DAMPING OF STRUCTURAL VIBRATIONS WITH PIEZOELECTRIC MATERIALS AND PASSIVE ELECTRICAL NETWORKS
DAMPING OF STRUCTURAL VIBRATIONS WITH PIEZOELECTRIC MATERIALS AND PASSIVE ELECTRICAL NETWORKS
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DOI：
10.1016/0022-460x(91)90762-9
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发表时间：
1991-04-22
影响因子：
4.7
通讯作者：
VONFLOTOW, A
中科院分区：
文献类型：
--
作者：
HAGOOD, NW;VONFLOTOW, A
研究了压电材料与无源电路并联耗散机械能的可能性。导出了压电元件被任意电路分流时的有效机械阻抗。分流压电具有频率依赖的刚度和损耗因子，这也取决于分流电路。一般分流模型是专门为两个分流电路：一个电阻单独的情况下，电阻和电感。对于电阻分流，材料特性表现出与粘弹性材料类似的频率依赖性，但更坚硬且更独立于温度。用电阻器和电感器分流引入电谐振，其可以以类似于机械振动吸收器的方式最佳地调谐到结构谐振。技术分析系统，将这些分流的情况下，悬臂梁实验和应用。电阻和谐振分流电路的实验结果验证了分流压电阻尼模型。
The possibility of dissipating mechanical energy with piezoelectric material shunted with passive electrical circuits is investigated. The effective mechanical impedance for the piezoelectric element shunted by an arbitrary circuit is derived. The shunted piezoelectric is shown to possess frequency dependent stiffness and loss factor which are also dependent on the shunting circuit. The generally shunted model is specialized for two shunting circuits: the case of a resistor alone and that of a resistor and inductor. For resistive shunting, the material properties exhibit frequency dependence similar to viscoelastic materials, but are much stiffer and more independent of temperature. Shunting with a resistor and inductor introduces an electrical resonance, which can be optimally tuned to structural resonances in a manner analogous to a mechanical vibration absorber. Techniques for analyzing systems which incorporate these shunting cases are presented and applied to a cantilevered beam experiment. The experimental results for both the resistive and resonant shunting circuits validate the shunted piezoelectric damping models.