COMSOL 6.4 - Body Load

Add a to domains for modeling volumetric loads.

Select a — or to specify the load in the appropriate frame.

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Since the rotor is modeled in a rotating frame in a Solid Rotor interface, a stationary load in a frame works as a stationary load in the model. A stationary load in the frame will, however, change its direction with the angular velocity of the rotor, and therefore acts as a time-dependent load in the model.

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In the Solid Rotor, Fixed Frame interface the above behavior of the loads in different frames is interchanged.

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For a frequency domain analysis, a load in the frame is shifted with the rotor’s phase to give the effect of the rotation in the Solid Rotor interface.

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Similarly, a load in the frame is shifted with the rotor’s phase for a frequency domain analysis to give the effect of rotation in the Solid Rotor, Fixed Frame interface.

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For a stationary analysis, has no influence on the analysis.

Force

Select a — , , or .

Then enter values or expressions for the force components based on the selection.

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After selecting a , the list normally only contains . When combined with another physics interface that can provide this type of load, it is also possible to choose a predefined load from this list.

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For , COMSOL Multiphysics divides the total force by the volume of the domains where the load is active.


Load Type	variable	SI unit
Force per reference volume	fV	N/m3
Force per deformed volume	fv	N/m3
Total force	Ftot	N


	You can add the Phase subnode to specify the phase of this load in a frequency domain analysis.

Location in User Interface

Context Menus

Ribbon

Physics tab with selected: