A generalized finite element method for the strongly damped wave equation with rapidly varying data
We propose a generalized finite element method for the strongly damped wave equation with highly varying coefficients. The proposed method is based on the localized orthogonal decomposition introduced in Malqvist and Peterseim [Math. Comp. 83 (2014) 2583 2603] and is designed to handle independent variations in both the damping and the wave propagation speed respectively. The method does so by automatically correcting for the damping in the transient phase and for the propagation speed in the steady state phase. Convergence of optimal order is proven in L2(H1) norm, independent of the derivatives of the coefficients. We present numerical examples that confirm the theoretical findings.
ESAIM: Mathematical Modelling and Numerical Analysis