玻璃振动模压中变幅杆高温模态分析及实验研究

High temperature modal analysis and experimental study of the ultrasonic horn for glass vibration molding

为研究应用于光学元件的超声振动模压中变幅杆的高温振动特性,基于纵振波动方程设计所需频率的超声变幅杆,利用Creo软件建立其参数化模型。考虑变幅杆高温下的材料特性变化,结合实验所得数据对高温下的变幅杆进行模态分析,得到其在高温下的谐振频率。分析研究表明,变幅杆谐振频率随着温度的升高而降低。为提升变幅杆高温的下频率稳定性,通过有限元软件对其进行了结构优化设计。按照优化后的尺寸加工出变幅杆,通过实验检测其谐振频率,结果表明,在高温下优化后变幅杆的谐振频率仍稳定在设定频率附近。

In order to understand the vibration characteristics of the ultrasonic horn for glass vibration molding at high temperature, a horn with a required frequency is designed based on longitudinal vibration theory, and a parameterized model of the horn is established with Creo2.0 software. Considering the material properties change of the horn at high temperature, the corresponding modal analysis is made, the resonance frequency of the horn is obtained by simulation analysis and the resonance frequency decreases with increasing temperature. In order to improve the frequency stability of the horn at high temperature, structural optimization design is carried out by finite element software. The horn is manufactured according to the optimized size, and the resonance frequency is tested by experiment. The experimental results indicate that the resonance frequency of the horn remains stable near the set frequency at high temperature.