论文部分内容阅读
在压电网络复合板机电耦合波动方程基础上,首先对在其中传播的弯曲波的波动特性进行了分析,发现压电网络复合板中同时存在两种不同频散特性的弯曲波,电感电阻并联型压电网络复合板中存在的两种弯曲波的频散曲线具有频率转向现象;在频率转向区,弯曲波的衰减常数或达到最大或迅速增大这一结论为压电网络复合板的减振降噪设计提供了参考。对压电网络复合板中的能量分析给出了这一结论的机理:即在频率转向区板中的机械能与电能能够进行最大的能量交换;在波动分析的基础上对压电网络复合板的隔声特性进行了分析,发现压电网络复合板隔声曲线上的低谷随外界电感值的变化能够发生移动或者消失,最后结合压电网络复合板的波动频散特性对复合板的隔声机理进行了分析,为设计压电网络复合板的隔声性能提供了理论参考。
Based on the electromechanical coupling wave equation of the piezoelectric network composite plate, the wave characteristics of the bending wave propagating in the piezoelectric network composite plate are analyzed. It is found that there are two kinds of bending wave with different frequency dispersion characteristics in the piezoelectric network composite plate. The dispersion curve of the two kinds of bending waves existing in the piezoelectric network composite plate has the frequency steering phenomenon. In the frequency steering area, the attenuation constant of the bending wave reaches the maximum or rapid increase. The conclusion is that the piezoelectric network composite plate reduces Vibration and noise reduction design provides a reference. The energy analysis of the piezoelectric network composite plate gives the conclusion of this mechanism: the mechanical energy and electrical energy in the frequency steering plate can carry out the maximum energy exchange; on the basis of the wave analysis, the piezoelectric network composite plate It is found that the trough on the acoustic curve of the piezoelectric composite panel can move or disappear with the change of the external inductance. Finally, combining with the dispersion characteristics of the piezoelectric composite panel, the sound insulation mechanism of the composite panel The analysis is done, which provides a theoretical reference for designing the sound insulation performance of the piezoelectric network composite board.