关键词: 贝塞尔超声变幅杆, 多目标优化, 遗传算法, 蜂窝复合材料

Abstract: In order to design high performance ultrasonic horn that was used to manufacture honeycomb composite material, a new approach was put forward to design ultrasonic horn based on multi-objective genetic algorithm. By using structural parameters of the ultrasonic horn as design variables, the resonant frequency and amplification factor as optimization goals, an optimization mathematical model of the Bezier ultrasonic horn was established. To get the parameters for calculating fitness function, a finite model and dynamics analysis of ultrasonic horn were carried out by calling ANSYS software from genetic algorithms, and the Pareto-optimal solution set was obtained by genetic algorithm, then, the most suitable parameters of ultrasonic horn were chosen for horn design. At last, the performance test of ultrasonic horn and trial cut experiment of honeycomb composite material show that amplification factor of optimized ultrasonic horn is as 7.66, it is 29 percent higher, and the working frequency is closer to design frequency than un-optimized ultrasonic horn. Simulation and experimental results confirm the reliability and validity of the proposed design method.

Key words: Bezier ultrasonic horn, multi-objective optimization, genetic algorithm, honeycomb composite material