Attenuation of wave propagation in fluid-loaded shells with periodic shunted piezoelectric rings
Attenuation of wave propagation in fluid-loaded shells with periodic shunted piezoelectric rings
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DOI：
10.1088/0964-1726/14/4/018
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发表时间：
2005-08-01
影响因子：
4.1
通讯作者：
Baz, A
中科院分区：
文献类型：
--
作者：
Thorp, O;Ruzzene, M;Baz, A
对圆柱壳的振动和声辐射进行了分析和控制。分流压电环周期性地沿着壳长放置，作为阻抗失配的来源。所得到的周期性结构的特征在于以频带“、"阻带”为特征的行为，其中振动被衰减并且波传播被阻碍。阻带的位置和宽度由沿着结构引入的阻抗失配控制。在所考虑的结构中，阻带可以通过选择适当的分流电路来调节。建立了有限元模型，预测了所考虑的壳类的结构响应和声辐射。该模型考虑了环的存在和分流参数对结构行为的影响。所开发的模型是用来估计的频率响应函数的外壳，并制定所考虑的周期性结构的传递矩阵。传递矩阵确定波传播的性质，特别是可以用来估计阻带。所提出的结果表明，所提出的概念时，通过一个磁阻电感电路的环分流的有效性。所考虑的分流策略能够在调谐频率处产生额外的阻带。阻带的位置不受流体负载的存在的影响，这证明了所考虑的振动控制处理相对于显著的结构修改的鲁棒性。
The vibration and the sound radiation of cylindrical shells are analyzed and controlled. Shunted piezoelectric rings are placed periodically along the shell length to act as sources of impedance mismatch. The resulting periodic structure features a behavior which is characterized by frequency bands,,stop bands', where the vibrations are attenuated and wave propagation is impeded. The location and the width of the stop bands are controlled by the impedance mismatch introduced along the structure. In the considered configuration, the stop bands can be tuned by proper selection of the shunting circuit.A finite element model is developed to predict the structural response and the acoustic radiation of the considered class of shells. The model accounts for the presence of the rings and for the effect of the shunting parameters on the behavior of the structure. The developed model is used to estimate the frequency response function of the shell and to formulate the transfer matrix for the considered periodic structure. The transfer matrix determines the nature of wave propagation and in particular can be used to estimate the stop bands. The presented results show the effectiveness of the proposed concept when the rings are shunted through a resistive-inductive circuit. The considered shunting strategy is able to generate an additional stop band at the tuning frequency. The location of the stop band is unaffected by the presence of the fluid loading, which demonstrates the robustness of the considered vibration control treatment with respect to significant structural modifications.