AbsIncreAcc
Absolute Acceleration Increment
In the governing equation,
\[
\mathbf{M\cdot\Delta{}A=R},
\]
this converger tests the norm of displacement increment, viz.,
\[
\left|\mathbf{\Delta{}A}\right|_\infty\leqslant{}tol.
\]
The equation of motion based on acceleration is conventionally the governing equation in explicit analysis.