When somebody knocks on a plate‐shaped object, the first antisymmetric Lamb wave is created, propagates, and is reflected a lot before vanishing. It has been recently shown [Appl. Phys. Lett. 87, 204104 (2005)] that if the wave is recorded by an accelerometer, it is possible to deduce the knock position thanks to a cross‐correlation technique. Now it is of interest to be able to simulate the wave field created in such experiments, for example in order to study the influence of various parameters, or possibly to try to replace the learning phase of this localization technique by a numerical prediction of the impulse responses. Therefore, in this talk, a finite difference code is presented, simulating the A0 wave in the frequency range excited by a knock on a plate, i.e., [0, 10 kHz]. It is based on a new wave equation of the flexural wave, which takes into account shear correction. Experiments on plates have been carried out to validate the simulation. It is shown that the spectrum of the experimental waves of this reverberant cavity is the same as the simulated one. [This work was financially supported by the TAICHI European project.]
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May 2006
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May 04 2006
Simulation of the propagation of the first antisymmetric Lamb mode in the audible range
Guillemette Ribay;
Guillemette Ribay
Laboratoire Ondes et Acoustique, 10 rue Vauquelin, 75005 Paris, France
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Stefan Catheline;
Stefan Catheline
Laboratoire Ondes et Acoustique, 10 rue Vauquelin, 75005 Paris, France
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Didier Cassereau;
Didier Cassereau
Laboratoire Ondes et Acoustique, 10 rue Vauquelin, 75005 Paris, France
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Mathias Fink
Mathias Fink
Laboratoire Ondes et Acoustique, 10 rue Vauquelin, 75005 Paris, France
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J. Acoust. Soc. Am. 119, 3390 (2006)
Citation
Guillemette Ribay, Stefan Catheline, Didier Cassereau, Mathias Fink; Simulation of the propagation of the first antisymmetric Lamb mode in the audible range. J. Acoust. Soc. Am. 1 May 2006; 119 (5_Supplement): 3390. https://doi.org/10.1121/1.4786654
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