@article {Tian:2018:1610-1928:54,
title = "Longitudinally Composite Ultrasonic Solid Conical Horns with Adjustable Vibrational Performance",
journal = "Acta Acustica united with Acustica",
parent_itemid = "infobike://dav/aaua",
publishercode ="dav",
year = "2018",
volume = "104",
number = "1",
publication date ="2018-01-01T00:00:00",
pages = "54-63",
itemtype = "ARTICLE",
issn = "1610-1928",
url = "https://www.ingentaconnect.com/content/dav/aaua/2018/00000104/00000001/art00008",
doi = "doi:10.3813/AAA.919145",
author = "Tian, Hua and Lin, Shuyu and Xu, Jie",
abstract = "Longitudinally composite ultrasonic solid conical horns with adjustable vibrational performance are proposed and studied. Compared with the traditional ultrasonic horn, the composite conical horn presented is characterized by the insertion of piezoelectric material which is connected
to adjustable electric impedance. Based on piezoelectric effect, when the electric impedance is changed, the vibrational performance of the horn can be adjusted. In this research, the effect of the electric impedance, the location and thickness of the piezoelectric material on the resonance
frequency and the longitudinal displacement magnification is studied. It is shown that the displacement magnification of the horn with the PZT material located at the large end of the conical cylinder is larger than that with the PZT material located at the small end. When the electric impedance
is increased, the resonance frequency is increased; the displacement magnification with the PZT material located at the large end is increased; the displacement magnification with the PZT material located at the small end has a minimum value. When the thickness of PZT material located at the
large end is increased, the resonance frequency is decreased; the mechanical displacement magnification is increased. When the thickness of PZT material located at the small end is increased, the resonance frequency is decreased and the mechanical displacement magnification is also decreased.
Based on the theoretical analysis, some composite conical horns are designed and manufactured; the resonance frequency and displacement magnification are measured by Polytec Doppler Laser Scanning vibrometer. It is shown that the theoretical resonance frequency and displacement magnification
are in good agreement with the experimental results. It is concluded that by means of the insertion of the piezoelectric material, the vibrational performance of the horns can be adjusted by changing the electric impedance, the location and thickness of the piezoelectric material. It is expected
that this kind of adjustable ultrasonic horn can be used in traditional and potential ultrasonic technologies where the vibrational performance adjustment is needed.",
}