变幅杆位移节点和应变极大位置的关系  

The relationship between displacement node and strain maxima of horn

作　　者：刘豆豆[1] 贺西平[1] 李家星[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710119

出　　处：《陕西师范大学学报（自然科学版）》2014年第3期48-51,共4页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(11374201)

摘　　要：针对常见单一形状函数纵振变幅杆,采用解析方法研究了谐振长度、位移节点和应变极大点之间的关系.计算发现在谐振频率下,变幅杆位移节点与应变极大点位置之和约等于其一阶谐振长度.对新型的贝兹曲线变幅杆也做了相应计算,结果验证了该结论的正确性,此结论有助于变幅杆设计计算过程的简化.Using the analytical method,the relation of resonant length with displacement node and strain maxima point of the common horns is studied in this work.It can be found that the sum of displacement node and strain maxima is substantially equivalent to its resonant length.Such rela-tion of the new type Bezier-profile horn is also calculated,and the numerical calculation agree well with the results obtained from the common horns.Rely on the relations,the process of design and calculation can be simplified.

关 键 词：变幅杆 贝兹曲线变幅杆 谐振长度 位移节点 应变极大点 

分 类 号：O426.1[理学—声学]