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首页> 外文会议>Thirteenth International Conference on Adaptive Structures and Technologies; Oct 7-9, 2002; Potsdam, Germany >REDUCTION OF STRUCTURAL VIBRATIONS USING PIEZOELECTRIC MATERIAL AND A PASSIVE ELECTRICAL NETWORK
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REDUCTION OF STRUCTURAL VIBRATIONS USING PIEZOELECTRIC MATERIAL AND A PASSIVE ELECTRICAL NETWORK

机译：利用压电材料和无源电网减少结构振动

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摘要

The application of resistively shunted piezoceramics for reducing vibration amplitudes of a plate is studied. Due to the piezoelectric effect, mechanical energy is transformed into electrical energy, which can be dissipated by means of a passive electrical network. The ability to tailor the frequency dependent loss factor is a consequence of the applied passive electrical network. The resulting effective material loss factor is closely related to the electromechanical coupling coefficient. To predict the damping performance of resistively shunted piezoelectrics, an approach based on the effective strain energy fraction is proposed. A finite element model may be used to accurately determine the effective modal strain energy fraction. However, for placing purposes of the piezoelectric elements, an analytical model, which does not account for local stiffening due to the piezoceramics, can be used. Design considerations include the frequency dependence of piezoceramic properties as well as the effect of stiff piezoceramic material on modeshapes. Experimental results are presented for a rectangular plate with eight pairs of resistively shunted piezoelectric elements.
机译：研究了电阻分流压电陶瓷在减小平板振动幅度中的应用。由于压电效应，机械能转化为电能，可以通过无源电网将其消散。调整频率相关损耗因子的能力是所应用无源电网的结果。产生的有效材料损耗因子与机电耦合系数密切相关。为了预测电阻分流压电的阻尼性能，提出了一种基于有效应变能分数的方法。可以使用有限元模型来准确确定有效模态应变能分数。然而，为了放置压电元件，可以使用不考虑由于压电陶瓷引起的局部硬化的分析模型。设计考虑因素包括压电陶瓷特性的频率依赖性以及刚性压电陶瓷材料对振型的影响。给出了具有八对电阻分流压电元件的矩形板的实验结果。

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