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| 径扭复合模式盘形压电超声换能器 | |
| 引用本文： | 刘世清,姚晔,林书玉.径扭复合模式盘形压电超声换能器[J].机械工程学报,2009,45(6). |
| 作者姓名： | 刘世清 姚晔 林书玉 |
| 作者单位： | 1. 浙江师范大学数理与信息工程学院,金华,321004 2. 上海交通大学机械与动力工程学院,上海,200240 3. 陕西师范大学应用声学研究所,西安,710062 |
| 基金项目： | 国家自然科学基金(50708057);;浙江省自然科学基金(Y606238)资助项目 |
| 摘 要： | 提出一种新型的斜缝式结构径扭复合模式振动盘形压电超声换能器,并对其径扭复合模式振动进行了理论和试验研究。通过对斜槽处应力的分解,引入两个机械转换系数,依据机电类比原理,建立起换能器的径扭复合模式振动耦合机电等效电路模型,从等效电路得到换能器的径扭复合振动频率方程,探讨狭缝的斜角对换能器共振频率的影响,数值计算表明换能器共振频率随斜角增大而降低。试验加工三个不同斜度狭缝的换能器,并对其共振频率进行了测试和有限元法模态仿真计算,结果表明,理论与仿真值及试验结果吻合较好。 |
| 关 键 词： | 径扭复合振动 压电换能器 耦合等效电路 频率方程 |
Radial-torsional Vibration Mode of Disc-type Piezoelectric Transducer |
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| LIU Shiqing,YAO Ye,LIN Shuyu.Radial-torsional Vibration Mode of Disc-type Piezoelectric Transducer[J].Chinese Journal of Mechanical Engineering,2009,45(6). | |
| Authors: | LIU Shiqing YAO Ye LIN Shuyu |
| Affiliation: | LIU Shiqing1 YAO Ye2 LIN Shuyu3 |
| Abstract: | A new kind of radial-torsional composite mode ultrasonic transducer with multiple slanting slots is presented and studied. Two mechanical conversion coefficients are introduced by resolving the stress at chutes. Based on the electromechanical analogy, the coupled equivalent circuit model of the vibration system is set up and the frequency equation is derived. The effect of the oblique angle of the slots on the resonance frequency of the transducer is analyzed. It is concluded that the resonance frequency de... |
| Keywords: | Radial-torsional vibration mode Piezoelectric transducer Coupled equivalent circuit Frequency equation |
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