关键词: 磁致伸缩换能器, 驻波波形, 谐振腔声压, 热声制冷

Abstract: Aiming at the acoustic field waveform of the resonator driven by magnetostrictive transducer,based on the theoretical analysis of the standing wave field in the theoretical analysis tube,the finite element software ATILA was used to analyze the magneto-mechanical coupling and gas-solid coupling analysis,and the transconductance was obtained by simulating the acoustic field waveform of the resonant cavity driven by the magnetostrictive transducer.The magnitude of the sound pressure produced by the resonant cavity under the six alternating current excitation of 1 000~6 000 Hz is obtained.The displacement of the radiator plate of the transducer with six alternating currents is extracted and the sound pressure value of the resonator is obtained.Numerical Curve of displacement value of radiation plate.It is found that the temperature of the resonant cavity can be increased by increasing the current frequency,so as to improve the cooling capacity of the thermoacoustic refrigerator.The experimental results are in good agreement with the simulation results,which verifies the accuracy of the simulation results and also provides an accurate basis for the actual working conditions.

Key words: magnetostrictive transducer, standing wave waveform, resonant cavity sound pressure, thermoacoustic refrigeration