The Newmark accelerations can be noisy for many problems. The Newmark assumption uses the average acceleration [(a(t) + a(t+dt))/2] in its calculation. Initial conditions and nonlinearities can cause the values at “t” and “t+dt” to oscillate (sometimes wildly). Rather than reporting these accelerations in the output, when AVSMOOTH is 1, we report the averaged value so that a smooth solution is seen.