, The paper analyzes the vibration modal and harmonic response of ultrasonic nozzle model with the finite element method, On the basis, the ultrasonic nozzle with required frequency was designed. Finally, the theoretical analysis and experimental verificationwas done. The experimental result shows that the theoretical atomized particle sizel4.45 microns is basically identical with the actual atomized particle sizel7.52 microns, the device could effectively reduce the atomized particle size and improve the atomization quality much more compared with the theoretical atomized particle size30.53 microns of equal frequency single ultrasonic nozzle.