Structure for the analysis tuple = (`Analysis Name', `Value'). 'Analysis Name' defines the reference name for the analysis being specified. The "Value" can either be a JSON String dictionary (see Section JSON String Dictionary) or a single string keyword (see Section Single Value String).
JSON String Dictionary
If "Value" is JSON string dictionary (e.g. "Value" = {"numDesiredEigenvalue": 10, "eigenNormaliztion": "MASS", "numEstEigenvalue": 1, "extractionMethod": "GIV", "frequencyRange": [0, 10000]}) the following keywords ( = default values) may be used:
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analysisType = "Modal"
Type of load. Options: "Modal", "Static", "AeroelasticTrim", "AeroelasticFlutter" Note: "AeroelasticStatic" is still supported but refers to "AeroelasticTrim" Note: "Optimization" and "StaticOpt" are not valid - Optimization is initialized by the Analysis_Type AIM Input
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analysisLoad = "(no default)"
Single or list of "Load Name"s defined in FEA Load in which to use for the analysis (e.g. "Name1" or ["Name1","Name2",...].
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analysisConstraint = "(no default)"
Single or list of "Constraint Name"s defined in FEA Constraint in which to use for the analysis (e.g. "Name1" or ["Name1","Name2",...].
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analysisSupport = "(no default)"
Single or list of "Support Name"s defined in FEA Support in which to use for the analysis (e.g. "Name1" or ["Name1","Name2",...].
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analysisDesignConstraint = "(no default)"
Single or list of "Design Constraint Name"s defined in FEA DesignConstraint in which to use for the analysis (e.g. "Name1" or ["Name1","Name2",...].
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extractionMethod = "(no default)"
Extraction method for modal analysis.
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frequencyRange = [0.0, 0.0]
Frequency range of interest for modal analysis.
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numEstEigenvalue = 0
Number of estimated eigenvalues for modal analysis.
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numDesiredEigenvalue = 0
Number of desired eigenvalues for modal analysis.
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eigenNormaliztion = "(no default)"
Method of eigenvector renormilization. Options: "POINT", "MAX", "MASS"
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gridNormaliztion = 0
Grid point to be used in normalizing eigenvector to 1.0 when using eigenNormaliztion = "POINT"
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componentNormaliztion = 0
Degree of freedom about "gridNormalization" to be used in normalizing eigenvector to 1.0 when using eigenNormaliztion = "POINT"
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lanczosMode = 2
Mode refers to the Lanczos mode type to be used in the solution. In mode 3 the mass matrix, Maa,must be nonsingular whereas in mode 2 the matrix K aa - sigma*Maa must be nonsingular
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lanczosType = "(no default)"
Lanczos matrix type. Options: DPB, DGB.
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machNumber = 0.0 or [0.0, ..., 0.0]
Mach number used in trim analysis OR Mach numbers used in flutter analysis..
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dynamicPressure = 0.0
Dynamic pressure used in trim analysis.
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density = 0.0
Density used in trim analysis to determine true velocity, or flutter analysis.
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aeroSymmetryXY = "(no default)"
Aerodynamic symmetry about the XY Plane. Options: SYM, ANTISYM, ASYM. Aerodynamic symmetry about the XY Plane. Options: SYM, ANTISYM, ASYM. SYMMETRIC Indicates that a half span aerodynamic model is moving in a symmetric manner with respect to the XY plane. ANTISYMMETRIC Indicates that a half span aerodynamic model is moving in an antisymmetric manner with respect to the XY plane. ASYMMETRIC Indicates that a full aerodynamic model is provided.
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aeroSymmetryXZ = "(no default)"
Aerodynamic symmetry about the XZ Plane. Options: SYM, ANTISYM, ASYM. SYMMETRIC Indicates that a half span aerodynamic model is moving in a symmetric manner with respect to the XZ plane. ANTISYMMETRIC Indicates that a half span aerodynamic model is moving in an antisymmetric manner with respect to the XZ plane. ASYMMETRIC Indicates that a full aerodynamic model is provided.
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rigidVariable = ["no default"]
List of rigid body motions to be used as trim variables during a trim analysis. Nastran valid labels are: ANGLEA, SIDES, ROLL, PITCH, YAW, URDD1, URDD2, URDD3, URDD4, URDD5, URDD6
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rigidConstraint = ["no default"]
List of rigid body motions to be used as trim constraint variables during a trim analysis. Nastran valid labels are: ANGLEA, SIDES, ROLL, PITCH, YAW, URDD1, URDD2, URDD3, URDD4, URDD5, URDD6
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magRigidConstraint = [0.0 , 0.0, ...]
List of magnitudes of trim constraint variables. If none and 'rigidConstraint'(s) are specified then 0.0 is assumed for each rigid constraint.
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controlConstraint = ["no default"]
List of controls surfaces to be used as trim constraint variables during a trim analysis.
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magControlConstraint = [0.0 , 0.0, ...]
List of magnitudes of trim control surface constraint variables. If none and 'controlConstraint'(s) are specified then 0.0 is assumed for each control surface constraint.
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reducedFreq = [0.1, ..., 20.0], No Default Values are defined.
Reduced Frequencies to be used in Flutter Analysis. Up to 8 values can be defined.
Single Value String
If "Value" is a string, the string value may correspond to an entry in a predefined analysis lookup table. NOT YET IMPLEMENTED!!!!