基于ANSYS workbench多目标驱动优化模块对两级阶梯形变幅杆进行优化设计。基于解析法设计两级阶梯形变幅杆，建立参数化变幅杆模型；在静力学分析基础上对变幅杆进行模态、谐响应分析。通过52个设计点仿真分析获得谐振频率、放大系数、最大应力与变幅杆结构尺寸关系，并优化变幅杆尺寸。研究表明，变幅杆谐振频率小于理论设计频率，振幅放大系数小于理论值，超声能量损耗较大。优化所得变幅杆的谐振频率接近理论设计频率，提高放大系数。为大功率、大振幅的超声变幅杆优化设计提供新的设计、优化思路。
Abstract
The two-section ultrasonic stepped horn was designed and optimized using multi-goal driven optimization method based on ANSYS workbench. Based on analytical method, two-section ultrasonic stepped horn was designed and the parameterized model of the horn was established. In addition, the amplifying rate and resonant frequency of the horn was obtained using static analysis, modal analysis and harmonic response analysis. Fifty-two design points was simulated, and the relationship between vibration parameters and the sizes of the horn was established. Moreover, the sizes of the ultrasonic horn was optimized using multi-goal driven optimization method. The results showed that the real resonant frequency is lower than theoretical design frequency and the amplifying rate of the horn is decreased. Through optimization, the deviation between resonant frequency and theoretical design frequency was reduced, and amplifying rate was improved. This paper provide a new optimal design method of ultrasonic horn in high-power ultrasonic machining.
关键词
阶梯形变幅杆 /
多目标驱动优化 /
放大系数 /
谐振频率 /
超声加工
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Key words
two-section ultrasonic stepped horn /
multi-goal driven optimization /
amplifying rate /
resonant frequency /
ultrasonic machining
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