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第 38 卷 第 3 期 Vol. 38, No. 3
2019 年 5 月 Journal of Applied Acoustics May, 2019

⋄ 2018年度检测声学会议优秀论文 ⋄

PVDF梳状换能器接收非线性兰姆波的实验研究 ∗

丁涛涛 1 朱武军 1 项延训 1† 邓明晰 2

(1 华东理工大学机械与动力工程学院 承压系统与安全教育部重点实验室 上海 200237)
(2 重庆大学航空航天学院 重庆 400044)

摘要 该文基于 PVDF 压电薄膜对梳状换能器进行设计制作，并将该换能器应用于接收非线性兰姆波信号实
验研究。首先通过输出矢量和方法分析 PVDF 梳状换能器的工作特性，然后将设计制作的 PVDF 梳状换能器
应用于铝板中非线性兰姆波信号的接收，并与传统压电陶瓷换能器经斜劈接收的非线性兰姆波信号进行比较
分析。实验结果表明，两种换能器所接收到的信号幅值随传播距离的变化趋势相近，线性增长的积累效应表征
结果相似，且 PVDF 梳状换能器可以对基波和二次谐波信号同时响应。除此之外，PVDF 梳状换能器用于接
收非线性兰姆波信号更加稳定。因此，PVDF 梳状换能器有望应用于复杂构件的在线检测与监测研究。
关键词 非线性兰姆波，PVDF 梳状换能器，二次谐波，稳定性
中图法分类号: TB552 文献标识码: A 文章编号: 1000-310X(2019)03-0301-06
DOI: 10.11684/j.issn.1000-310X.2019.03.003

Receiving nonlinear Lamb waves using PVDF comb transducer

DING Taotao 1 ZHU Wujun 1 XIANG Yanxun 1 DENG Mingxi 2

(1 Key Laboratory of Pressure Systems and Safety of MOE, School of Mechanical and Power Engineering,
East China University of Science and Technology, Shanghai 200237, China)
(2 College of Aerospace Engineering, Chongqing University, Chongqing 400044, China)
Abstract In this paper, the comb transducer is designed based on PVDF piezoelectric film, and the transducer
is applied to the experimental study of receiving nonlinear Lamb wave signals. Firstly, the harmonic-frequency
characteristics of PVDF comb transducer are analyzed by output-vector addition method. Then, the designed
PVDF comb transducer is applied to the reception of the Lamb wave nonlinear harmonic signal in the aluminum
plate, and compared the result with the nonlinear Lamb wave signal received by the traditional piezoelectric
ceramic transducer through the oblique beam. The experimental results show that the changing tendencies
of amplitude under different propagating distances achieved by two transducers are similar to each other.
The PVDF comb transducer can respond to both the fundamental and second harmonic signals. In addition,
PVDF comb transducers are more stable for receiving nonlinear Lamb wave signals. Therefore, PVDF comb
transducers are expected to be applied to online detection and monitoring of complex components.
Key words Nonlinear Lamb wave, PVDF comb transducer, Second harmonic wave, Stability

2018-11-05 收稿; 2019-01-03 定稿
国家自然科学基金项目 (11774090, 11834008)
∗
作者简介: 丁涛涛 (1993- ), 男, 山东临沂人, 硕士研究生, 研究方向: 超声无损检测。
† 通讯作者 E-mail: yxxiang@ecust.edu.cn