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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:03 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Optics, Spectroscopy, Plasma and Lasers
Title:
Facility for vibration and shock testing using laser vibrometry
Authors:
Dan Sporea (1), Laura Mihai (1), Andrei Stancalie (1), Constantin Grigoriu (1), Flavia-Delia Frumosu (2)
Affiliation:
1. National Institute for Laser, Plasma and Radiation Physics
2. Technical University of Denmark
E-mail
dan.sporea@inflpr.ro
Keywords:
laser vibrometry, shock and vibration testing, vibration damping, 3D scanning
Abstract:
The paper presents a facility for vibrations and shock testing, set up in the premises of the Centre for Advanced Laser Technologies (the CETAL project). This facility includes: two rooms with vibration and acoustic isolation; a Polytec PSV-400-3D scanning vibrometer; a Dongling Corporation ES-6-230/GT500M/HE500SM electrodynamic vibration system; a PDV-100 portable vibrometer.
The characteristics of these equipments are:
a) PSV-400-3D: 3D vibration measurements; scans area from mm2 to m2; working distances between 40 mm and 100 m; fiber optic differential measurements; close-up unit; maximum frequency - 80 kHz; maximum vibration velocity - 10 m/s;
b) ES-6-230/GT500M/HE500SM: generated force: sine vibrations (Pk) - 6 kN; random (Rms) - 6 kN; shock (Pk) - 12 kN; maximum displacement < 51 mm; vertical load - 300 kg; maximum acceleration - 100 g; maximum speed - 1.8 m/s; amplifier frequency response, full power from 1 Hz to 3000 Hz; S/N > 65 dB;
c) PDV-100: non-contact velocity measurement from 0 to 22 kHz; three velocity ranges; digital signal processing; analog and digital signal outputs; working distance from 0.2 m - 30 m.
Some examples of tests carried out with the laser vibrometers for vibrations evaluation of handheld machine tools, vibration damping systems [1] and loudspeakers are presented.
The development and run of this facility were financially supported by the grants: MIDAS (ANCS contract No. 72/2007), CETAL (UEFISCDI contract No. 8PM/I 2010); Program “Nucleu” (Ministerul Educatiei Nationale - Unitatea de Stat pentru Cercetare Stiintifica, Dezvoltare Tehnologica si Inovare contract No. PN 09 39.07.01).
[1] D. Sporea, F.-D. Frumosu, Vibration damping investigations using laser vibrometry and the ANOVA method, in Advanced Mathematical and Computational Tools in Metrology and Testing, vol.9, F Pavese, M Bär, J-R Filtz, A B Forbes, L Pendrill, H. Shirono, eds., Series on Advances in Mathematics for Applied Sciences vol. 84, World Scientific, Singapore, 2012, pp. 385-391.
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