CAJ | 학술논문

利用多模耦合原理，将两片不同厚度的1-3型复合材料叠堆，制作宽带压电振子。用串并联理论与等效参数理论，计算不同厚度复合材料的谐振频率，得出构成层叠压电振子的两片复合材料的谐振频率差，并通过实验加以验证。结果显示，实验值与计算值吻合较好。将上述压电振子灌封，制作水声换能器并进行测试。结果表明，四只换能器的–3 dB带宽最大可达80 kHz，最大发送电压响应均在163 dB以上。
이용다모우합원리，장량편불동후도적1-3형복합재료첩퇴，제작관대압전진자。용천병련이론여등효삼수이론，계산불동후도복합재료적해진빈솔，득출구성층첩압전진자적량편복합재료적해진빈솔차，병통과실험가이험증。결과현시，실험치여계산치문합교호。장상술압전진자관봉，제작수성환능기병진행측시。결과표명，사지환능기적–3 dB대관최대가체80 kHz，최대발송전압향응균재163 dB이상。
Broadband composite piles with two layers of 1-3 piezoelectric composites which have different thicknesses were made by using the multi-mode coupling principle. Based on series and parallel models and equivalent theory, resonant frequencies of 1-3 composites with different thicknesses were calculated, and then, resonant frequency difference of the two composites in the composite pile can be obtained. Tested by experiments, the theoretical calculation of resonant frequency difference is in good agreement with the measurement. What’s more, underwater acoustic transducers were made by embedding the composite piles into polyurethane. Measured by the test system, the –3 dB bandwidth can reach 80 kHz and the biggest send voltage responses of the transducers are all greater than 163 dB.