TY - JOUR
T1 - Computer generated optical holographic fringe patterns for the analysis of vibrating structures
AU - Roesel, Martin
AU - Herstrass, K
AU - Bajons, Peter
N1 - DOI: 10.1016/S0041-624X(03)00169-0
Coden: ULTRA
Affiliations: Institute of Material Physics, University of Vienna, Strudlhofgasse 4, Wien A-1090, Austria
Adressen: Bajons, P.; Institute of Material Physics; University of Vienna; Strudlhofgasse 4 Wien A-1090, Austria; email: [email protected]
Import aus Scopus: 2-s2.0-0142247334
PY - 2003
Y1 - 2003
N2 - Optical holographic interference fringe patterns on rods and bars vibrating in ultrasonic resonance (standing waves) are predicted by computer simulations. The simulations are based on a combination of finite element calculations with calculations based on the theory of holographic interference fringe generation. The hypothetical fringe patterns are then compared to holographic fringe images obtained by the experiment (time average holograms). The holographic arrangement and the mechanical part of the ultrasonic system (transducer, horn and specimen) were fixed on a commercial rigid optical table supported on air bags to isolate it from ground vibrations. Thus it is shown that the scope of the study can be reached with a minimum of experimental effort, i.e., with basic laser optical equipment. It is shown that provided the system operates in the desired mode, good agreement between the theoretical and the real image is given. Finally examples of the possible influence of defects or of parasitic modes of vibration on the appearance of the fringe patterns are given. © 2003 Elsevier B.V. All rights reserved.
AB - Optical holographic interference fringe patterns on rods and bars vibrating in ultrasonic resonance (standing waves) are predicted by computer simulations. The simulations are based on a combination of finite element calculations with calculations based on the theory of holographic interference fringe generation. The hypothetical fringe patterns are then compared to holographic fringe images obtained by the experiment (time average holograms). The holographic arrangement and the mechanical part of the ultrasonic system (transducer, horn and specimen) were fixed on a commercial rigid optical table supported on air bags to isolate it from ground vibrations. Thus it is shown that the scope of the study can be reached with a minimum of experimental effort, i.e., with basic laser optical equipment. It is shown that provided the system operates in the desired mode, good agreement between the theoretical and the real image is given. Finally examples of the possible influence of defects or of parasitic modes of vibration on the appearance of the fringe patterns are given. © 2003 Elsevier B.V. All rights reserved.
U2 - 10.1016/S0041-624X(03)00169-0
DO - 10.1016/S0041-624X(03)00169-0
M3 - Article
SN - 0041-624X
VL - 41
SP - 663
EP - 669
JO - Ultrasonics
JF - Ultrasonics
IS - 8
ER -