Modal time history analysis follows steps similar to a spectrum analysis. The modes of vibration of the system are calculated. The dynamic equation of motion is solved through numeric integration techniques for each mode at a number of successive time steps. The modal results are then summed, yielding system responses at each time step.
The Dynamic Output Processor displays one load case (and optionally, one load combination) with the maximum loads developed throughout the load application. You can also request snap-shot cases at different load levels.