In this paper, we consider the energy decay of a damped hyperbolic system of wave-wave type which is coupled through the velocities. We are interested in the asymptotic properties of the solutions of this system in the case of indirect nonlinear damping, . when only one equation is directly damped by a nonlinear damping. We prove that the total energy of the whole system decays as fast as the damped single equation. Moreover, we give a one-step general explicit decay formula for arbitrary nonlinearity. Our results shows that the damping properties are fully transferred from the damped equation to the undamped one by the coupling in velocities, different from the case of couplings through displacements as shown in [F. Alabau, C. R. Acad. Sci. Paris Sér. I Math. 328 (1999) 1015–1020; F. Alabau, P. Cannarsa and V. Komornik, J. Evol. Equ. 2 (2002) 127–150; F. Alabau, SIAM J. Control Optim. 41 (2002) 511–541; F. Alabau-Boussouira and M. Léautaud, ESAIM: COCV 18 (2012) 548–582] for the linear damping case, and in [F. Alabau-Boussouira, NoDEA 14 (2007) 643–669] for the nonlinear damping case. The proofs of our results are based on multiplier techniques, weighted nonlinear integral inequalities and the optimal-weight convexity method of [F. Alabau-Boussouira, Appl. Math. Optim. 51 (2005) 61–105; F. Alabau-Boussouira, J. Differ. Equ. 248 (2010) 1473–1517].
Accepté le :
DOI : 10.1051/cocv/2016011
Mots-clés : Energy decay, nonlinear damping, wave equation, plate equation, weighted nonlinear integral inequality, optimal-weight convexity method
@article{COCV_2017__23_2_721_0, author = {Alabau-Boussouira, Fatiha and Wang, Zhiqiang and Yu, Lixin}, title = {A one-step optimal energy decay formula for indirectly nonlinearly damped hyperbolic systems coupled by velocities}, journal = {ESAIM: Control, Optimisation and Calculus of Variations}, pages = {721--749}, publisher = {EDP-Sciences}, volume = {23}, number = {2}, year = {2017}, doi = {10.1051/cocv/2016011}, zbl = {1362.35176}, mrnumber = {3608100}, language = {en}, url = {http://www.numdam.org/articles/10.1051/cocv/2016011/} }
TY - JOUR AU - Alabau-Boussouira, Fatiha AU - Wang, Zhiqiang AU - Yu, Lixin TI - A one-step optimal energy decay formula for indirectly nonlinearly damped hyperbolic systems coupled by velocities JO - ESAIM: Control, Optimisation and Calculus of Variations PY - 2017 SP - 721 EP - 749 VL - 23 IS - 2 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/cocv/2016011/ DO - 10.1051/cocv/2016011 LA - en ID - COCV_2017__23_2_721_0 ER -
%0 Journal Article %A Alabau-Boussouira, Fatiha %A Wang, Zhiqiang %A Yu, Lixin %T A one-step optimal energy decay formula for indirectly nonlinearly damped hyperbolic systems coupled by velocities %J ESAIM: Control, Optimisation and Calculus of Variations %D 2017 %P 721-749 %V 23 %N 2 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/cocv/2016011/ %R 10.1051/cocv/2016011 %G en %F COCV_2017__23_2_721_0
Alabau-Boussouira, Fatiha; Wang, Zhiqiang; Yu, Lixin. A one-step optimal energy decay formula for indirectly nonlinearly damped hyperbolic systems coupled by velocities. ESAIM: Control, Optimisation and Calculus of Variations, Tome 23 (2017) no. 2, pp. 721-749. doi : 10.1051/cocv/2016011. http://www.numdam.org/articles/10.1051/cocv/2016011/
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