【作者】 廖然； 李全禄； 吴晶； 王勇； 陈海霞；

【Author】 LIAO Ran~1,LI Quan-lu~(1,2,*),WU Jing~1,WANGYong~1,CHEN Hai-xia~1 (1.Institute of Applied Acoustics,Shaanxi Normal University,2.Shaanxi’Key Laboratory of Ultrasound,Xi’an 710062,China)

【机构】 陕西师范大学应用声学研究所； 陕西省超声重点实验室；

【摘要】 本文推导了自由边界弯振薄圆盘的频率方程,设计了20kHz的弯振圆盘并进行实验测试.在自由边界条件弯振薄圆盘的振动理论基础上,设计了同频率、同半径、同节线半径的阶梯圆盘进行实验测试,测试结果表明按照弯振圆盘理论设计出的阶梯圆盘的频率与理论值相差较大,而节线位置相差不大.本文针对上述问题提出相关改进方法,具体分析阶梯圆盘的振动理论,推导出阶梯圆盘的频率方程.对提高超声换能器的辐射效率和指向性有一定的参考价值.更多还原

【Abstract】 Free boundary curve is derived and the frequency of vibration of thin disk equation of bending vibration is designed 20kHz disc and experimental test.Free boundary conditions in the thin disk bending mode of vibration theory, the design of the same frequency,with the radius,the radius of the ladder line with the disc section tested,test results show that in accordance with the bending vibration theory to design the ladder disc disc The frequency difference between the larger theoretical value,while the section of line position of the same.Ultrasonic transducer to improve the radiation efficiency and directivity of some reference value.更多还原