【摘要】 为了设计小孔超声振动挤压加工用变幅杆,提出了一种复合型变幅杆的优化设计方法。采用多项式响应面法、克里金法和支持向量回归法构建了根据变幅杆的结构参数预测其性能参数的代理模型,评价了代理模型的精度。结合精度较高的代理模型,基于遗传算法对该复合型变幅杆进行了优化设计。经仿真实验验证了该优化方法的有效性。加工试验结果表明:所设计的变幅杆满足使用要求,加工效果理想。更多还原

【Abstract】 In order to design a horn for small hole extrusion machining with ultrasonic vibration,an optimization method of composite horn was proposed. Three surrogate models,Polynomial Response Surface,Kriging and Support Vector Regression,were employed to predict the performance parameters of the horn according to its dimension parameters. The accuracy of the surrogate models were compared. Based on genetic algorithm and the model with the higher accuracy,the optimization of the composite horn was investigated. The simulation results confirm the validity of the optimization method. The experimental results show that the horn meets the requirements of use and the machining effect is ideal.更多还原