| Summary: | 碩士 === 國立成功大學 === 系統及船舶機電工程學系碩博士班 === 97 === This thesis investigates a new type of piezoelectric composite transducer ,which called Cymbal transducer. The investigation covers theoretical simulation, fabrication, and experimentation measurement.
The Cymbal transducer was designed with the finite element method(FEM). Using the FEM software to compute the natural frequency and displacement information of Cymbal transducer respectively by ANSYS modal analysis and harmonic analysis. Finally, this study imported the results into the LMS Virtual Lab Acoustic software, which is using boundary element method(BEM) and Helmholtz integral equation to compute the radiation sound field.
The fabrication of transducer selected piezoelectric ceramics as the drive components r, brass as cymbal cap, manufactured the cymbal transducer, and combined the sound field measurement system to test the performance of transducer. Experimental parameters of the test includes the frequency spectrum, sound source intensity, and beam pattern, and compared with the simulation results to grasp transducer design and analysis capabilities.
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