### Algorithm for dynamic numerical damping in the elastodynamics demo

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I can't find the algorithm that is used in the elastodynamics demo. I understood that the algorithm of Newmark was used for the temporal part but I don't understand why there are alpha_m and alpha_f in the weak formulation. I imagine that it is to realize the damping of the numerical model but I do not find the mathematical bases. Do you have a scientific article that could help me?

Thanks,

Arnaud

Thanks,

Arnaud

Community: FEniCS Project

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