Explicit v/s Transient Analysis

Which analysis system should I use, Explicit Dynamics or Transient if I want to reduce the running time?

In ANSYS Mechanical, structural analysis in both space and time domains can be conducted either in Transient Structural or Explicit Dynamics Analysis system. There are a lot of factors that could influence the decision on which analysis system to use.

You can access the relevant file here – Download Files 

For additional details, you may want to refer to the document below –