阶梯形变幅杆的放大性能-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

专题研究

阶梯形变幅杆的放大性能

汪彦军，贺西平*，张频

(陕西省物理研究所，陕西西安 710062)

汪彦军，男，硕士研究生，研究方向为超声工程．

摘要:

从变截面杆波动方程出发，研究了半波长阶梯形变幅杆放大系数与几何尺寸及组成材料之间的关系．结果表明，半波长阶梯形变幅杆放大系数不仅与组成阶梯形变幅杆两段均匀杆的几何尺寸有关，还与这两段均匀杆的材料有关；宽端材料密度较大，两段均匀杆杆长为四分之一波长时，阶梯形变幅杆放大系数最大．

关键词：

变幅杆；放大系数；阻抗率

收稿日期：

2006-12-12

中图分类号：

O4261

文献标识码：

文章编号：

1672-4291(2007)04-0052-03

基金项目：

陕西省教育厅科研基金资助项目(07JK216)

Doi:

Amplification nature of stepped ultrasonic transformer

WANG Yan-jun, HE Xi-ping*, ZHANG Pin

(Physical Institute of Shaanxi Province, Xi′an 710062, Shaanxi, China)

Abstract:

The relation between amplification coefficient of half-wavelength stepped ultrasonic transformer and both its physical dimension and material is studied from wave equation of variable cross-section horn. The result indicates that the amplification factor is related not only to its physical dimension but also to material of the horn, and the amplification factor of ultrasonic transformer is maximum when the density of wide end is greater than that of narrow one and the length of the two horns are a quarter of wavelength respectively.

KeyWords:

amplitude transformer horn; amplification factor; impedance rate