Phase
You can add a Phase subnode to nodes which define a load in order to prescribe the phase angle in a frequency domain analysis.
For modeling the frequency response the physics interface splits the harmonic load into two parameters:
The amplitude, F, which is specified in the node for the load.
Together these define a harmonic load, for which the amplitude and phase shift can vary with the excitation frequency, f:
Shell Properties

Phase
Enter the components of Load phase in radians (for a pressure the load phase is a scalar value). Add [deg] to a phase value to specify it using degrees.
Location in User Interface
Context Menus
Ribbon
Physics tab with Body Load, Boundary Load, Face Load, Edge Load, Point Load, Applied Force, or Applied Moment selected: