Linearly Accelerated Frame
When you add a Linearly Accelerated Frame node, inertial forces are applied to all selected features in the physics interface with a density, mass, or mass distribution. You select boundaries, and all edges and points which belong to the selection are automatically included.
Shell Properties
Select the layer or layers to which the frame acceleration force is to be applied.
When Use all layers is not selected.
All other settings for the Linearly Accelerated Frame node are described in the documentation for Linearly Accelerated Frame in the Solid Mechanics interface.
Location in User Interface
Context Menus
Ribbon
Physics tab with Layered Shell selected: