You can assign a translational or angular velocity to a single body or to multiple bodies. In an Explicit Dynamics analysis, by default, all bodies are assumed to be at rest with no external constraint or load applied. It is not a requirement to apply these types of initial conditions to a body.

An Explicit Dynamics solution requires that the model contains at least one initial condition (translational or angular velocity), a non-zero constraint (displacement or velocity), or a valid load.

You can use the results of an implicit analysis as a pre-stress initial condition for an Explicit Dynamics analysis. For more information, see Applying Pre-Stress Effects for Explicit Analysis.