摘要
为了研究压电驱动器与热声谐振腔间的耦合特性,建立了压电驱动系统的网络模拟模型。根据压电片的简支和固定两种边界条件,对压电驱动器及(热)声谐振腔声负荷系统的频率和电压特性进行了模拟计算。研究结果显示在高频时系统元件间的耦合特性较低频时好,具有简支边界的压电片产生的声压级比固定边界的要大得多,声压级随输入电压的变化特性计算与实验是相一致的。该模型可用于热声制冷机中压电驱动系统的特性分析。
A network model was developed to analyze a piezoelectric source driving a resonantor to investigate the coupling of the piezoelectric loudspeaker with a thermoacoustic resonantor. The frequency and voltage characteristics of the piezoelectrically driven system were calculated numerically from the two boundary conditions for the piezoelectric plate. The results show that the coupling between the system components is better at high frequencies than at low frequencies. The sound pressure produced by a simply supported piezoelectric plate is much larger than for a clamped plate, The predicted change in the acoustic pressure with input voltage to the piezoelectric driver agrees well with measured results. Therefore, the network model can be used to analyze the characteristics of piezoelectric drive systems in thermoacoustic refrigerators.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第12期2032-2036,共5页
Journal of Tsinghua University(Science and Technology)
基金
中国博士后科学基金(023204002)
关键词
热声制冷
高频
压电驱动器
网络模型
耦合特性
thermoacoustic refrigerators piezoelectric driver
network characteristic high-frequency
model
coupling
