Modeling a surface-mounted Lamb wave emission-reception system: applications to structural health monitoring.
The work described in this paper is intended to present a simple and efficient way of modeling a full Lamb wave emission and reception system. The emitter behavior and the Lamb wave generation are predicted using a two-dimensional (2D) hybrid finite element-normal mode expansion model. Then the receiver electrical response is obtained from a finite element computation with prescribed displacements. A numerical correction is applied to the 2D results in order to account for the in-plane radiation divergence caused by the finite length of the emitter. The advantage of this modular approach is that realistic configurations can be simulated without performing cumbersome modeling and time-consuming computations. It also provides insight into the physical interpretation of the results. A good agreement is obtained between predicted and measured signals. The range of application of the method is discussed.
Moulin
Emmanuel
E
OAE Department, IEMN, UMR CNRS 8520, Universite de Valenciennes et du Hainaut Cambresis, Le Mont Houy, Valenciennes Cedex 9, France. emmanuel.moulin@univ-valenciennes.fr
Grondel
Sébastien
S
Assaad
Jamal
J
Duquenne
Laurent
L
D000162:Acoustics / Q000295:instrumentation; D003198:Computer Simulation; D004867:Equipment Design; D020342:Finite Element Analysis; D008420:Manufactured Materials; D008422:Materials Testing / Q000295:instrumentation / Q000379:methods*; D008962:Models, Theoretical; D015203:Reproducibility of Results; D013997:Time Factors; D014159:Transducers; D014732:Vibration