Active tuning of flexural wave in periodic steel-concrete composite beam with shunted cement-based piezoelectric patches
Active tuning of flexural wave in periodic steel-concrete composite beam with shunted cement-based piezoelectric patches
复制标题
分流水泥基压电片周期性钢-混凝土组合梁弯曲波的主动调谐
DOI：
10.1080/15376494.2020.1753864
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发表时间：
2020-06
影响因子：
2.8
通讯作者：
Wang Ji
中科院分区：
文献类型：
--
作者：
Yuan Lili;Cai Zhanhua;Zhao Peng;Du Jianke;Ma Tingfeng;Wang Ji
摘要本文研究了具有周期性表面粘结水泥基压电片（CPP）的钢-混凝土组合梁中的弯曲波。利用声子晶体的思想设计了复合光束。外部电容分流电路连接到CPP上，用于调节复合束流的带隙。利用欧拉梁理论建立了挠曲波动方程。采用平面波展开法和传递矩阵法，计算了弯曲波的复杂带结构，研究了弯曲波的频率范围和带隙内的减振效果。数值结果表明，通过调整外部电容分流电路，可以方便地调节周期结构的带隙。负电容并联电路的调节能力比正电容并联电路的调节能力强。利用负电容可以获得不同的起始低频和宽频带间隙。该方法为设计带隙可调谐而不改变结构的智能梁提供了一条有前途的途径。
Abstract In this paper, flexural wave in a steel-concrete composite beam with periodically surface-bonded cement-based piezoelectric patches (CPP) is studied. The composite beam is designed using the idea of the phononic crystals. The external capacitor shunt circuit is connected to the CPP for regulating the band gap of the composite beam. The flexural wave equations are established by Euler beam theory. Using plane wave expansion method and transfer matrix method, the complex band structures of the flexural wave are calculated to investigate the frequency range and the vibration reduction in band gap. From the numerical results, it is shown that by tuning the external capacitor shunt circuit, the band gap of the periodic structure can be regulated conveniently. The regulation capability of the negative capacitance shunt circuit is stronger than that of the positive capacitance. We can obtain different starting low-frequency and wide band gaps by using negative capacitance. The proposed approach gives a promising way to design intelligent beams whose band gaps can be tuned without modifying the structures.
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