Laser Vibrometry for Bridge Post-Repair Investigation

2011 ◽  
pp. 117-124
Author(s):  
M. Schmieder ◽  
R. Heere ◽  
S. E. Chen ◽  
A. Taylor-Noonan
Keyword(s):  
Laser Vibrometry

New Applications of Laser Vibrometry

2020 ◽  
Vol 84 (6) ◽  
pp. 678-682
Author(s):  
A. V. Stulenkov ◽  
P. I. Korotin ◽  
A. S. Suvorov
Keyword(s):  
Laser Vibrometry ◽  
New Applications

Laser vibrometry of air-coupled Lamb waves

2005 ◽  
Vol 47 (3) ◽  
pp. 123-128 ◽  
Author(s):  
Igor Solodov ◽  
Klaus Pfleiderer ◽  
Gerhard Busse
Keyword(s):  
Lamb Waves ◽  
Laser Vibrometry

scholarly journals Application of Laser Vibrometry to Assess Defects in Ship Hull’s Welded Joints’ Technical Condition

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 895
Author(s):  
Adam Szeleziński ◽  
Adam Muc ◽  
Lech Murawski ◽  
Marcin Kluczyk ◽  
Tomasz Muchowski
Keyword(s):  
Optical Sensors ◽  
Welded Joints ◽  
Measurement Data ◽  
Technical Condition ◽  
Laser Vibrometer ◽  
Laser Vibrometry ◽  
Destructive Testing ◽  
Laser Sensors ◽  
Measurement Methodology ◽  
The Mathematical Model

The paper presents the measurement process and test results for six thin-walled plates with different dynamic characteristics caused by different defects of welded joints. The tests were carried out using non-destructive testing (NDT). The authors made an attempt to determine the validity of the use and degree of effectiveness of the tests based on laser vibrometry in detecting defects in welded joints. The tests of welded plates were carried out using displacement laser sensors and piezoelectric accelerometers, while the source of vibration extortion was a modal hammer. In the adopted measurement methodology, the application of accelerometers was to obtain the reference data, which allowed for comparison with the measurement data obtained from the laser vibrometer. The analysis of the obtained measurement data, in the fields of time and frequency, made it possible to verify the correctness of the data obtained by means of laser vibrometry and to determine the requirements which are necessary for the correct performance of NDT tests and in the future structural health monitoring (SHM) system of welded joints with the use of a laser vibrometer. The mathematical model developed in the MSC software Pastran-Nastran was also used in the work. The model was developed for the purpose of mutual verification of the measurement and calculation tests. At the present stage of work, it can be stated that the results obtained by laser vibrometry methods should be treated as a supplement to the research conducted with traditional piezoelectric accelerometers. In certain situations, they can be used as an alternative to accelerometers, due to the fact that laser sensors do not require direct contact with the examined object. Where the object under test may be in a strong electromagnetic field, optical sensors are better suited than contact sensors.

Air-coupled laser vibrometry: analysis and applications

2008 ◽  
Vol 48 (7) ◽  
pp. C33 ◽  
Author(s):  
Igor Solodov ◽  
Daniel Döring ◽  
Gerd Busse
Keyword(s):  
Laser Vibrometry

Specific Features of Nondestructive Testing of Polymer and Composite Materials Using Air-Coupled Ultrasonic Excitation and Laser Vibrometry

2021 ◽  
Vol 57 (8) ◽  
pp. 647-655
Author(s):  
V. Yu. Shpil’noi ◽  
V. P. Vavilov ◽  
D. A. Derusova ◽  
N. V. Druzhinin ◽  
A. Yu. Yamanovskaya
Keyword(s):  
Composite Materials ◽  
Nondestructive Testing ◽  
Laser Vibrometry

Complex experimental approach to carbon-carbon composite defect detection by laser vibrometry and optical thermography

2019 ◽  
Author(s):  
V. A. Krasnoveikin ◽  
N. V. Druzhinin ◽  
V. Yu. Shpil’noi ◽  
D. A. Derusova
Keyword(s):  
Defect Detection ◽  
Experimental Approach ◽  
Carbon Composite ◽  
Laser Vibrometry ◽  
Composite Defect

Mesoscale Dynamic Ice Formation and Breaking on a Vibrating Thin Membrane

1999 ◽  
Author(s):  
Jeff Fullilove ◽  
Norman Miller ◽  
Mark Shannon ◽  
Michael Philpot ◽  
Alexander Vakakis ◽  
...  
Keyword(s):  
Average Rate ◽  
Ice Formation ◽  
Experimental Measurements ◽  
Thin Membrane ◽  
Laser Vibrometry ◽  
Membrane Interaction ◽  
Analytical Results ◽  
Vibrating Membrane

Abstract We study dynamic ice formation and breaking (IF/B) on a thin vibrating membrane. The complicated discontinuous dynamics of the membrane is studied experimentally using laser vibrometry. Although the fluid- and coolant-membrane interaction with simultaneous ice forming and breaking is a complicated dynamical phenomenon, the average rate of ice formed and broken can be approximately quantified. The analytical results are compared to experimental measurements.

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