University of Massachusetts Dartmouth, Fall River, MA 02723, USA.
J Acoust Soc Am. 2011 Aug;130(2):753-63. doi: 10.1121/1.3593364.
The current study considers piezoelectric ceramic electromechanical transducers utilizing axisymmetric vibrations of complete and incomplete spherical shells. Analysis is focused on generating the modes of vibration that can be employed in the design of multimode unidirectional electroacoustic transducers for underwater applications and on determining the electrode configurations that achieve optimal electromechanical coupling for the different modes of vibration considered. Analytical expressions are presented for the modal and intermodal equivalent parameters characterizing the energy state of the shell vibration. Results of calculation and experimental verification of the resonance frequencies and effective coupling coefficients for different modes of vibration of the complete and incomplete spherical shells are in good agreement.
本研究考虑了利用完整和不完整球壳的轴对称振动的压电陶瓷机电换能器。分析的重点是产生可用于设计水下应用的多模单向电声换能器的振动模式，并确定实现不同考虑振动模式的最佳机电耦合的电极配置。给出了表征壳振动能量状态的模态和模态间等效参数的分析表达式。完整和不完整球壳不同振动模式的共振频率和有效耦合系数的计算结果与实验验证结果吻合较好。
