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对水下结构声辐射压电控制的压电片布置问题进行了深入的理论和数值分析。首先基于声振耦合理论,对低频段声辐射板的压电传感器和作动器的布置做了定性的分析, 给出了声辐射功率与结构模态比和模态积之间的关系式。其次基于有限元/边界元数值计算方法,对所提出的压电片布置方案进行了辐射声场控制的定量计算。通过计算比较可以看出,基于声振耦合理论的压电片布置方案在低频段所得到的多阶模态控制效果,优于基于振动模态应变贴片理论控制方法所得到的控制效果,可以用来进行流体加载板结构声辐射控制的设计和预测。
In-depth theoretical and numerical analysis of the piezo-electric film placement problem under underwater acoustic pressure is carried out. Firstly, based on the theory of acoustic vibration coupling, the arrangement of piezoelectric sensors and actuators in low-frequency acoustic radiators is qualitatively analyzed, and the relationship between acoustic radiation power and structural modal ratio and modal product is given. Secondly, based on the finite element / boundary element numerical calculation method, the quantitative calculation of the radiated sound field control is carried out for the proposed piezoelectric film arrangement scheme. It can be seen from the calculation and comparison that the multi-mode modal control effect obtained in the low frequency band of the piezoelectric film arrangement scheme based on the acoustic vibration coupling theory is superior to the control effect obtained based on the vibration modal strain-gauge theoretical control method, Design and prediction of acoustic radiation control of fluid loading plate structures.