梳状换能器在非线性兰姆波中的应用
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- 英文论文题名：Comb transducers for nonlinear Lamb waves
- 论文作者：朱颖 ; 邓明晰 ; 高东宝 ; 韩开锋 ; 曾新吾
- 英文论文作者：ZHU Ying ; DENG Ming-xi ; GAO Dong-bao ; HAN Kai-feng ; ZENG Xin-wu ; Institute of Marine Science and Engineering ; National University of Defense Technology ; Department of Physics ; Logistics Engineering University
- 年：2016
- 作者机构：国防科学技术大学海洋科学与工程研究院;后勤工程学院物理教研室;
- 论文关键词：梳状换能器 ; PVDF ; 非线性兰姆波 ; 二次谐波
- 英文论文关键词：Comb transducers ; PVDF ; Nonlinear Lamb waves ; Second harmonic waves
- 会议召开时间：2016-10-28
- 会议录名称：2016年全国声学学术会议论文集
- 语种：中文
- 分类号：TB552
- 学会代码：OGSM
- 会议名称：2016年全国声学学术会议
- 会议地点：中国湖北武汉
- 主办单位：中国声学学会
- 学会名称：中国声学学会
- 页数：4
- 文件大小：479k
- 原文格式：D
- 会议级别：全国
摘要
梳状换能器目前已经被用于线性兰姆波检测当中,在非线性兰姆波研究中却很少出现,因此本文提出将PVDF梳状换能器用于非线性兰姆波的激发与接收当中。本文用输出矢量和方法分析获得了梳状换能器的基本特性,利用设计制作的PVDF梳状换能器在铝板中激发出特定模式兰姆波,并检测到非线性信号。通过改变接收增益观察相对非线性系数变化情况,实验验证了非线性信号的来源。理论与实验结果表明,梳状换能器的周期节长可以被用于控制其所激发的兰姆波模式,同时梳状换能器能够实现对基波与二次谐波信号的同时响应,该特性决定其可以被用于非线性兰姆波的激发与接收实验研究。
Comb transducers have already been used in linear Lamb wave inspection studies, but rarely in nonlinear Lamb waves. So the development of PVDF comb transducers for the nonlinear Lamb wave generation and reception in plates is described. The basic characteristics are obtained by the method of output vector addition that comb transducers could be designed to generate modes with specific wavelength by controlling the electrode finger spacing, and could respond to integral multiple of fundamental frequency. Then a selected Lamb mode is generated, and received with its nonlinear signal excited during the Lamb wave propagation in a plate, by PVDF comb transducers designed and made in this research. And the source of the double frequency signal is explained by observing the variation of relative nonlinear parameter when the receiving gain is changed. It is shown that PVDF comb transducers can be used in nonlinear Lamb wave inspection studies, for who can respond to fundamental and second harmonic signals simultaneously.
Comb transducers have already been used in linear Lamb wave inspection studies, but rarely in nonlinear Lamb waves. So the development of PVDF comb transducers for the nonlinear Lamb wave generation and reception in plates is described. The basic characteristics are obtained by the method of output vector addition that comb transducers could be designed to generate modes with specific wavelength by controlling the electrode finger spacing, and could respond to integral multiple of fundamental frequency. Then a selected Lamb mode is generated, and received with its nonlinear signal excited during the Lamb wave propagation in a plate, by PVDF comb transducers designed and made in this research. And the source of the double frequency signal is explained by observing the variation of relative nonlinear parameter when the receiving gain is changed. It is shown that PVDF comb transducers can be used in nonlinear Lamb wave inspection studies, for who can respond to fundamental and second harmonic signals simultaneously.
引文
[1]Deng M X.Analysis of second-harmonic generation of Lamb modes using a modal analysis approach[J].Journal of Applied Physics 2003,94:4152-4159.
[2]Deng M,Pei J F.Assessment of accumulated fatigue damage in solid plates using nonlinear lamb wave approach[J].Applied Physics Letters2007;90:121902.
[3]Metya A K,Ghosh M,Parida N,Balasubramaniam K.Effect of tempering temperatures on nonlinear Lamb wave signal of modified9Cr–1Mo steel[J].Materials Characterization,2015;107:14-22.
[4]Rauter N,Lammering R.Impact damage detection in composite structures considering nonlinear Lamb wave propagation[J].Mechanics of Advanced Materials And Structures 2015,22:44-51.
[5]Pruell C Kim J Y,Qu J,Jacobs L J.A nonlinear-guided wave technique for evaluating plasticity-driven material damage in a metal plate[J].NDT&E International 2009,42:199-203.
[6]Castaings M,Monkhouse R S C,Lowe M J S,Cawley P.The performance of flexible interdigital PVDF lamb wave transducers[J].Acustica,acta acustica 1999,85:842-849.
[7]Brian L F D,Enas M A M,Arnfinn F P.A PVDF Transducer For Low-Frequency Acceleration Measureents[J].ISA Transactions 2004,43:319-328.
[8]Li W,Cho Y.Thermal fatigue damage assessment in an isotropic pipe using nonlinear ultrasonic guided waves[J].Experimental Mechanics2014,54:1309–1318.
[9]肖鸣山,宋道仁.声表面波器件基础[M].山东科学技术出版社1979;64-68.Xiao MS,Song DR.Basis of SAW devices[M].Shandong science and technology press 1979,64-68.
[10]桂冬,张金铎,王仁乾.压电换能器和换能器阵[M].北京大学出版社2005,196-188.Luan GD,Zhang JD,Wang RQ.Piezoelectric transducers and Arrays[M].Peking University press 2005,196-188.
[2]Deng M,Pei J F.Assessment of accumulated fatigue damage in solid plates using nonlinear lamb wave approach[J].Applied Physics Letters2007;90:121902.
[3]Metya A K,Ghosh M,Parida N,Balasubramaniam K.Effect of tempering temperatures on nonlinear Lamb wave signal of modified9Cr–1Mo steel[J].Materials Characterization,2015;107:14-22.
[4]Rauter N,Lammering R.Impact damage detection in composite structures considering nonlinear Lamb wave propagation[J].Mechanics of Advanced Materials And Structures 2015,22:44-51.
[5]Pruell C Kim J Y,Qu J,Jacobs L J.A nonlinear-guided wave technique for evaluating plasticity-driven material damage in a metal plate[J].NDT&E International 2009,42:199-203.
[6]Castaings M,Monkhouse R S C,Lowe M J S,Cawley P.The performance of flexible interdigital PVDF lamb wave transducers[J].Acustica,acta acustica 1999,85:842-849.
[7]Brian L F D,Enas M A M,Arnfinn F P.A PVDF Transducer For Low-Frequency Acceleration Measureents[J].ISA Transactions 2004,43:319-328.
[8]Li W,Cho Y.Thermal fatigue damage assessment in an isotropic pipe using nonlinear ultrasonic guided waves[J].Experimental Mechanics2014,54:1309–1318.
[9]肖鸣山,宋道仁.声表面波器件基础[M].山东科学技术出版社1979;64-68.Xiao MS,Song DR.Basis of SAW devices[M].Shandong science and technology press 1979,64-68.
[10]桂冬,张金铎,王仁乾.压电换能器和换能器阵[M].北京大学出版社2005,196-188.Luan GD,Zhang JD,Wang RQ.Piezoelectric transducers and Arrays[M].Peking University press 2005,196-188.