node_damping index damping_x damping_y damping_z

This record adds a discrete damper to node index in $x$, $y$ and $z$ direction respectively. In 1D only damping_x needs to be specified, etc. The damper will lead to a nodal force of the size $damping\_x * v\_x$ where $v_x$ is the velocity in $x$ direction. The same holds for the $y$ and $z$ direction.