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首页> 外文期刊>Smart Materials & Structures >Passive damping of beam vibrations through distributed electric networks and piezoelectric transducers: prototype design and experimental validation
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Passive damping of beam vibrations through distributed electric networks and piezoelectric transducers: prototype design and experimental validation

机译：通过分布式电网和压电换能器的梁振动的被动阻尼：原型设计和实验验证

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摘要

The aim of this work is two-fold: to design devices for passive electric damping of structural vibrations by distributed piezoelectric transducers and electric networks, and to experimentally validate the effectiveness of such a damping concept. Two different electric networks are employed, namely a purely resistive network and an inductive-resistive one. The presented devices can be considered as distributed versions of the well-known resistive and resonant shunt of a single piezoelectric transducer. The technical feasibility and damping effectiveness of the proposed novel devices are assessed through the construction of an experimental prototype. Experimental results are shown to be in very good agreement with theoretical predictions. It is proved that the presented technique allows for a substantial reduction in the inductances used when compared with those required by the single resonant shunted transducer. In particular, it is shown that the required inductance decreases when the number of piezoelectric elements is increased. The electric networks are optimized in order to reduce forced vibrations close to the first resonance frequency. Nevertheless, the damping effectiveness for higher modes is experimentally proved. As well as specific results, fundamental theoretical and experimental considerations for passive distributed vibration control are provided.
机译：这项工作的目的有两个：设计用于通过分布式压电换能器和电网对结构振动进行无源电阻尼的设备，并通过实验验证这种阻尼概念的有效性。采用了两种不同的电网，即纯电阻网络和感应电阻网络。所提出的装置可以被认为是单个压电换能器的电阻和谐振分流器的分布式版本。通过实验原型的构建来评估所提出的新型装置的技术可行性和阻尼效果。实验结果表明与理论预测非常吻合。事实证明，与单谐振并联换能器所要求的电感相比，所提出的技术可以大大减少所使用的电感。特别地，示出了当压电元件的数量增加时所需的电感减小。为了减少接近第一共振频率的强制振动，优化了电网。然而，实验证明了较高模式的阻尼效果。除了具体的结果，还提供了被动分布式振动控制的基本理论和实验考虑。

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