张然, 崔晓娟, 贺西平, 王照伟. 前端开孔的大振幅柱型超声变幅杆[J]. 云南大学学报(自然科学版), 2020, 42(1): 73-80. doi: 10.7540/j.ynu.20190317
引用本文: 张然, 崔晓娟, 贺西平, 王照伟. 前端开孔的大振幅柱型超声变幅杆[J]. 云南大学学报(自然科学版), 2020, 42(1): 73-80. doi: 10.7540/j.ynu.20190317
ZHANG Ran, CUI Xiao-juan, HE Xi-ping, WANG Zhao-wei. Large amplitude cylindrical ultrasonic horn with hole in front[J]. Journal of Yunnan University: Natural Sciences Edition, 2020, 42(1): 73-80. DOI: 10.7540/j.ynu.20190317
Citation: ZHANG Ran, CUI Xiao-juan, HE Xi-ping, WANG Zhao-wei. Large amplitude cylindrical ultrasonic horn with hole in front[J]. Journal of Yunnan University: Natural Sciences Edition, 2020, 42(1): 73-80. DOI: 10.7540/j.ynu.20190317

前端开孔的大振幅柱型超声变幅杆

Large amplitude cylindrical ultrasonic horn with hole in front

  • 摘要: 提出了一种前端开横向矩形通孔的柱型变幅杆. 利用有限元方法计算了谐振频率下振幅放大倍数和输出端面位移分布,研究了孔尺寸对变幅杆谐振频率的影响并优化了孔尺寸,得到最大放大倍数,与传统变幅杆相比放大倍数有大幅提高. 分析了优化前后变幅杆的应力. 将变幅杆与换能器相连接,激光测振仪测试了振动系统的频率、振型、变幅杆的输出端面位移分布及相对于变幅杆输入端的振幅放大倍数,测试结果与有限元计算结果一致. 测试结果还表明激励电压与变幅杆输出端位移具有线性关系.

     

    Abstract: In this paper, a cylindrical horn with a rectangular hole through the front end is proposed. The finite element method is used to calculate the amplification factor and the displacement of the output surface at the resonant frequency, the influence of the size of hole at the resonant frequency of the horn is studied. And the geometry of the hole is optimized to obtain the maximum amplification factor, and the amplification factor is greatly improved compared with the conventional horns. The stress of the horn before and after optimization is analyzed. Connecting the horn with transducer, the frequency, mode shape of the vibration system, displacement distribution of the output surface and amplification factor with respect to the input surface of the horn, were measured by using the laser vibrometer. The experimental results were consistent with the analysis of the finite element calculation results. The test results also show that the excitation voltage has a linear relationship with the output displacement of the horn.

     

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