The following list of attributes are required for the Nastran AIM inside the geometry input.
- capsIntent This attribute is a CAPS requirement to indicate the analysis fidelity the geometry representation supports. Options are: ALL, STRUCTURE
- capsGroup This is a name assigned to any geometric body. This body could be a solid, surface, face, wire, edge or node. Recall that a string in ESP starts with a $. For example, attribute
capsGroup $Wing
.
- capsLoad This is a name assigned to any geometric body where a load is applied. This attribute was separated from the
capsGroup
attribute to allow the user to define a local area to apply a load on without adding multiple capsGroup
attributes. Recall that a string in ESP starts with a $. For example, attribute capsLoad $force
.
- capsConstraint This is a name assigned to any geometric body where a constraint/boundary condition is applied. This attribute was separated from the
capsGroup
attribute to allow the user to define a local area to apply a boundary condition without adding multiple capsGroup
attributes. Recall that a string in ESP starts with a $. For example, attribute capsConstraint $fixed
.
- capsIgnore It is possible that there is a geometric body (or entity) that you do not want the Nastran AIM to pay attention to when creating a finite element model. The capsIgnore attribute allows a body (or entity) to be in the geometry and ignored by the AIM. For example, because of limitations in OpenCASCADE a situation where two edges are overlapping may occur; capsIgnore allows the user to only pay attention to one of the overlapping edges.
- capsConnect This is a name assigned to any geometric body where the user wishes to create "fictitious" connections such as springs, dampers, and/or rigid body connections to. The user must manually specify the connection between two
capsConnect
entities using the "Connect" tuple (see AIM Inputs). Recall that a string in ESP starts with a $. For example, attribute capsConnect $springStart
.
- capsConnectLink Similar to
capsConnect
, this is a name assigned to any geometric body where the user wishes to create "fictitious" connections to. A connection is automatically made if a capsConnectLink
matches a capsConnect
group. Again further specifics of the connection are input using the "Connect" tuple (see AIM Inputs). Recall that a string in ESP starts with a $. For example, attribute capsConnectLink $springEnd
.
- capsBound This is used to mark surfaces on the structural grid in which data transfer with an external solver will take place. See Nastran Data Transfer for additional details.
Internal Aeroelastic Analysis
- capsBound This is used to mark surfaces on the structural grid in which a spline will be created between the structural and aero-loads.
- capsReferenceArea [Optional: Default 1.0] Reference area to use when doing aeroelastic analysis. This attribute may exist on any aerodynamic cross-section.
- capsReferenceChord [Optional: Default 1.0] Reference chord to use when doing aeroelastic analysis. This attribute may exist on any aerodynamic cross-section.
- capsReferenceSpan [Optional: Default 1.0] Reference span to use when doing aeroelastic analysis. This attribute may exist on any aerodynamic cross-section.