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《Journal of Vibration and Shock》 2011-07
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Frequency equation of a sandwich transducer with complex transformer

QIN Lei,WANG li-kun,TANG hui-yan,SUN Bai-sheng(Research Center of Sensor Technology,Beijing University of Information Science & Technology Beijing 100101,China)  
A sandwich transducer with complex transformer was proposed and designed.Based on the electro-mechanical equivalent circuit theory,the model of the sandwich transducer was built,and the frequency equation was deduced.Considering the influence of the latten electrodes on the density and the equivalent sound velocity,a modification of this equation was given using the equivalent parameter theory.Transducers were prepared to validate this modification,the error between the calculation and the experimental results reduced from 2.09%(before modification) to 0.64%(after modification).
【Fund】: 国家自然科学基金资助项目(61072004);; 北京市属市管高校人才强教计划资助项目(PHR200906132);; 现代测控技术教育部重点实验室资助;; 北京市自然科学基金资助项目(4092014);; 教育部重点实验室资助(KZ201110772040)
【CateGory Index】: TP212
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