Initial velocity (LS-DYNA)

In the LS-DYNA environment, use the Initial Velocity command to define the initial rotational and translational velocities of selected nodes or bodies, such as in a crash analysis.

You can use options in the Type list in the Initial Velocity dialog box to specify the type of initial velocity to create.

Type list option	Description	Corresponding LS-DYNA keyword
INITIAL_VELOCITY	Defines the initial rotational and translational velocities for selected nodes with respect to the absolute (global) coordinate system.	*INITIAL_VELOCITY_GENERATION
INITIAL_VELOCITY_GENERATION	Defines the initial velocities for rotating and translating bodies.Optionally, you can also specify a Start Time at which to initialize the initial velocities.	INITIAL_VELOCITY_GENERATIONINITIAL_VELOCITY_GENERATION_START_TIME
INITIAL_VELOCITY_RIGID_BODY	Defines initial translational and rotational velocities for selected rigid bodies. You select one or more physical property tables to define the rigid bodies.	*INITIAL_VELOCITY_RIGID_BODY

Where do I find it?

Application	Pre/Post
Prerequisite	An active Simulation file with LS-DYNA as the specified solver
Command Finder	Initial Velocity
Simulation Navigator	In the appropriate solution, right-click Constraint Container→New Constraint→Initial Velocity

Learn more

Contact interference (Abaqus)

Constrained keywords for rigid body creation (LS-DYNA)

Enforced acceleration constraint (ANSYS)

Fixed and free boundary degrees of freedom (Nastran, ANSYS, and Abaqus)

Initial forces on beam element axes (LS-DYNA)

Initial stress (LS-DYNA)

Rigid wall definition (LS-DYNA)

Single point constraints for boundary nodes (LS-DYNA)

Enforced velocity constraint (ANSYS)

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Initial velocity (LS-DYNA), Simcenter 3D 2021.1 Series

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