Load Step Inputs
Load step inputs organize and manage the IDs of analysis parameter bulk cards.
Nastran Cards
Card | Description |
---|---|
ACSRCE | Defines the power versus frequency curve for a simple acoustic source. |
DLOAD | Selects a dynamic load to be applied in a transient and
frequency response analysis subcase. The DLOAD command can also
be used to select a user-defined loading curve to be applied in a nonlinear static
analysis subcase. Note: Subcase Information Entry
Enable the subcase definition DLOAD and select load collectors with dynamic loading information (DLOAD, RLOAD1, RLOAD2, TLOAD1, TLOAD2). |
EIGC | Defines data needed to perform complex eigenvalue analysis |
EIGRA | Defines the data required to perform real eigenvalue
analysis with the Automated Multi-Level Sub-structuring technique. Note: Bulk Data Entry
|
EIGRL | Defines data required to perform real eigenvalue analysis
(vibration or buckling) with the Lanczos Method. Note: Bulk Data Entry
|
NLPARM | Activates nonlinear solution methods for this subcase
and to select the parameters used for Nonlinear Quasi-static Analysis, Geometric
Nonlinear Implicit Analysis, and Nonlinear Direct Transient Analysis. Note: Subcase Information Entry
|
RGYRO | Includes data required to perform Rotor Dynamics analysis
in Modal Frequency Response Analysis and/or Modal Complex Eigenvalue Analysis. The
RGYRO Bulk Data Entry is referenced by a corresponding
RGYRO Subcase Information Entry in a specific
subcase. Note: Bulk Data Entry
|
RLOAD1 | Defines a frequency-dependent dynamic load of the form: for use in frequency response problems |
RLOAD2 | Defines a frequency-dependent dynamic excitation of the form: for use in frequency response problems |
TLOAD1 | Defines a time-dependent dynamic load or enforced motion of
the form: |
TLOAD2 | Defines a time-dependent dynamic excitation or enforced
motion of the form: |
OptiStruct Cards
Card | Description |
---|---|
ACSRCE | Defines acoustic source as a function of power vs.
frequency. Note: Bulk Data Entry
|
BASELIN | Baseline correction |
DLOAD | Defines a dynamic loading condition for frequency response
problems as a linear combination of load sets defined via RLOAD1
and RLOAD2 entries, or for transient problems as a linear
combination of load sets defined via TLOAD1 and
TLOAD2 entries, or acoustic source ACSRCE
entries. Note: Bulk Data Entry
|
EIGC | Defines data required to perform complex eigenvalue
analysis. Note: Bulk Data Entry
|
EIGRA | Defines the data required to perform real eigenvalue analysis
with the Automated Multi-Level Sub-structuring technique. Note: Bulk Data Entry
|
EIGRL | Defines data required to perform real eigenvalue analysis
(vibration or buckling) with the Lanczos Method. Note: Bulk Data Entry
|
NLADAPT | The NLADAPT entry can be used in the Subcase
Information section to select the parameters used for Large Displacement Nonlinear
Quasi-static Analysis, Small Displacement Nonlinear Quasi-Static Analysis, and
Nonlinear Transient Analysis. Note: Subcase Information
Entry
|
NLENRG | Energy variable output |
NLMON | This NLMON Subcase Information Entry can be used to
activate Nonlinear Monitoring for a subcase by referencing a corresponding NLMON
Bulk Data Entry. Note: Subcase Information
Entry
|
NLOUT | The NLOUT entry can be used in the Subcase Information
section to select the incremental result output parameters used for Nonlinear Static
Analysis and Nonlinear Transient Analysis. Note: Subcase Information
Entry
|
NLPARM | Activates nonlinear solution methods for this subcase
and to select the parameters used for Nonlinear Quasi-static Analysis, Geometric
Nonlinear Implicit Analysis, and Nonlinear Direct Transient Analysis. Note: Subcase Information Entry
|
NLPRINT | Controls printing message. |
RGYRO | Includes data required to perform Rotor Dynamics analysis
in Modal Frequency Response Analysis and/or Modal Complex Eigenvalue Analysis. The
RGYRO Bulk Data Entry is referenced by a corresponding
RGYRO Subcase Information Entry in a specific
subcase. Note: Bulk Data Entry
|
RLOAD1 | Defines a frequency-dependent dynamic load of the form
for use in frequency response problems.
RLOAD2 (Form 2) can be used when the frequency-dependent
dynamic load input is available in magnitude/phase number format. Note: Bulk Data Entry
|
RLOAD2 | Specifies directional combination method, modal combination
method, excitation direction(s), response spectra and scale factors. Note: Bulk Data Entry
|
TLOAD1 | Defines a time-dependent dynamic load or enforced motion.
Note: Bulk Data Entry
|
TLOAD2 | Defines a time-dependent dynamic excitation or enforced
motion. Note: Bulk Data Entry
|
UNBALNC | Defines the unbalanced rotating load during a rotor
dynamic analysis in Frequency Response solution sequences. The unbalanced load is
specified in a cylindrical system where the rotor rotation axis is the
Z-axis. Note: Bulk Data Entry
|