Mass
The Mass () feature connects a lumped mass between two nodes in the mechanical system.
Name
Enter a component Name for the mass. The default name (for the first instance) is M1.
Node Connections
Set the two Node names for the connecting nodes for the mass.
Component Parameters
Specify the value of the Mass, m.
Initial Values
Enter the values of Initial displacement (u) and Initial velocity (u/∂t). The initial values are used in a time dependent analysis.
Gravity
Select the Exclude contribution checkbox in order to exclude the contribution of gravity force.
Results
Select appropriate options in the Add the following to default results in order to include the following quantities in the default plots or evaluations:
Force
Displacement
Acceleration
Context Menus
Ribbon
Physics tab with  Lumped Mechanical System selected: