On the stability of Timoshenko-type systems with internal frictional dampings and discrete time delays

Aissa Guesmia (1) , Abdelaziz Soufyane (2)

1 IECL - Institut Élie Cartan de Lorraine
2 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)

In this paper, we consider a vibrating system of Timoshenko-type in a bounded one-dimensional domain under Dirichlet-Dirichlet or Dirichlet-Neumann boundary conditions with one or two discrete time delays and one or two internal frictional dampings. First, we show that the system is well posed in the sens of semigroup theory. Second, we prove the exponential stability regardless to the speeds of wave propagation of the system if the weights of the time delays are smaller than the ones of the corresponding dampings, respectively. However, when the weight of one time delay is not smaller than the one of the corresponding damping, we prove the exponential stability in case of equal-speed wave propagation, and the polynomial stability in the opposite case.

Mots clés: Lyapunov functional; Well posedness; stability; time delay; frictional damping; Timoshenko-type; semigroup theory

Domaines: Equations aux dérivées partielles [math.AP]

Aissa Guesmia, Abdelaziz Soufyane. On the stability of Timoshenko-type systems with internal frictional dampings and discrete time delays. Applicable Analysis, 2016, 96 (12), pp.2075-2101. ⟨10.1080/00036811.2016.1204439⟩. ⟨hal-02891551⟩