基于多普勒激光测振仪的Ⅲ型弯张换能器振动模态分析
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摘要
为了测量和验证Ⅲ型弯张换能器在工作状态时辐射面的振动情况,采用多普勒激光测振仪对Ⅲ型弯张换能器的振动模态进行了测量,并与有限元软件仿真结果进行了对比。测量得到换能器壳体的一阶振动模态的谐振频率为1729 Hz,换能器一阶振动模态的谐振频率为2 065 Hz,与有限元模态仿真结果吻合较好。研究结果表明,多普勒激光测振仪能较好地对换能器的振动模态进行测量,可用于换能器的辅助设计。
In order to test and verify the radiation surface vibration of Class Ⅲ flextensional transducer in working state,Doppler laser vibrometer is used to measure the vibration modes of Class Ⅲ flextensional transducer, and then the measuring result is compared with the simulation result of finite element software. The measurement shows that the resonant frequency of the first-order vibration mode of transducer shell is 1 729 Hz, and the resonant frequency of the first-order vibration mode of transducer is 2 065 Hz. They are closed to the simulation results. Research results show that Doppler laser vibrometer could be well used for measuring transducer vibration mode and for transducer aided design.
In order to test and verify the radiation surface vibration of Class Ⅲ flextensional transducer in working state,Doppler laser vibrometer is used to measure the vibration modes of Class Ⅲ flextensional transducer, and then the measuring result is compared with the simulation result of finite element software. The measurement shows that the resonant frequency of the first-order vibration mode of transducer shell is 1 729 Hz, and the resonant frequency of the first-order vibration mode of transducer is 2 065 Hz. They are closed to the simulation results. Research results show that Doppler laser vibrometer could be well used for measuring transducer vibration mode and for transducer aided design.
引文
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[2]蓝宇.低频宽带弯张换能器研究[D].哈尔滨:哈尔滨工程大学,2005.LAN Yu.The study of low-frequency broad-band flextensional transducers[D].Harbin:Harbin Engineering University,2005.
[3]王世全.Ⅲ型弯张换能器的二维有限元建模[C]//中国声学学会2005年青年学术会议,2005.WANG Shiquan.2-D FEM modeling of classⅢflextensional transducer[C]//The Youth Academic Conference of Acoustical Society of China,2005.
[4]栾桂东,张金铎,王仁乾.压电换能器和换能器基阵[M].北京:北京大学出版社,2005.LUAN Guidong,ZHANG Jinduo,WANG Renqian.Piezoeletric transducer and arrays[M].Beijing:Peking University Press,2005.