The Attachment node is used to define a point or a set of points on a flexible beam which can be used to connect it with other components through a joint in the Multibody Dynamics interface. All the selected points behave as if they were connected by a common rigid body.
The Attachment node is available with either the Multibody Dynamics Module or the Rotordynamics Module. The use of attachments is discussed in the Attachments section in the Multibody Dynamics Module User’s Guide.