摘要
研究了粗细端不等长阶梯形变幅杆的谐振频率,分析了谐振频率的降低系数β随面积比的对数lnN2变化的规律,发现粗细端不等长变幅杆与等长变幅杆谐振频率系数随面积比对数的变化关系相似,并且在lnN2>2.40时与局部共振现象吻合.这为阶梯形变幅杆的研究和设计提供了一定依据.
The resonance frequency of stepped ultrasonic transformer with unequal parts in length is studied. The variation law of the resonance frequency of the transformers (β) vs the logarithm of cross-section ratio (ln N^2) is analyzed, and this law is similar for the transformer with unequal parts and equal parts. in length is similar to the law of the transformer with equal parts. When ln N^2>2.40, the law agree with 'local resonance'. The results may be useful to the transformer research and design.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第3期47-49,共3页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(10074043)
陕西师范大学重点科研基金资助项目(995004)
关键词
阶梯
实验研究
吻合
比对
发现
降低
变化
梯形
对数
系数
stepped ultrasonic transformer
resonance frequency
cross-section ratio
local resonance
