| 压电超材料梁中弹性波带隙特性与界面传输的主动控制 |
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| 引用本文： | 孙文静,王毅泽.压电超材料梁中弹性波带隙特性与界面传输的主动控制[J].应用数学和力学,2022,43(1):14-25. |
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| 作者姓名： | 孙文静 王毅泽 |
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| 作者单位： | 1.北京交通大学 土木建筑工程学院 力学系，北京 100044 |
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| 基金项目： | 国家自然科学基金(11922209,11991031,12021002)。 |
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| 摘 要： | 该文采用周期压电负电容电路,研究了弹性波超材料梁中带隙特性的主动控制问题.该系统利用外部电路改变所连接压电材料的材料参数,从而改变结构的等效参数,实现对带隙特性的调控.通过对单胞进行控制,可观察到主动控制系统作用时带隙的产生与消失.构造了含有交界面的弹性波超材料梁结构,分析了主动控制系统对波动界面传输特性的影响.
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| 关 键 词： | 弹性波超材料 主动控制 带隙特性 界面传输 不等厚压电片 |
| 收稿时间： | 2021-05-07 |
Active Control on Band Gap Properties and Interface Transmission of Elastic Waves in Piezoelectric Metamaterial Beams |
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| SUN Wenjing,WANG Yize.Active Control on Band Gap Properties and Interface Transmission of Elastic Waves in Piezoelectric Metamaterial Beams[J].Applied Mathematics and Mechanics,2022,43(1):14-25. |
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| Authors: | SUN Wenjing WANG Yize |
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| Institution: | 1.Department of Mechanics, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, P.R.China2.Department of Mechanics, School of Mechanical Engineering, Tianjin University, Tianjin 300350, P.R.China |
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| Abstract: | The active control on band gap properties of elastic wave metamaterial beams was studied by means of the negative capacitance circuits attached to piezoelectric sheets periodically. External circuits were used to change the material constants of the connected piezoelectric materials, which could tune the equivalent parameters of the structure and control the band gap characteristics. Through controlling the unit cell, the generation and disappearance of band gaps can be observed with the active control system. Then, an elastic wave metamaterial beam with the interface was constructed to discuss the effects of the active control system on the interface transmission. |
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| Keywords: | elastic wave metamaterial active control band gap property interface transmission piezoelectric patches with different thicknesses |
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