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CAE Fidesys 9.0 Documentation |
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CAE Fidesys 9.0 Documentation |
The user can set the pressure acting on entity of dimension 1D and 2D. To create or change a previously created pressure, do the following:
On the Command Bar, select Mode - Boundary Conditions, Entity - Pressure.
Depending on the situation, select Action - Create or Action - Modufy.
Use the dialog elements to set the ID (ID) or the name of a set of boundary conditions, specify the entity to which pressure is applied, enter its value and other necessary data.
Click Apply.
These interactive operations correspond to the commands:
create pressure [ID] [name <'name'>] [{add | on} {sideset | surface | curve | face | tri | edge} <entity_list>] [magnitude <value>] [TOP | bottom] [PRESSURE | totalforce]
modify pressure {ID_list | 'name' | all} [name <'name'>] [{add | remove} {sideset | surface | curve | face | tri | edge} <entity_list>] [magnitude <value>] [TOP | bottom] [PRESSURE | totalforce]
The pressure acting in the direction of the faces of the elements is considered positive. It is always oriented normal to the face. For shells and independent surfaces are valid "the rule of the left hand": if the thumb of the left hand is directed towards the surface, and the direction of the bending of the fingers coincides with the direction of numbering the vertices of the element, then the pressure action corresponds to the direction of the thumb.
The pressure value (magnitude) is set using the option magnitude <value>. If the user has not entered a value (<value>), it will be assumed to be zero with the appropriate warning.
The keyword TOP (by default) indicates, that pressure is applied to the upper surface of the shell element. The keyword bottom means applying pressure to its lower surface.