激励源频率对阶梯圆盘节线的影响-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）

物理学

激励源频率对阶梯圆盘节线的影响

宁景锋，贺西平*，王帅军

(陕西师范大学应用声学研究所，陕西西安 710062)

宁景锋，男，硕士研究生，研究方向为声学工程.Email:ningjingf@sina.com.

摘要:

应用有限元方法，计算了具有一定大小激励面积、频率不同的纵向振动夹心式换能器对一阶弯曲振动阶梯圆盘节圆半径的影响.结果表明：纵向振动换能器和阶梯盘有一定联接面积时，随着激励源频率的提高，阶梯圆盘的节圆半径相应增大.当激励源的频率为f=28 kHz时，阶梯圆盘的节圆半径为2.610 cm，即此时阶梯圆盘的节圆半径恢复到点激励下的位置.实验测试与有限元计算结果基本吻合.

关键词：

阶梯圆盘；激励源频率；节圆半径

收稿日期：

2011-01-18

中图分类号：

O426.1

文献标识码：

文章编号：

16724291(2011)05002704

基金项目：

国家自然科学基金资助项目（10874107）；中央高校基本科研业务费专项资金项目（GK201001008）.

Doi:

The effect of the driving frequency on the location of nodal circle of the stepped plate

NING Jingfeng, HE Xiping*，WANG Shuaijun

(Applied Acoustics Institute, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)

Abstract:

Using the finite element method (FEM), the effect of a piezoelectric ceramic sandwiched transducers with a certain excitative area and different frequencies on a stepped plate that produces a firstorder flexural vibration is studied. The results show that with the increase of driving frequency, the nodal circle of the plate increase before the secondorder flexural vibration occurs. When the driving frequency is f=28 kHz, the nodal circle of the stepped plate just return to the edge of the stepped and is 2.610 cm. It is shown experimentally that the results are consistent with that of the FEM basically.

KeyWords:

stepped plate; driving frequency; nodal circular