Lamb wave generation and reception with time-delay periodic linear arrays: a BEM simulation and experimental study

1999 ◽  
Vol 46 (3) ◽  
pp. 654-664 ◽  
Author(s):  
Wenhao Zhu ◽  
J.L. Rose
Keyword(s):  
Experimental Study ◽  
Time Delay ◽  
Lamb Wave ◽  
Wave Generation ◽  
Linear Arrays ◽  
Periodic Linear

Influence of Adhesive Layer on Actuation of Lamb Wave Signals

2012 ◽  
Vol 525-526 ◽  
pp. 617-620 ◽  
Author(s):  
Z. Sharif-Khodaei ◽  
Qu Liu ◽  
M.H. Aliabadi
Keyword(s):  
Lamb Wave ◽  
Adhesive Layer ◽  
Composite Plates ◽  
Wave Generation ◽  
Actuation Frequency ◽  
Adhesive Thickness

In this work, Lamb wave generation and propagation have been modelled in composite plates. Actuation and acquisition of signals when the PZT transducers are tied to the structure or bonded with an adhesive layer are investigated. The effect of adhesive thickness and actuation frequency of Lamb wave have been examined.

Flexible Tunable Interdigital Transducer for Lamb Wave Generation

2016 ◽  
Vol 251 ◽  
pp. 120-125
Author(s):  
Michał Mańka
Keyword(s):  
Lamb Wave ◽  
Power Source ◽  
Wave Generation ◽  
Interdigital Transducer ◽  
Novel Concept ◽  
Physical Changes

In this paper a novel concept of the MFC based IDT, Tunable Interdigital Transducer (T-IDT), is presented. The proposed transducer is the extension of the MFC based IDT, where the solid comb electrodes are replaced by series of discrete, stripe electrodes which can be connected independently into the groups and connected to the power source. The span between the centers of the electrodes' groups connected to the same phase are corresponding to the nominal wavelength of the wave excited by the transducer. This makes possible matching to different wavelengths without a need of physical changes of the electrodes’ layout.

Interdigitated PVDF transducer for Lamb wave generation and reception

2005 ◽  
Author(s):  
Hua Gu ◽  
George M. Lloyd ◽  
Ming L. Wang
Keyword(s):  
Lamb Wave ◽  
Wave Generation

Time-Delay Multiplexing With Linear Arrays of THz Radar Transceivers

2014 ◽  
Vol 4 (2) ◽  
pp. 232-239 ◽  
Author(s):  
Beatriz Blazquez ◽  
Ken B. Cooper ◽  
Nuria Llombart
Keyword(s):  
Time Delay ◽  
Linear Arrays

Research on Parallel PZT Phased Array Based Structural Health Monitoring in CFPR

2013 ◽  
Vol 753-755 ◽  
pp. 2343-2346
Author(s):  
Ya Jie Sun ◽  
Yong Hong Zhang ◽  
Hui Qiang Tang ◽  
Cheng Shan Qian ◽  
Shen Fang Yuan
Keyword(s):  
Time Delay ◽  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Lamb Wave ◽  
Phased Array ◽  
Signal Amplitude ◽  
Gray Scale ◽  
One Dimensional ◽  
Structural Health ◽  
Damage Location

Phased array theroy can controll the Lamb wave beem steering in certain range by adding the time delay to the signals. Phased array theory is used to identify the damge in the structure. One dimensional PZT array is restricted in monitoring distance. Two parellel PZT sensors arrays are utilized to monitor the CFPR structure to extend the monitoring distance and to improve the precision of the damage locatilization. The experiment is done on the CFPR structure by using two parellel PZT arrays to detect the damage in the structure. The results of the experiment is shown on the mapped image. Gray-scale in the mapped image from dark to light corresponds to the signal amplitude from low to high. The highlight of the mapped image is the damage location in the structure. The monitoring results in the CFPR structure by two parellel PZT arrays is accurate and identical.

scholarly journals AN EXPERIMENTAL STUDY ON NONLINEAR WAVE DYNAMICS: ROUGE WAVE GENERATION AND WAVE BLOCKING

2014 ◽  
Vol 1 (34) ◽  
pp. 34
Author(s):  
Wen-Yang Hsu ◽  
Igor Shugan ◽  
Wen-Son Chiang ◽  
Ray-Yeng Yang ◽  
Hwung-Hweng Hwung ◽  
...  
Keyword(s):  
Experimental Study ◽  
Nonlinear Wave ◽  
Wave Generation ◽  
Wave Dynamics ◽  
Wave Blocking ◽  
Rouge Wave

Experimental Study on Breakdown Time Delay of Hundreds of Nanoseconds Pulse Under Different du/dt for mm Gaps

2019 ◽  
Vol 47 (10) ◽  
pp. 4579-4583 ◽  
Author(s):  
Fan Guo ◽  
Shi He ◽  
Wei Jia ◽  
Junna Li ◽  
Zhiqiang Chen ◽  
...  
Keyword(s):  
Experimental Study ◽  
Time Delay ◽  
Breakdown Time
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