Lateral vibration attenuation of a beam with circular cross-section by a support with integrated piezoelectric transducers shunted to negative capacitances
Lateral vibration attenuation of a beam with circular cross-section by a support with integrated piezoelectric transducers shunted to negative capacitances
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DOI：
10.1088/0964-1726/25/9/095045
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发表时间：
2016-08
影响因子：
4.1
通讯作者：
Benedict Götz;M. Schaeffner;R. Platz;T. Melz
中科院分区：
文献类型：
--
作者：
Benedict Götz;M. Schaeffner;R. Platz;T. Melz
由于激励和低阻尼，轻质结构可能会发生不期望的振动。对于梁结构的横向振动衰减，压电换能器分流到负电容可以是一个适当的措施。本文提出了在圆截面梁的弹性支承上集成压电叠层换能器进行横向振动衰减的新概念。在压电弹性支撑中，梁在任意方向上的弯曲被转换成三个堆叠换能器的显著轴向变形，并且因此，梁的表面可以保持没有换能器。对于多模态振动衰减，每个压电换能器被分流到负电容。数值模拟和实验结果表明，集成分流压电叠层换能器的弹性梁支撑的概念能够减少梁在任意方向上的横向振动。
Undesired vibration may occur in lightweight structures due to excitation and low damping. For the purpose of lateral vibration attenuation in beam structures, piezoelectric transducers shunted to negative capacitances can be an appropriate measure. In this paper, a new concept for lateral vibration attenuation by integrated piezoelectric stack transducers in the elastic support of a beam with circular cross-section is presented. In the piezoelastic support, bending of the beam in an arbitrary direction is transformed into a significant axial deformation of three stack transducers and, thus, the beam’s surface may remain free from transducers. For multimodal vibration attenuation, each piezoelectric transducer is shunted to a negative capacitance. It is shown by numerical simulation and experiment that the concept of an elastic beam support with integrated shunted piezoelectric stack transducers is capable of reducing the lateral vibration of the beam in an arbitrary direction.