一种扭转振动复合换能器等效电路的研究  

Study on the electro-mechanical equivalent circuit of a torsional vibration compound transducer

作　　者：叶发根[1] 曹辉[1] 林书玉[1] 

机构地区：[1]陕西师范大学应用声学研究所,陕西西安710062

出　　处：《西北大学学报（自然科学版）》2010年第1期34-38,共5页Journal of Northwest University（Natural Science Edition）

基　　金：陕西师范大学研究生培养创新基金资助项目(2009CXS024);理科校重点科研基金资助项目;陕西省教育厅基金资助项目(07JK215);陕西省自然科学基金资助项目(2005A02);国家自然科学基金资助项目(10674090)

摘　　要：目的对一种扭转振动复合超声换能器进行研究。方法仿真建模,有限元分析法。结论建立了此换能器机电类比等效电路模型,推导了此换能器的扭转振动频率方程的解析式及共振频率的计算公式;分析了换能器的共振频率与其几何尺寸之间的关系,对该换能器的扭转振动模态进行了分析。结果换能器的共振频率在其他尺寸不变时随着外环金属薄圆环的半径增大而降低,随着内环金属薄圆环的内半径减小而降低。Aim A type of torsional vibration compound ultrasonic transducer is studied in this paper.Methods Emulational model and FEM is used.Results The electro-mechanical equivalent circuit of the compound ultrasonic transducer is established.The torsional vibration frequency equation and resonance frequency calculation formula of the transducer are obtained.The relation between resonance frequency and size of the transducer is analyzed.The mode of ultrasonic transducer is analyzed by FEM.Conclusion The resonance frequency of the transducer is augment with the radius of outer metal ring decrease,and minished with the radius of inner metal ring decrease when other sizes of the transducer are not chang.

关 键 词：超声换能器 扭转振动 机电等效电路 共振频率 

分 类 号：O426.2[理学—声学]