By Tahar Fakhfakh, Fakher Chaari, Lasaad Walha, Moez Abdennadher, Mohamed Slim Abbes, Mohamed Haddar

The e-book presents readers with a image of modern learn and business traits in box of commercial acoustics and vibration. each one bankruptcy, permitted after a rigorous peer-review technique, reviews on a particular, unique piece of labor awarded and mentioned at foreign convention on Acoustics and Vibration (ICAV2016), which was once geared up by way of the Tunisian organization of business Acoustics and Vibration (ATAVI) and held March 21-23, in Hammamet, Tunisia. The contributions, usually written by means of north African authors, covers advances in either concept and perform in various subfields, resembling: clever fabrics and constructions; fluid-structure interplay; structural acoustics in addition to computational vibro-acoustics and numerical equipment. additional issues comprise: engines regulate, noise id, strong layout, flow-induced vibration and lots of others.This publication presents a worthwhile source for either lecturers and pros facing different concerns in utilized mechanics. by way of combining complex theories with business concerns, it really is anticipated to facilitate conversation and collaboration among varied teams of researchers and know-how users.

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Extra info for Advances in Acoustics and Vibration: Proceedings of the International Conference on Acoustics and Vibration (ICAV2016), March 21-23, Hammamet, Tunisia

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We also define the sampling function wm (that we shall use in the inversion algorithm) as wm ðx0 ; zÞ :¼ U2 ðx0 ; zÞ ¼ expð2ikjz À x0 jÞ ð4pjz À x0 jÞ2 in the case of mono-polar inclusions and as sampling function wb wb ðx0 ; zÞ :¼ rUðx0 ; zÞ:rUðx0 ; zÞ ¼  2 expð2ikjz À x0 jÞ 1 ik À 16p2 jz À x0 j this function in the case of dipolar inclusions. We observe from the expressions of ~ us ðg; x0 Þ that F has a finite rank. We denote by P? the orthogonal projection on T, and P== the orthogonal projection on the line R^v.

2009, 2012) that the only parameters to maximize are the modal coupling factors (MEMCF). Since the optimal value of the electric circuit parameters are known as functions of the MEMCF and the system structural characteristics, they can be evaluated in a second step. e. finding the best design. Considering all these features, the optimization problem can be described as:  2 ð pÞ maximize : HðxÞ ¼ ki ; fxg subjected to: À h iT where fxg ¼ x1 x2 . . xe N Á ½Kuu ðxފ À x2i ½Muu ðxފ fUi g ¼ f0g ðSC modal problemÞ 0\xmin xn 1 Z e max e ðxn Þ ¼ fxgdX X X e is the volume of the design domain and X e max is the upper bounds where X restricting the material to be used in the piezoelectric layer.

This procedure has the advantage of being automatic and intrinsically handle the case of multiple points belonging to Rj . It can also be easily extended to the case of more than two sets of data (which would increase the precision and robustness with respect to noise). 4 Numerical Results Before starting the presentation of some numerical results, we first give some details related to the implementation of our algorithm. We consider two parallel paths T and T 0 containing each N sources points and we assume that we have R receivers at each source position.

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